Fast-Travel Acme Rods | McMaster-Carr

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System of Measurement

Thread Size

Component

Number of Thread Starts

Travel Distance per Turn

Nut Type

Thread Direction

Speed Ratio

Material

Diameter

Thread Pitch

Thread Type

Metric Rounded Trapezoidal

Rounded Acme

Tensile Strength

Less than 10,000 psi

10,000 psi to 19,999 psi

20,000 psi to 69,999 psi

70,000 psi to 99,999 psi

100,000 psi or greater

Not Rated

Export Control Classification Number (ECCN)

EAR99

DFARS Specialty Metals

Compliant

Exempt

RoHS

Compliant

Compliant with Exemptions

REACH

Hardness

Dynamic Thrust Load Capacity

Less than 500 lb.

500 lb. to 999 lb.

1,000 lb. to 1,999 lb.

2,000 lb. to 2,999 lb.

End Type

Width

Number of Mounting Holes

Maximum Temperature

Height

Flange Material

359 Products

Selecting Compatible Lead Screws and Nuts

Multiple thread channels (also known as thread starts) create faster linear travel than lead screws with a single thread start. The threads have a tight thread fit for accurate, repeatable starts and stops. Pair with a motor in automated motion and positioning applications. To ensure compatibility, please select components that have the same thread direction, thread size, and number of thread starts.

Carbon steel lead screws and flanges have good machinability. Black-oxide alloy steel lead screws are hard and strong. They have mild corrosion resistance. 303 and 304 stainless steel lead screws and flanges have good corrosion resistance.

Cast iron nuts have good machinability and high strength. 360 brass nuts have excellent machinability and good corrosion resistance. 932 bearing bronze and 673 bronze nuts are wear resistant. They have good machinability and fair corrosion resistance. PET plastic nuts are lightweight and corrosion resistant.

Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.

For technical drawings and 3-D models, click on a part number.

Lead Screws—Right-Hand Threaded

1018 Carbon Steel
Thread Size	Lg.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Accuracy for Travel Distance per Turn	Thread Fit	Hardness	Tensile Strength, psi		Each
1/4"-12	18"	4	4:1	0.333"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	000000
1/4"-12	3 ft.	4	4:1	0.333"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	00000
1/4"-16	18"	4	4:1	0.25"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	00000
1/4"-16	3 ft.	4	4:1	0.25"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	00000
3/8"-5	3 ft.	5	5:1	1"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
3/8"-5	6 ft.	5	5:1	1"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
3/8"-8	18"	2	2:1	0.25"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	00000
3/8"-8	18"	4	4:1	0.5"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	00000
3/8"-8	3 ft.	2	2:1	0.25"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
3/8"-8	3 ft.	4	4:1	0.5"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
3/8"-8	6 ft.	2	2:1	0.25"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
3/8"-8	6 ft.	4	4:1	0.5"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
3/8"-10	18"	2	2:1	0.2"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	0000
3/8"-10	3 ft.	2	2:1	0.2"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	00000
3/8"-12	18"	2	2:1	0.167"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	00000
3/8"-12	3 ft.	2	2:1	0.167"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
3/8"-12	6 ft.	2	2:1	0.167"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
1/2"-8	3 ft.	2	2:1	0.25"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
1/2"-8	3 ft.	8	8:1	1"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
1/2"-8	6 ft.	2	2:1	0.25"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
1/2"-8	6 ft.	8	8:1	1"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
1/2"-10	3 ft.	2	2:1	0.2"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
1/2"-10	3 ft.	5	5:1	0.5"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
1/2"-10	6 ft.	2	2:1	0.2"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
1/2"-10	6 ft.	5	5:1	0.5"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
5/8"-8	3 ft.	2	2:1	0.25"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
5/8"-8	6 ft.	2	2:1	0.25"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
3/4"-6	3 ft.	2	2:1	0.333"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
3/4"-6	6 ft.	2	2:1	0.333"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
3/4"-8	3 ft.	2	2:1	0.25"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
3/4"-8	3 ft.	4	4:1	0.5"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
3/4"-8	6 ft.	2	2:1	0.25"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
3/4"-8	6 ft.	4	4:1	0.5"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
1"-4	3 ft.	2	2:1	0.5"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
1"-4	6 ft.	2	2:1	0.5"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
1"-6	3 ft.	2	2:1	0.333"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
1"-6	6 ft.	2	2:1	0.333"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
1"-10	3 ft.	10	10:1	1"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
1"-10	6 ft.	10	10:1	1"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
1 1/2"-4	3 ft.	2	2:1	0.5"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
1 1/2"-4	6 ft.	2	2:1	0.5"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
Black-Oxide 4140 Alloy Steel
1/4"-12	3 ft.	4	4:1	0.333"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	00000
1/4"-12	6 ft.	4	4:1	0.333"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	000000
3/8"-8	3 ft.	2	2:1	0.25"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	00000
3/8"-8	3 ft.	4	4:1	0.5"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	00000
3/8"-8	6 ft.	2	2:1	0.25"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	000000
3/8"-8	6 ft.	4	4:1	0.5"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	000000
1/2"-8	3 ft.	2	2:1	0.25"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	00000
1/2"-8	6 ft.	2	2:1	0.25"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	000000
1/2"-10	3 ft.	2	2:1	0.2"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	00000
1/2"-10	3 ft.	5	5:1	0.5"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	00000
1/2"-10	6 ft.	2	2:1	0.2"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	000000
1/2"-10	6 ft.	5	5:1	0.5"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	00000
3/4"-6	3 ft.	2	2:1	0.333"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	00000
3/4"-6	6 ft.	2	2:1	0.333"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	000000
1"-10	3 ft.	10	10:1	1"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	000000
1"-10	6 ft.	10	10:1	1"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	000000
304 Stainless Steel
1/4"-12	18"	4	4:1	0.333"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	00000
1/4"-12	3 ft.	4	4:1	0.333"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	00000
1/4"-12	6 ft.	4	4:1	0.333"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
3/8"-8	18"	2	2:1	0.25"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	00000
3/8"-8	18"	4	4:1	0.5"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	00000
3/8"-8	3 ft.	2	2:1	0.25"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	00000
3/8"-8	3 ft.	4	4:1	0.5"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	00000
3/8"-8	6 ft.	2	2:1	0.25"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
3/8"-8	6 ft.	4	4:1	0.5"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
3/8"-10	18"	2	2:1	0.2"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	00000
3/8"-10	3 ft.	2	2:1	0.2"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	00000
3/8"-10	6 ft.	2	2:1	0.2"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
1/2"-8	3 ft.	2	2:1	0.25"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	00000
1/2"-8	3 ft.	8	8:1	1"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	00000
1/2"-8	6 ft.	2	2:1	0.25"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
1/2"-8	6 ft.	8	8:1	1"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
1/2"-10	3 ft.	2	2:1	0.2"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	00000
1/2"-10	3 ft.	5	5:1	0.5"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	00000
1/2"-10	6 ft.	2	2:1	0.2"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
1/2"-10	6 ft.	5	5:1	0.5"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
3/4"-8	3 ft.	4	4:1	0.5"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	000000
3/4"-8	6 ft.	4	4:1	0.5"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000

