Selecting Compatible Lead Screws and Nuts
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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.
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.
| 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 | ||
Acetal Plastic | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 |
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 | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 |
Metric Ultra-Precision Lead Screws and Nuts
Operating with less backlash (play) than Metric Precision Acme Lead Screws and Nuts, these provide increased nut life and more reliable movement in automated systems. 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, select components that have the same thread size, thread type, thread size, thread pitch, and number of thread starts.
Flange nuts with wear-compensating internal O-ring maintain a tight fit even when their threads begin to wear. They resist backlash to maintain accuracy over time, which is important in positioning applications such as 3D printing and robotics.
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.
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 | Pitch | Lg. | Dynamic Thrust Load Cap., lbs. | Each | ||
Acetal Plastic | |||||||||||||||||
| A | M2 | 0.5 | 11/16" | __ | __ | 0.297" | 7/16" | 1 | Metric Rounded Trapezoidal | 1:1 | 0.5 | 3/8"-24 | __ | 3/16" | 10 | 0000000 | 000000 |
| A | M4 | 0.3 | 11/16" | __ | __ | 0.297" | 7/16" | 1 | Metric Rounded Trapezoidal | 1:1 | 0.3 | 3/8"-24 | __ | 3/16" | 25 | 0000000 | 00000 |
| A | M8 | 1.5 | 1" | __ | __ | 0.548" | 11/16" | 1 | Metric Rounded Trapezoidal | 1:1 | 1.5 | 5/8"-18 | __ | 1/4" | 75 | 0000000 | 00000 |
PEEK Plastic | |||||||||||||||||
| B | M2 | 0.4 | 5/16" | 0.22" | 0.197" | __ | __ | 1 | Metric Rounded Trapezoidal | 1:1 | 0.375 | M5 | 0.8mm | 9/64" | 2 | 000000000 | 00000 |
| B | M3 | 0.5 | 13/32" | 0.311" | 0.276" | __ | __ | 1 | Metric Rounded Trapezoidal | 1:1 | 0.5 | M7 | 0.75mm | 5/32" | 5 | 000000000 | 00000 |
| B | M4 | 1 | 1/2" | 0.402" | 0.354" | __ | __ | 1 | Metric Rounded Trapezoidal | 1:1 | 1 | M9 | 1mm | 13/64" | 10 | 000000000 | 00000 |
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 | ||||||||||||||||
| C | M2 | 0.5 | 1/2" | 0.297" | __ | 3/4" | 13/32" | 1/8" | 1 | Metric Rounded Trapezoidal | 1:1 | 0.5 | 39/64" | 10 | 0000000 | 000000 |
| C | M4 | 0.3 | 1/2" | 0.297" | __ | 3/4" | 13/32" | 1/8" | 1 | Metric Rounded Trapezoidal | 1:1 | 0.3 | 39/64" | 25 | 0000000 | 00000 |
| D | M8 | 1.5 | 3/4" | 0.548" | 1 1/8" | __ | __ | 3/16" | 1 | Metric Rounded Trapezoidal | 1:1 | 1.5 | 7/8" | 75 | 0000000 | 00000 |
PEEK Plastic | ||||||||||||||||
| C | M2 | 0.4 | 9/32" | 0.209" | __ | 15/32" | 15/64" | 5/64" | 1 | Metric Rounded Trapezoidal | 1:1 | 0.375 | 11/32" | 2 | 000000000 | 00000 |
| C | M3 | 0.5 | 21/64" | 0.295" | __ | 39/64" | 5/16" | 3/32" | 1 | Metric Rounded Trapezoidal | 1:1 | 0.5 | 15/32" | 5 | 000000000 | 00000 |
| C | M4 | 1 | 13/32" | 0.354" | __ | 3/4" | 13/32" | 1/8" | 1 | Metric Rounded Trapezoidal | 1:1 | 1 | 19/32" | 10 | 000000000 | 00000 |
PEEK Plastic with Wear-Compensating Internal O-Ring | ||||||||||||||||
| C | M2 | 0.4 | 5/16" | 0.228" | __ | 15/32" | 15/64" | 5/64" | 1 | Metric Rounded Trapezoidal | 1:1 | 0.375 | 11/32" | 1 | 000000000 | 000000 |
| C | M3 | 0.5 | 25/64" | 0.315" | __ | 39/64" | 5/16" | 3/32" | 1 | Metric Rounded Trapezoidal | 1:1 | 0.5 | 15/32" | 2 | 000000000 | 000000 |
| C | M4 | 1 | 31/64" | 0.406" | __ | 3/4" | 13/32" | 1/8" | 1 | Metric Rounded Trapezoidal | 1:1 | 1 | 19/32" | 5 | 000000000 | 000000 |