Lead Screws—Left-Hand Threaded

1018 Carbon Steel
Thread Size	Lg., ft.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Accuracy for Travel Distance per Turn	Thread Fit	Hardness	Tensile Strength, psi		Each
3/8"-12	3	2	2:1	0.167"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
3/8"-12	6	2	2:1	0.167"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
5/8"-8	3	2	2:1	0.25"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
5/8"-8	6	2	2:1	0.25"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
3/4"-6	3	2	2:1	0.333"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
3/4"-6	6	2	2:1	0.333"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
3/4"-8	3	2	2:1	0.25"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
3/4"-8	6	2	2:1	0.25"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
1"-4	3	2	2:1	0.5"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
1"-4	6	2	2:1	0.5"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
1"-6	3	2	2:1	0.333"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	00000
1"-6	6	2	2:1	0.333"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
1"-10	3	10	10:1	1"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
1"-10	6	10	10:1	1"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
1 1/2"-4	3	2	2:1	0.5"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
1 1/2"-4	6	2	2:1	0.5"	±0.009" per ft.	Class 2C	Brinell 126	64,000	000000000	000000
Black-Oxide 4140 Alloy Steel
3/4"-6	3	2	2:1	0.333"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	00000
3/4"-6	6	2	2:1	0.333"	±0.009" per ft.	Class 2C	Brinell 271	125,000	000000000	000000

Round Nuts—Right-Hand Threaded

Cast Iron
Thread Size	Lg.	Dia.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Thread Fit	Hardness	Dynamic Thrust Load Cap., lbs.	Temperature Range, °F		Each
1/4"-12	3/4"	1.344"	4	4:1	0.333"	Class 2C	Brinell 217	Not Rated	__	000000000	000000
3/8"-8	3/4"	1.344"	2	2:1	0.25"	Class 2C	Brinell 217	Not Rated	__	000000000	00000
3/8"-8	3/4"	1.344"	4	4:1	0.5"	Class 2C	Brinell 217	Not Rated	__	000000000	00000
3/8"-10	3/4"	1.344"	2	2:1	0.2"	Class 2C	Brinell 217	Not Rated	__	000000000	00000
1/2"-8	1"	1.469"	2	2:1	0.25"	Class 2C	Brinell 217	Not Rated	__	000000000	00000
1/2"-10	1"	1.469"	2	2:1	0.2"	Class 2C	Brinell 217	Not Rated	__	000000000	00000
1/2"-10	1"	1.469"	5	5:1	0.5"	Class 2C	Brinell 217	Not Rated	__	000000000	00000
932 Bearing Bronze
1/4"-12	3/4"	1.344"	4	4:1	0.333"	Class 2C	Brinell 65	320	__	00000000	00000
3/8"-8	3/4"	1.344"	2	2:1	0.25"	Class 2C	Brinell 65	700	__	00000000	00000
3/8"-8	3/4"	1.344"	4	4:1	0.5"	Class 2C	Brinell 65	700	__	00000000	00000
3/8"-10	3/4"	1.344"	2	2:1	0.2"	Class 2C	Brinell 65	700	__	00000000	00000
1/2"-8	1"	1.469"	2	2:1	0.25"	Class 2C	Brinell 65	1,300	__	0000000	00000
1/2"-10	1"	1.469"	2	2:1	0.2"	Class 2C	Brinell 65	1,300	__	0000000	00000
1/2"-10	1"	1.469"	5	5:1	0.5"	Class 2C	Brinell 65	1,300	__	00000000	00000
PET Plastic
1/4"-12	3/4"	1.344"	4	4:1	0.333"	Class 2C	Not Rated	160	15° to 175°	00000000	00000
3/8"-8	3/4"	1.344"	2	2:1	0.25"	Class 2C	Not Rated	350	15° to 175°	00000000	00000
3/8"-8	3/4"	1.344"	4	4:1	0.5"	Class 2C	Not Rated	350	15° to 175°	00000000	00000
3/8"-10	3/4"	1.344"	2	2:1	0.2"	Class 2C	Not Rated	350	15° to 175°	00000000	00000
1/2"-8	1"	1.469"	2	2:1	0.25"	Class 2C	Not Rated	650	15° to 175°	0000000	00000
1/2"-10	1"	1.469"	2	2:1	0.2"	Class 2C	Not Rated	650	15° to 175°	0000000	00000
1/2"-10	1"	1.469"	5	5:1	0.5"	Class 2C	Not Rated	650	15° to 175°	00000000	00000

Round Nuts—Left-Hand Threaded

932 Bearing Bronze
Thread Size	Lg.	Dia.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Thread Fit	Hardness	Dynamic Thrust Load Cap., lbs.		Each
1/4"-12	3/4"	1.344"	4	4:1	0.333"	Class 2C	Brinell 65	320	00000000	000000
3/8"-8	3/4"	1.344"	2	2:1	0.25"	Class 2C	Brinell 65	700	00000000	00000
3/8"-8	3/4"	1.344"	4	4:1	0.5"	Class 2C	Brinell 65	700	00000000	00000
3/8"-10	3/4"	1.344"	2	2:1	0.2"	Class 2C	Brinell 65	700	00000000	00000
1/2"-10	1"	1.469"	5	5:1	0.5"	Class 2C	Brinell 65	1,300	00000000	00000

Externally Threaded Nuts—Right-Hand Threaded

Combine externally threaded nuts with a flange to create a custom flange nut.

						External Thread
Thread Size	Lg.	Dia.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Size	Lg.	Thread Fit	Hardness	Dynamic Thrust Load Cap., lbs.	Temperature Range, °F		Each
360 Brass
1/4"-16	5/8"	0.688"	4	4:1	0.25"	9/16"-18	3/8"	Class 2C	Brinell 70	300	__	000000000	000000
5/8"-8	1"	1.125"	2	2:1	0.25"	15/16"-16	1/2"	Class 2C	Brinell 70	1,900	__	000000000	00000
3/4"-8	1 1/4"	1.125"	2	2:1	0.25"	1"-18	1/2"	Class 2C	Brinell 70	2,800	__	000000000	00000
1"-4	1 1/2"	1.5"	2	2:1	0.5"	1 3/8"-16	1/2"	Class 2C	Brinell 70	5,000	__	000000000	00000
1"-6	1 1/2"	1.5"	2	2:1	0.333"	1 3/8"-16	1/2"	Class 2C	Brinell 70	5,000	__	000000000	00000
673 Bronze
1/4"-12	5/8"	0.688"	4	4:1	0.333"	9/16"-18	3/8"	Class 2C	Brinell 70	Not Rated	__	000000000	00000
3/8"-8	5/8"	0.688"	2	2:1	0.25"	9/16"-18	3/8"	Class 2C	Brinell 70	Not Rated	__	000000000	00000
3/8"-8	5/8"	0.688"	4	4:1	0.5"	9/16"-18	3/8"	Class 2C	Brinell 70	Not Rated	__	000000000	00000
3/8"-10	5/8"	0.688"	2	2:1	0.2"	9/16"-18	3/8"	Class 2C	Brinell 70	Not Rated	__	000000000	00000
3/8"-12	5/8"	0.688"	2	2:1	0.167"	9/16"-18	3/8"	Class 2C	Brinell 70	Not Rated	__	000000000	00000
1/2"-8	3/4"	1.125"	2	2:1	0.25"	15/16"-16	1/2"	Class 2C	Brinell 70	Not Rated	__	000000000	00000
1/2"-8	3/4"	1.125"	8	8:1	1"	15/16"-16	1/2"	Class 2C	Brinell 70	Not Rated	__	000000000	00000
1/2"-10	3/4"	1.125"	2	2:1	0.2"	15/16"-16	1/2"	Class 2C	Brinell 70	Not Rated	__	000000000	00000
1/2"-10	3/4"	1.125"	5	5:1	0.5"	15/16"-16	1/2"	Class 2C	Brinell 70	Not Rated	__	000000000	00000
3/4"-6	1 1/4"	1.125"	2	2:1	0.333"	1"-18	1/2"	Class 2C	Brinell 70	Not Rated	__	000000000	00000
3/4"-8	1 1/4"	1.125"	4	4:1	0.5"	1"-18	1/2"	Class 2C	Brinell 70	Not Rated	__	000000000	00000
1"-10	1 1/2"	1.5"	10	10:1	1"	1 3/8"-16	1/2"	Class 2C	Brinell 70	Not Rated	__	000000000	00000
1 1/2"-4	2 19/64"	2.125"	2	2:1	0.5"	1 31/32"-18	13/16"	Class 2C	Brinell 70	Not Rated	__	000000000	000000
PET Plastic
1/4"-12	5/8"	0.688"	4	4:1	0.333"	9/16"-18	3/8"	Class 2C	Not Rated	160	15° to 175°	000000000	00000
3/8"-5	5/8"	0.688"	5	5:1	1"	9/16"-18	3/8"	Class 2C	Not Rated	250	15° to 175°	000000000	00000
3/8"-8	5/8"	0.688"	2	2:1	0.25"	9/16"-18	3/8"	Class 2C	Not Rated	350	15° to 175°	000000000	00000
3/8"-8	5/8"	0.688"	4	4:1	0.5"	9/16"-18	3/8"	Class 2C	Not Rated	350	15° to 175°	000000000	00000
3/8"-10	5/8"	0.688"	2	2:1	0.2"	9/16"-18	3/8"	Class 2C	Not Rated	350	15° to 175°	000000000	00000
1/2"-8	3/4"	1.125"	2	2:1	0.25"	15/16"-16	1/2"	Class 2C	Not Rated	650	15° to 175°	000000000	00000
1/2"-10	3/4"	1.125"	2	2:1	0.2"	15/16"-16	1/2"	Class 2C	Not Rated	650	15° to 175°	000000000	00000
1/2"-10	3/4"	1.125"	5	5:1	0.5"	15/16"-16	1/2"	Class 2C	Not Rated	650	15° to 175°	000000000	00000
3/4"-8	1 1/4"	1.125"	4	4:1	0.5"	1"-18	1/2"	Class 2C	Not Rated	1,450	15° to 175°	000000000	00000
1"-4	1 1/2"	1.5"	2	2:1	0.5"	1 3/8"-16	1/2"	Class 2C	Not Rated	2,500	15° to 175°	000000000	00000

Externally Threaded Nuts—Left-Hand Threaded

Combine externally threaded nuts with a flange to create a custom flange nut.

						External Thread
Thread Size	Lg.	Dia.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Size	Lg.	Thread Fit	Hardness	Dynamic Thrust Load Cap., lbs.		Each
360 Brass
5/8"-8	1"	1.125"	2	2:1	0.25"	15/16"-16	1/2"	Class 2C	Brinell 70	1,900	000000000	000000
3/4"-8	1 1/4"	1.125"	2	2:1	0.25"	1"-18	1/2"	Class 2C	Brinell 70	2,800	000000000	00000
1"-4	1 1/2"	1.5"	2	2:1	0.5"	1 3/8"-16	1/2"	Class 2C	Brinell 70	5,000	000000000	00000
1"-6	1 1/2"	1.5"	2	2:1	0.333"	1 3/8"-16	1/2"	Class 2C	Brinell 70	5,000	000000000	00000
673 Bronze
3/8"-12	5/8"	0.688"	2	2:1	0.167"	9/16"-18	3/8"	Class 2C	Brinell 70	Not Rated	000000000	00000
3/4"-6	1 1/4"	1.125"	2	2:1	0.333"	1"-18	1/2"	Class 2C	Brinell 70	Not Rated	000000000	00000
1"-10	1 1/2"	1.5"	10	10:1	1"	1 3/8"-16	1/2"	Class 2C	Brinell 70	Not Rated	000000000	00000
1 1/2"-4	2 19/64"	2.125"	2	2:1	0.5"	1 31/32"-18	13/16"	Class 2C	Brinell 70	Not Rated	000000000	000000

Flanges

Thread onto an externally threaded acme nut to create a custom flange nut.

Carbon steel flanges have good machinability. However, they will rust when exposed to moisture. Black-oxide carbon steel flanges have mild corrosion resistance in dry environments and a dark surface color. 303 stainless steel flanges have good corrosion resistance.

1117 Carbon Steel
Flange Thread Size	Flange Dia.	Flange Thick.	Bolt Circle Dia.	Flange Hardness		Each
1 3/8"-16	2 49/64"	33/64"	2 17/64"	Brinell 156	000000000	000000
1 31/32"-18	4 13/64"	53/64"	3 7/16"	Brinell 156	000000000	00000
1215 Carbon Steel
1"-18	2 5/8"	17/32"	2 3/32"	Not Rated	000000000	00000
15/16"-16	2 5/8"	17/32"	2 3/32"	Not Rated	000000000	00000
9/16"-18	1 39/64"	13/32"	1 1/8"	Not Rated	000000000	00000
303 Stainless Steel
1 3/8"-16	2 49/64"	33/64"	2 17/64"	Brinell 140	0000000	00000
1 31/32"-18	4 13/64"	53/64"	3 7/16"	Brinell 140	0000000	000000
1"-18	2 5/8"	17/32"	2 3/32"	Brinell 140	0000000	00000
15/16"-16	2 5/8"	17/32"	2 3/32"	Brinell 140	0000000	00000
9/16"-18	1 39/64"	13/32"	1 1/8"	Brinell 140	0000000	00000

Precision Acme Lead Screws and Nuts

Pair with a motor in automated motion and positioning applications. A tight thread fit allows these lead screws and nuts to make accurate, repeatable starts and stops. Also known as single-start and self-locking lead screws and nuts, they have a single thread that runs the length of the screw. The nut travels only when the screw turns, so your system won’t unexpectedly move when the lead screw is at rest. To ensure compatibility, please select components that have the same thread direction, thread size, and number of thread starts.

Carbon steel lead screws and flanges have good machinability. Black-oxide alloy steel lead screws are hard and strong. They have mild corrosion resistance and a dark surface color. 303 and 304 stainless steel lead screws and flanges have good corrosion resistance.

360 brass nuts have excellent machinability and good corrosion resistance. PEEK plastic nuts handle twice as much heat as PET and acetal plastic nuts. They have good chemical resistance and excellent corrosion resistance.

Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.

For technical drawings and 3-D models, click on a part number.

Round Nuts—Right-Hand Threaded

PEEK Plastic
Thread Size	Lg.	Dia.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Thread Fit	Hardness	Dynamic Thrust Load Cap., lbs.	Temperature Range, °F		Each
1/2"-10	1"	1.5"	1	1:1	0.1"	Class 2C	Not Rated	5,650	-40° to 525°	000000000	0000000

Externally Threaded Nuts—Right-Hand Threaded

Combine externally threaded nuts with a flange to create a custom flange nut.

						External Thread
Thread Size	Lg.	Dia.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Size	Lg.	Thread Fit	Hardness	Dynamic Thrust Load Cap., lbs.	Temperature Range, °F		Each
360 Brass
1/4"-20	5/8"	0.688"	1	1:1	0.05"	9/16"-18	3/8"	Class 2C	Brinell 141	310	__	000000000	000000
1/2"-10	3/4"	1.125"	1	1:1	0.1"	15/16"-16	1/2"	Class 2C	Brinell 141	1,250	__	000000000	00000
3/4"-5	1 1/4"	1.125"	1	1:1	0.2"	1"-18	1/2"	Class 2C	Brinell 141	2,800	__	000000000	00000
3/4"-6	1 1/4"	1.125"	1	1:1	0.166"	1"-18	1/2"	Class 2C	Brinell 141	2,800	__	000000000	00000
3/4"-10	1 1/4"	1.125"	1	1:1	0.1"	1"-18	1/2"	Class 2C	Brinell 141	2,800	__	000000000	00000
1"-4	1 1/2"	1.5"	1	1:1	0.25"	1 3/8"-16	1/2"	Class 2C	Brinell 141	5,000	__	000000000	00000
1"-5	1 1/2"	1.5"	1	1:1	0.2"	1 3/8"-16	1/2"	Class 2C	Brinell 141	5,000	__	000000000	00000
1"-10	1 1/2"	1.5"	1	1:1	0.1"	1 3/8"-16	1/2"	Class 2C	Brinell 141	5,000	__	000000000	00000
1 1/2"-10	2 19/64"	2.125"	1	1:1	0.1"	1 31/32"-18	13/16"	Class 2C	Brinell 141	11,250	__	000000000	000000
Acetal Plastic
3/4"-8	1 1/4"	1.125"	1	1:1	0.125"	1"-18	1/2"	Class 2C	Rockwell R120	1,400	-40° to 190°	000000000	00000
3/4"-16	1 1/4"	1.125"	1	1:1	0.063"	1"-18	1/2"	Class 2C	Rockwell R120	1,400	-40° to 190°	000000000	00000
1"-8	1 1/2"	1.5"	1	1:1	0.125"	1 3/8"-16	1/2"	Class 2C	Rockwell R120	2,500	-40° to 190°	000000000	00000
1 1/2"-10	2 19/64"	2.125"	1	1:1	0.1"	1 31/32"-18	13/16"	Class 2C	Rockwell R120	5,600	-40° to 190°	000000000	000000
PEEK Plastic
1/4"-20	5/8"	0.688"	1	1:1	0.05"	9/16"-18	3/8"	Class 2C	Not Rated	150	-40° to 525°	000000000	000000
1/2"-10	3/4"	1.125"	1	1:1	0.1"	15/16"-16	1/2"	Class 2C	Not Rated	620	-40° to 525°	000000000	000000
3/4"-5	1 1/4"	1.125"	1	1:1	0.2"	1"-18	1/2"	Class 2C	Not Rated	1,400	-40° to 525°	000000000	000000
3/4"-6	1 1/4"	1.125"	1	1:1	0.166"	1"-18	1/2"	Class 2C	Not Rated	1,400	-40° to 525°	000000000	000000
3/4"-10	1 1/4"	1.125"	1	1:1	0.1"	1"-18	1/2"	Class 2C	Not Rated	1,400	-40° to 525°	000000000	000000
1"-4	1 1/2"	1.5"	1	1:1	0.25"	1 3/8"-16	1/2"	Class 2C	Not Rated	2,500	-40° to 525°	000000000	000000
1"-5	1 1/2"	1.5"	1	1:1	0.2"	1 3/8"-16	1/2"	Class 2C	Not Rated	2,500	-40° to 525°	000000000	000000
1"-10	1 1/2"	1.5"	1	1:1	0.1"	1 3/8"-16	1/2"	Class 2C	Not Rated	2,500	-40° to 525°	000000000	000000
1 1/4"-5	1 3/4"	2.125"	1	1:1	0.2"	1 31/32"-18	13/16"	Class 2C	Not Rated	3,900	-40° to 525°	000000000	000000

Flanges

Thread onto an externally threaded acme nut to create a custom flange nut.

1117 Carbon Steel
Flange Thread Size	Flange Dia.	Flange Thick.	Bolt Circle Dia.	Flange Hardness		Each
1 3/8"-16	2 49/64"	33/64"	2 17/64"	Brinell 156	000000000	000000
1 31/32"-18	4 13/64"	53/64"	3 7/16"	Brinell 156	000000000	00000
Black-Oxide 1117 Carbon Steel
9/16"-18	1 39/64"	13/32"	1 1/8"	Brinell 135	00000000	00000
15/16"-16	2 39/64"	17/32"	2 3/32"	Brinell 135	00000000	00000
1 3/8"-16	2 49/64"	33/64"	2 17/64"	Brinell 135	00000000	00000
1 31/32"-18	4 13/64"	53/64"	3 7/16"	Brinell 135	00000000	00000
1215 Carbon Steel
9/16"-18	1 39/64"	13/32"	1 1/8"	Not Rated	000000000	00000
15/16"-16	2 5/8"	17/32"	2 3/32"	Not Rated	000000000	00000
1"-18	2 5/8"	17/32"	2 3/32"	Not Rated	000000000	00000
303 Stainless Steel
9/16"-18	1 39/64"	13/32"	1 1/8"	Brinell 140	0000000	00000
15/16"-16	2 5/8"	17/32"	2 3/32"	Brinell 140	0000000	00000
1"-18	2 5/8"	17/32"	2 3/32"	Brinell 140	0000000	00000
1 3/8"-16	2 49/64"	33/64"	2 17/64"	Brinell 140	0000000	00000
1 31/32"-18	4 13/64"	53/64"	3 7/16"	Brinell 140	0000000	000000

Metric Fast-Travel Ultra-Precision Lead Screws and Nuts

Multiple thread channels (also known as thread starts) create faster linear travel than lead screws with a single thread start. Operating with less backlash (play) than Metric Precision Acme Lead Screws and Nuts, these lead screws and nuts provide increased nut life and more reliable movement in automated systems. To ensure compatibility, select components that have the same thread size, thread pitch, and number of thread starts.

Lead screws with one machinable end let you create your own custom connection to suit your application.

Lead screws with one coupling end connect directly with your shaft without extra machining. Torque down the locknut once inserted.

Alloy steel lead screws are hard and strong. 303 and 304 stainless steel lead screws have good corrosion resistance.

Flange nuts with a wear-compensating internal O-ring resist backlash to keep the nuts in place and maintain a tight fit even when their threads begin to wear. They’re often used in 3D printing and robotic applications.

Acetal nuts have good wear and corrosion resistance.

Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.

For technical drawings and 3-D models, click on a part number.

Lead Screws—Right-Hand Threaded

4140 Alloy Steel
Thread Size	Thread Pitch, mm	Lg., mm	No. of Thread Starts	Thread Type	Speed Ratio	Travel Distance per Turn, mm	Accuracy for Travel Distance per Turn	Hardness	Tensile Strength, psi		Each
M5	1.25	100	4	Metric Rounded Trapezoidal	4:1	5	±0.089 mm per 300 mm	Brinell 200	90,000	000000000	000000
M5	1.25	175	4	Metric Rounded Trapezoidal	4:1	5	±0.089 mm per 300 mm	Brinell 200	125,000	000000000	00000
M8	2	200	2	Metric Rounded Trapezoidal	2:1	4	±0.089 mm per 300 mm	Brinell 200	125,000	000000000	00000
M8	2	300	2	Metric Rounded Trapezoidal	2:1	4	±0.089 mm per 300 mm	Brinell 200	125,000	000000000	00000
303 Stainless Steel
M2	0.5	50	2	Metric Rounded Trapezoidal	2:1	1	±0.089 mm per 300 mm	Brinell 160	90,000	000000000	00000
M2	0.5	100	2	Metric Rounded Trapezoidal	2:1	1	±0.089 mm per 300 mm	Brinell 160	90,000	000000000	00000
M4	1.25	75	8	Metric Rounded Trapezoidal	8:1	10	±0.089 mm per 300 mm	Brinell 160	90,000	000000000	00000
M4	1.25	150	8	Metric Rounded Trapezoidal	8:1	10	±0.089 mm per 300 mm	Brinell 160	90,000	000000000	00000
304 Stainless Steel
M8	2.5	250	4	Metric Rounded Trapezoidal	4:1	10	±0.1 mm per 300 mm	Brinell 160	72,000	0000000	00000
M8	2.5	500	4	Metric Rounded Trapezoidal	4:1	10	±0.1 mm per 300 mm	Brinell 160	72,000	0000000	00000
M10	3	250	4	Metric Rounded Trapezoidal	4:1	12	±0.1 mm per 300 mm	Brinell 160	72,000	0000000	00000
M10	3	500	4	Metric Rounded Trapezoidal	4:1	12	±0.1 mm per 300 mm	Brinell 160	72,000	0000000	00000
M12	2.5	250	2	Metric Rounded Trapezoidal	2:1	5	±0.1 mm per 300 mm	Brinell 160	72,000	0000000	00000
M12	2.5	500	2	Metric Rounded Trapezoidal	2:1	5	±0.1 mm per 300 mm	Brinell 160	72,000	0000000	00000
M12	2.5	1,000	2	Metric Rounded Trapezoidal	2:1	5	±0.1 mm per 300 mm	Brinell 160	72,000	0000000	000000
M16	5	250	7	Metric Rounded Trapezoidal	7:1	35	±0.1 mm per 300 mm	Brinell 160	72,000	0000000	00000
M16	5	500	7	Metric Rounded Trapezoidal	7:1	35	±0.1 mm per 300 mm	Brinell 160	72,000	0000000	000000
M16	5	1,000	7	Metric Rounded Trapezoidal	7:1	35	±0.1 mm per 300 mm	Brinell 160	72,000	0000000	000000
M20	5	500	4	Metric Rounded Trapezoidal	4:1	20	±0.1 mm per 300 mm	Brinell 160	72,000	0000000	000000
M20	5	1,000	4	Metric Rounded Trapezoidal	4:1	20	±0.1 mm per 300 mm	Brinell 160	72,000	0000000	000000
M20	7.5	500	8	Metric Rounded Trapezoidal	8:1	60	±0.1 mm per 300 mm	Brinell 160	72,000	0000000	000000
M20	7.5	1,000	8	Metric Rounded Trapezoidal	8:1	60	±0.1 mm per 300 mm	Brinell 160	72,000	0000000	000000
17-4 PH Stainless Steel
M2	0.4	145	2	Metric Rounded Trapezoidal	2:1	0.75	±0.15 mm per 300 mm	Rockwell C35	145,000	00000000	000000
M2	0.4	145	4	Metric Rounded Trapezoidal	4:1	1.5	±0.15 mm per 300 mm	Rockwell C35	145,000	00000000	000000
M2	0.4	145	8	Metric Rounded Trapezoidal	8:1	3	±0.15 mm per 300 mm	Rockwell C35	145,000	00000000	000000
M3	0.5	145	2	Metric Rounded Trapezoidal	2:1	1	±0.15 mm per 300 mm	Rockwell C35	145,000	00000000	000000
M3	0.5	145	6	Metric Rounded Trapezoidal	6:1	3	±0.15 mm per 300 mm	Rockwell C35	145,000	00000000	000000
M3	0.5	145	12	Metric Rounded Trapezoidal	12:1	6	±0.15 mm per 300 mm	Rockwell C35	145,000	00000000	000000
M4	1	145	4	Metric Rounded Trapezoidal	4:1	4	±0.15 mm per 300 mm	Rockwell C35	145,000	00000000	000000
M4	1	145	8	Metric Rounded Trapezoidal	8:1	8	±0.15 mm per 300 mm	Rockwell C35	145,000	00000000	000000

Lead Screws with One Machinable End—Right-Hand Threaded

					Machinable End
Thread Size	Thread Pitch, mm	Lg., mm	No. of Thread Starts	Thread Type	Dia., mm	Lg., mm	Speed Ratio	Travel Distance per Turn, mm	Accuracy for Travel Distance per Turn	Hardness	Tensile Strength, psi		Each
17-4 PH Stainless Steel
M2	0.4	150	2	Metric Rounded Trapezoidal	7	25	2:1	0.75	±0.15 mm per 300 mm	Rockwell C35	145,000	00000000	0000000
M2	0.4	150	4	Metric Rounded Trapezoidal	7	25	4:1	1.5	±0.15 mm per 300 mm	Rockwell C35	145,000	00000000	000000
M2	0.4	150	8	Metric Rounded Trapezoidal	7	25	8:1	3	±0.15 mm per 300 mm	Rockwell C35	145,000	00000000	000000
M3	0.5	150	2	Metric Rounded Trapezoidal	7	25	2:1	1	±0.15 mm per 300 mm	Rockwell C35	145,000	00000000	000000
M3	0.5	150	6	Metric Rounded Trapezoidal	7	25	6:1	3	±0.15 mm per 300 mm	Rockwell C35	145,000	00000000	000000
M3	0.5	150	12	Metric Rounded Trapezoidal	7	25	12:1	6	±0.15 mm per 300 mm	Rockwell C35	145,000	00000000	000000
M4	1	150	4	Metric Rounded Trapezoidal	7	25	4:1	4	±0.15 mm per 300 mm	Rockwell C35	145,000	00000000	000000
M4	1	150	8	Metric Rounded Trapezoidal	7	25	8:1	8	±0.15 mm per 300 mm	Rockwell C35	145,000	00000000	000000

Lead Screws with One Coupling End—Right-Hand Threaded

					Compression End
Thread Size	Thread Pitch, mm	Lg., mm	No. of Thread Starts	Thread Type	Dia., mm	Lg., mm	For Shaft Dia., mm	Speed Ratio	Travel Distance per Turn, mm	Accuracy for Travel Distance per Turn	Hardness	Tensile Strength, psi		Each
17-4 PH Stainless Steel
M2	0.4	150	2	Metric Rounded Trapezoidal	6.5	15	2	2:1	0.75	±0.15 mm per 300 mm	Rockwell C35	145,000	00000000	0000000
M2	0.4	150	4	Metric Rounded Trapezoidal	6.5	15	2	4:1	1.5	±0.15 mm per 300 mm	Rockwell C35	145,000	00000000	000000
M2	0.4	150	8	Metric Rounded Trapezoidal	6.5	15	2	8:1	3	±0.15 mm per 300 mm	Rockwell C35	145,000	00000000	000000
M3	0.5	150	2	Metric Rounded Trapezoidal	7.5	15.5	3	2:1	1	±0.15 mm per 300 mm	Rockwell C35	145,000	00000000	000000
M3	0.5	150	6	Metric Rounded Trapezoidal	7.5	15.5	3	6:1	3	±0.15 mm per 300 mm	Rockwell C35	145,000	00000000	000000
M3	0.5	150	12	Metric Rounded Trapezoidal	7.5	15.5	3	12:1	6	±0.15 mm per 300 mm	Rockwell C35	145,000	00000000	000000
M4	1	150	4	Metric Rounded Trapezoidal	8.5	15.5	4	4:1	4	±0.15 mm per 300 mm	Rockwell C35	145,000	00000000	000000
M4	1	150	4	Metric Rounded Trapezoidal	9.5	15.5	5	4:1	4	±0.15 mm per 300 mm	Rockwell C35	145,000	00000000	000000
M4	1	150	8	Metric Rounded Trapezoidal	8.5	15.5	4	8:1	8	±0.15 mm per 300 mm	Rockwell C35	145,000	00000000	000000
M4	1	150	8	Metric Rounded Trapezoidal	9.5	15.5	5	8:1	8	±0.15 mm per 300 mm	Rockwell C35	145,000	00000000	000000

Round Nuts—Right-Hand Threaded

Acetal Plastic
	Thread Size	Thread Pitch, mm	Lg.	Dia.	No. of Thread Starts	Thread Type	Speed Ratio	Travel Distance per Turn, mm	Hardness	Tensile Strength, psi	Dynamic Thrust Load Cap.		Each
A	M8	2.5	15/32"	0.709"	4	Metric Rounded Trapezoidal	4:1	10	Durometer 74D	10,000	Not Rated	0000000	000000
A	M10	3	25/32"	0.866"	4	Metric Rounded Trapezoidal	4:1	12	Durometer 74D	10,000	Not Rated	0000000	00000
A	M12	2.5	15/16"	1.024"	2	Metric Rounded Trapezoidal	2:1	5	Durometer 74D	10,000	Not Rated	0000000	00000
A	M16	5	1 17/64"	1.417"	7	Metric Rounded Trapezoidal	7:1	35	Durometer 74D	10,000	Not Rated	0000000	00000
A	M20	5	1 37/64"	1.772"	4	Metric Rounded Trapezoidal	4:1	20	Durometer 74D	10,000	Not Rated	0000000	00000
A	M20	7.5	1 37/64"	1.772"	8	Metric Rounded Trapezoidal	8:1	60	Durometer 74D	10,000	Not Rated	0000000	00000

Externally Threaded Nuts—Right-Hand Threaded

												External Thread
	Thread Size	Thread Pitch, mm	Lg.	Wd.	Ht.	Dia.	Hex Wd.	No. of Thread Starts	Thread Type	Speed Ratio	Travel Distance per Turn, mm	Size	Lg.	Dynamic Thrust Load Cap., lbs.		Each
Acetal Plastic
B	M2	0.5	11/16"	__	__	0.297"	7/16"	2	Metric Rounded Trapezoidal	2:1	1	3/8"-24	3/16"	10	000000000	000000
B	M4	1.25	11/16"	__	__	0.297"	7/16"	8	Metric Rounded Trapezoidal	8:1	10	3/8"-24	3/16"	25	000000000	00000
B	M5	1.25	11/16"	__	__	0.297"	7/16"	4	Metric Rounded Trapezoidal	4:1	5	3/8"-24	3/16"	25	000000000	00000
B	M8	2	1"	__	__	0.548"	11/16"	2	Metric Rounded Trapezoidal	2:1	4	5/8"-18	1/4"	75	000000000	00000
PEEK Plastic
C	M2	0.4	5/16"	0.22"	0.197"	__	__	2	Metric Rounded Trapezoidal	2:1	0.75	M5	9/64"	2	00000000	00000
C	M2	0.4	5/16"	0.22"	0.197"	__	__	4	Metric Rounded Trapezoidal	4:1	1.5	M5	9/64"	2	00000000	00000
C	M2	0.4	5/16"	0.22"	0.197"	__	__	8	Metric Rounded Trapezoidal	8:1	3	M5	9/64"	2	00000000	00000
C	M3	0.5	13/32"	0.311"	0.276"	__	__	2	Metric Rounded Trapezoidal	2:1	1	M7	5/32"	4	00000000	00000
C	M3	0.5	13/32"	0.311"	0.276"	__	__	6	Metric Rounded Trapezoidal	6:1	3	M7	5/32"	4	00000000	00000
C	M4	1	1/2"	0.402"	0.354"	__	__	4	Metric Rounded Trapezoidal	4:1	4	M9	13/64"	4	00000000	00000
C	M4	1	1/2"	0.402"	0.354"	__	__	8	Metric Rounded Trapezoidal	8:1	8	M9	13/64"	10	00000000	00000

Flange Nuts—Right-Hand Threaded

					Flange
	Thread Size	Thread Pitch, mm	Lg.	Dia.	Dia.	Wd.	Ht.	Thick.	No. of Thread Starts	Thread Type	Speed Ratio	Travel Distance per Turn, mm	Bolt Circle Dia.	Dynamic Thrust Load Cap., lbs.		Each
Acetal Plastic
D	M2	0.5	1/2"	0.297"	__	3/4"	13/32"	1/8"	2	Metric Rounded Trapezoidal	2:1	1	39/64"	10	000000000	000000
D	M4	1.25	1/2"	0.297"	__	3/4"	13/32"	1/8"	8	Metric Rounded Trapezoidal	8:1	10	39/64"	25	000000000	00000
D	M5	1.25	1/2"	0.297"	__	3/4"	13/32"	1/8"	4	Metric Rounded Trapezoidal	4:1	5	39/64"	25	000000000	00000
E	M8	2	3/4"	0.548"	1 1/8"	__	__	3/16"	2	Metric Rounded Trapezoidal	2:1	4	7/8"	75	000000000	00000
F	M8	2.5	25/32"	0.787"	1 27/64"	__	__	5/16"	4	Metric Rounded Trapezoidal	4:1	10	1 7/64"	Not Rated	0000000	00000
F	M10	3	63/64"	0.984"	1 21/32"	__	__	25/64"	4	Metric Rounded Trapezoidal	4:1	12	1 11/32"	Not Rated	0000000	00000
F	M12	2.5	1 3/8"	1.102"	1 57/64"	__	__	15/32"	2	Metric Rounded Trapezoidal	2:1	5	1 1/2"	Not Rated	0000000	00000
F	M16	5	1 3/8"	1.102"	1 57/64"	__	__	15/32"	7	Metric Rounded Trapezoidal	7:1	35	1 1/2"	Not Rated	0000000	00000
F	M20	5	1 47/64"	1.26"	2 11/64"	__	__	15/32"	4	Metric Rounded Trapezoidal	4:1	20	1 49/64"	Not Rated	0000000	000000
F	M20	7.5	1 47/64"	1.26"	2 11/64"	__	__	15/32"	8	Metric Rounded Trapezoidal	8:1	60	1 49/64"	Not Rated	0000000	000000
PEEK Plastic
D	M2	0.4	9/32"	0.209"	__	15/32"	15/64"	5/64"	2	Metric Rounded Trapezoidal	2:1	0.75	11/32"	2	00000000	00000
D	M2	0.4	9/32"	0.209"	__	15/32"	15/64"	5/64"	4	Metric Rounded Trapezoidal	4:1	1.5	11/32"	2	00000000	00000
D	M2	0.4	9/32"	0.209"	__	15/32"	15/64"	5/64"	8	Metric Rounded Trapezoidal	8:1	3	11/32"	2	00000000	00000
D	M3	0.5	21/64"	0.295"	__	39/64"	5/16"	3/32"	2	Metric Rounded Trapezoidal	2:1	1	15/32"	4	00000000	00000
D	M3	0.5	21/64"	0.295"	__	39/64"	5/16"	3/32"	6	Metric Rounded Trapezoidal	6:1	3	15/32"	4	00000000	00000
D	M3	0.5	21/64"	0.295"	__	39/64"	5/16"	3/32"	12	Metric Rounded Trapezoidal	12:1	6	15/32"	4	00000000	00000
D	M4	1	13/32"	0.354"	__	3/4"	13/32"	1/8"	4	Metric Rounded Trapezoidal	4:1	4	19/32"	10	00000000	00000
D	M4	1	13/32"	0.354"	__	3/4"	13/32"	1/8"	8	Metric Rounded Trapezoidal	8:1	8	19/32"	10	00000000	00000
PEEK Plastic with Wear-Compensating Internal O-Ring
D	M2	0.4	5/16"	0.228"	__	15/32"	15/64"	5/64"	2	Metric Rounded Trapezoidal	2:1	0.75	11/32"	1	00000000	00000
D	M2	0.4	5/16"	0.228"	__	15/32"	15/64"	5/64"	4	Metric Rounded Trapezoidal	4:1	1.5	11/32"	1	00000000	00000
D	M2	0.4	5/16"	0.228"	__	15/32"	15/64"	5/64"	8	Metric Rounded Trapezoidal	8:1	3	11/32"	1	00000000	00000
D	M3	0.5	25/64"	0.315"	__	39/64"	5/16"	3/32"	2	Metric Rounded Trapezoidal	2:1	1	15/32"	2	00000000	00000
D	M3	0.5	25/64"	0.315"	__	39/64"	5/16"	3/32"	6	Metric Rounded Trapezoidal	6:1	3	15/32"	2	00000000	00000
D	M3	0.5	25/64"	0.315"	__	39/64"	5/16"	3/32"	12	Metric Rounded Trapezoidal	12:1	6	15/32"	2	00000000	00000
D	M4	1	31/64"	0.406"	__	3/4"	13/32"	1/8"	4	Metric Rounded Trapezoidal	4:1	4	19/32"	4	00000000	00000
D	M4	1	31/64"	0.406"	__	3/4"	13/32"	1/8"	8	Metric Rounded Trapezoidal	8:1	8	19/32"	4	00000000	00000

Fast-Travel Ultra-Precision Lead Screws and Nuts

Multiple thread channels (also known as thread starts) create faster linear travel than lead screws with a single thread start. Operating with less backlash (play) than Precision Acme Lead Screws and Nuts, these lead screws and nuts provide increased nut life and more reliable movement in automated systems. All components are corrosion resistant for use in harsh environments. To ensure compatibility, select components that have the same thread type, thread size, and number of thread starts.

Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.

For technical drawings and 3-D models, click on a part number.

Lead Screws—Right-Hand Threaded

303 Stainless Steel
Thread Size	Lg.	No. of Thread Starts	Thread Type	Speed Ratio	Travel Distance per Turn	Accuracy for Travel Distance per Turn	Hardness	Tensile Strength, psi		Each
9/64"-20.8	18"	2	Rounded Acme	2:1	0.096"	±0.0006" per in.	Brinell 160	90,000	0000000	000000
5/32"-21.3	18"	2	Acme	2:1	0.094"	±0.0006" per in.	Brinell 160	90,000	0000000	00000
3/16"-42.7	18"	16	Rounded Acme	16:1	0.375"	±0.0006" per in.	Brinell 160	90,000	0000000	00000
7/32"-20.8	9"	4	Rounded Acme	4:1	0.192"	±0.0006" per in.	Brinell 160	90,000	00000000	00000
7/32"-20.8	18"	4	Rounded Acme	4:1	0.192"	±0.0006" per in.	Brinell 160	90,000	0000000	00000
1/4"-8	3ft.	8	Rounded Acme	8:1	1"	±0.0006" per in.	Brinell 160	90,000	00000000	000000
1/4"-8	6ft.	8	Rounded Acme	8:1	1"	±0.0006" per in.	Brinell 160	90,000	0000000	000000
1/4"-16	3ft.	4	Rounded Acme	4:1	0.25"	±0.0006" per in.	Brinell 160	90,000	00000000	000000
1/4"-16	6ft.	4	Rounded Acme	4:1	0.25"	±0.0006" per in.	Brinell 160	90,000	0000000	000000
1/4"-20	3ft.	2	Rounded Acme	2:1	0.1"	±0.0006" per in.	Brinell 160	90,000	00000000	00000
1/4"-20	6ft.	2	Rounded Acme	2:1	0.1"	±0.0006" per in.	Brinell 160	90,000	00000000	000000
3/8"-5	3ft.	5	Rounded Acme	5:1	1"	±0.0006" per in.	Brinell 160	90,000	00000000	000000
3/8"-5	6ft.	5	Rounded Acme	5:1	1"	±0.0006" per in.	Brinell 160	90,000	0000000	000000
3/8"-8	3ft.	2	Rounded Acme	2:1	0.25"	±0.0006" per in.	Brinell 160	90,000	00000000	000000
3/8"-8	3ft.	4	Rounded Acme	4:1	0.5"	±0.0006" per in.	Brinell 160	90,000	00000000	000000
3/8"-8	6ft.	4	Rounded Acme	4:1	0.5"	±0.0006" per in.	Brinell 160	90,000	0000000	000000
3/8"-10	3ft.	2	Rounded Acme	2:1	0.2"	±0.0006" per in.	Brinell 160	90,000	00000000	000000
3/8"-10	6ft.	2	Rounded Acme	2:1	0.2"	±0.0006" per in.	Brinell 160	90,000	0000000	000000
3/8"-12	6ft.	3	Rounded Acme	3:1	0.25"	±0.0006" per in.	Brinell 160	90,000	00000000	000000
1/2"-8	3ft.	2	Rounded Acme	2:1	0.25"	±0.0006" per in.	Brinell 160	90,000	00000000	000000
1/2"-8	3ft.	4	Rounded Acme	4:1	0.5"	±0.0006" per in.	Brinell 160	90,000	00000000	000000
1/2"-8	3ft.	8	Rounded Acme	8:1	1"	±0.0006" per in.	Brinell 160	90,000	00000000	000000
1/2"-8	6ft.	2	Rounded Acme	2:1	0.25"	±0.0006" per in.	Brinell 160	90,000	00000000	000000
1/2"-8	6ft.	4	Rounded Acme	4:1	0.5"	±0.0006" per in.	Brinell 160	90,000	0000000	000000
1/2"-8	6ft.	8	Rounded Acme	8:1	1"	±0.0006" per in.	Brinell 160	90,000	0000000	000000
1/2"-10	3ft.	2	Rounded Acme	2:1	0.2"	±0.0006" per in.	Brinell 160	90,000	00000000	000000
1/2"-10	6ft.	2	Rounded Acme	2:1	0.2"	±0.0006" per in.	Brinell 160	90,000	0000000	000000
5/8"-6	3ft.	12	Rounded Acme	12:1	2"	±0.0006" per in.	Brinell 160	90,000	00000000	000000
5/8"-6	6ft.	12	Rounded Acme	12:1	2"	±0.0006" per in.	Brinell 160	90,000	00000000	000000
5/8"-8	3ft.	4	Rounded Acme	4:1	0.5"	±0.0006" per in.	Brinell 160	90,000	00000000	000000
5/8"-8	6ft.	4	Rounded Acme	4:1	0.5"	±0.0006" per in.	Brinell 160	90,000	00000000	000000
3/4"-8	3ft.	2	Rounded Acme	2:1	0.25"	±0.0006" per in.	Brinell 160	90,000	00000000	000000
3/4"-8	3ft.	8	Rounded Acme	8:1	1"	±0.0006" per in.	Brinell 160	90,000	00000000	000000
3/4"-8	6ft.	2	Rounded Acme	2:1	0.25"	±0.0006" per in.	Brinell 160	90,000	0000000	000000
3/4"-8	6ft.	8	Rounded Acme	8:1	1"	±0.0006" per in.	Brinell 160	90,000	00000000	000000

Flange Nuts—Right-Hand Threaded

Flange nuts with wear-compensating internal O-ring or wear-compensating spring maintain a tight fit even when their threads begin to wear. They resist backlash to maintain accuracy over time, which is important in applications such as 3D printing and robotics.

				Flange
	Thread Size	Lg.	Dia.	Dia.	Wd.	Ht.	Thick.	No. of Thread Starts	Thread Type	Speed Ratio	Travel Distance per Turn	Mounting Hole Ctr.-to-Ctr.	Bolt Circle Dia.	Tensile Strength, psi	Dynamic Thrust Load Cap., lbs.		Each
Acetal Plastic
A	9/64"-20.8	1/2"	0.406"	__	3/4"	13/32"	1/8"	2	Rounded Acme	2:1	0.096"	39/64"	__	Not Rated	25	0000000	000000
A	5/32"-21.3	1/2"	0.406"	__	3/4"	13/32"	1/8"	2	Rounded Acme	2:1	0.094"	39/64"	__	Not Rated	25	0000000	00000
A	3/16"-42.7	1/2"	0.406"	__	3/4"	13/32"	1/8"	16	Rounded Acme	16:1	0.375"	39/64"	__	Not Rated	25	0000000	00000
A	7/32"-20.8	1/2"	0.406"	__	3/4"	13/32"	1/8"	4	Rounded Acme	4:1	0.192"	39/64"	__	Not Rated	25	0000000	00000
B	1/4"-8	1"	0.5"	1"	__	__	3/16"	8	Rounded Acme	8:1	1"	__	3/4"	9,700	50	0000000	00000
B	1/4"-16	1"	0.5"	1"	__	__	3/16"	4	Rounded Acme	4:1	0.25"	__	3/4"	9,700	50	0000000	00000
B	1/4"-20	1"	0.5"	1"	__	__	3/16"	2	Rounded Acme	2:1	0.1"	__	3/4"	9,700	50	00000000	00000
B	3/8"-5	1"	0.625"	1 7/64"	__	__	3/16"	5	Rounded Acme	5:1	1"	__	7/8"	9,700	75	0000000	00000
B	3/8"-8	1"	0.625"	1 7/64"	__	__	3/16"	4	Rounded Acme	4:1	0.5"	__	7/8"	9,700	75	0000000	00000
B	3/8"-10	1"	0.625"	1 7/64"	__	__	3/16"	2	Rounded Acme	2:1	0.2"	__	7/8"	9,700	75	0000000	00000
B	3/8"-12	1"	0.625"	1 7/64"	__	__	3/16"	3	Rounded Acme	3:1	0.25"	__	7/8"	9,700	75	00000000	00000
B	1/2"-8	1 1/2"	0.75"	1 1/2"	__	__	3/16"	2	Rounded Acme	2:1	0.25"	__	1 1/8"	9,700	150	00000000	00000
B	1/2"-8	1 1/2"	0.75"	1 1/2"	__	__	3/16"	4	Rounded Acme	4:1	0.5"	__	1 1/8"	9,700	150	0000000	00000
B	1/2"-8	1 1/2"	0.75"	1 1/2"	__	__	3/16"	8	Rounded Acme	8:1	1"	__	1 1/8"	9,700	150	0000000	00000
B	1/2"-10	1 1/2"	0.75"	1 1/2"	__	__	3/16"	2	Rounded Acme	2:1	0.2"	__	1 1/8"	9,700	150	0000000	00000
B	5/8"-6	1 1/2"	0.875"	1 1/2"	__	__	3/16"	12	Rounded Acme	12:1	2"	__	1 3/16"	9,700	220	00000000	00000
B	5/8"-8	1 1/2"	0.875"	1 1/2"	__	__	3/16"	4	Rounded Acme	4:1	0.5"	__	1 3/16"	9,700	220	00000000	00000
B	3/4"-8	2"	1.125"	1 3/4"	__	__	1/4"	8	Rounded Acme	8:1	1"	__	1 7/16"	9,000	350	00000000	00000
B	3/4"-8	2"	1.125"	1 51/64"	__	__	1/4"	2	Rounded Acme	2:1	0.25"	__	1 7/16"	9,700	350	0000000	00000
Acetal Plastic with Wear-Compensating Internal O-Ring
A	9/64"-20.8	1/2"	0.406"	__	3/4"	13/32"	1/8"	2	Rounded Acme	2:1	0.096"	39/64"	__	Not Rated	5	0000000	00000
A	5/32"-21.3	1/2"	0.406"	__	3/4"	13/32"	1/8"	2	Rounded Acme	2:1	0.094"	39/64"	__	Not Rated	5	0000000	00000
A	3/16"-42.7	1/2"	0.406"	__	3/4"	13/32"	1/8"	16	Rounded Acme	16:1	0.375"	39/64"	__	Not Rated	5	0000000	00000
A	7/32"-20.8	1/2"	0.406"	__	3/4"	13/32"	1/8"	4	Rounded Acme	4:1	0.192"	39/64"	__	Not Rated	5	0000000	00000
Acetal Plastic with Wear-Compensating Spring
B	3/4"-8	2 45/64"	1.563"	2 13/32"	__	__	5/16"	2	Rounded Acme	2:1	0.25"	__	2"	9,700	150	0000000	000000
C	1/4"-8	1"	0.5"	1"	__	__	3/16"	8	Rounded Acme	8:1	1"	__	3/4"	9,700	5	0000000	00000
C	1/4"-16	1"	0.5"	1"	__	__	3/16"	4	Rounded Acme	4:1	0.25"	__	3/4"	9,700	5	0000000	00000
C	1/4"-20	1"	0.5"	1"	__	__	3/16"	2	Rounded Acme	2:1	0.1"	__	3/4"	9,700	5	00000000	00000
C	3/8"-5	1 29/32"	0.703"	1 1/2"	__	__	3/16"	5	Rounded Acme	5:1	1"	__	1 1/8"	9,700	10	0000000	00000
C	3/8"-8	1 29/32"	0.703"	1 1/2"	__	__	3/16"	4	Rounded Acme	4:1	0.5"	__	1 1/8"	9,700	10	0000000	00000
C	3/8"-10	1 29/32"	0.703"	1 1/2"	__	__	3/16"	2	Rounded Acme	2:1	0.2"	__	1 1/8"	9,700	10	0000000	00000
C	3/8"-12	1 29/32"	0.703"	1 1/2"	__	__	3/16"	3	Rounded Acme	3:1	0.25"	__	1 1/8"	9,700	10	00000000	00000
C	1/2"-8	2"	0.891"	1 39/64"	__	__	17/64"	2	Rounded Acme	2:1	0.25"	__	1 1/4"	9,700	25	00000000	00000
C	1/2"-8	2"	0.891"	1 39/64"	__	__	17/64"	4	Rounded Acme	4:1	0.5"	__	1 1/4"	9,700	25	0000000	00000
C	1/2"-8	2"	0.891"	1 39/64"	__	__	17/64"	8	Rounded Acme	8:1	1"	__	1 1/4"	9,700	25	0000000	00000
C	1/2"-10	2"	0.891"	1 39/64"	__	__	17/64"	2	Rounded Acme	2:1	0.2"	__	1 1/4"	9,700	25	0000000	00000
C	5/8"-6	2"	1.063"	1 51/64"	__	__	17/64"	12	Rounded Acme	12:1	2"	__	1 3/8"	9,700	35	00000000	00000
C	5/8"-8	2"	1.063"	1 51/64"	__	__	17/64"	4	Rounded Acme	4:1	0.5"	__	1 3/8"	9,700	35	00000000	00000

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Selecting Compatible Lead Screws and Nuts

Fast-Travel Precision Acme Lead Screws and Nuts

Precision Acme Lead Screws and Nuts

Metric Fast-Travel Ultra-Precision Lead Screws and Nuts

Fast-Travel Ultra-Precision Lead Screws and Nuts