No-Go Ring Gauges | McMaster-Carr

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Ring Gauges for Outside Diameters

Check the outside diameter of shafts, rods, and other cylindrical objects to determine whether they’re in tolerance.

If your part can pass through a go gauge but cannot pass through a no-go gauge, it is within tolerance.

No-go gauges check the minimum outside diameter.

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

					No-Go Gauges
Choose a Size	Increment	Surface Smoothness (RMS), microinch	Hardness	Material	Gauge Tolerance		Each
Class Z
0.1501" to 0.2400"	0.0001"	8	Rockwell C60	Tool Steel	0" to 0.0001"	0000000	0000000
0.2401" to 0.3650"	0.0001"	8	Rockwell C60	Tool Steel	0" to 0.0001"	0000000	000000
0.3651" to 0.5100"	0.0001"	8	Rockwell C60	Tool Steel	0" to 0.0001"	0000000	000000
0.5101" to 0.8250"	0.0001"	8	Rockwell C60	Tool Steel	0" to 0.0001"	0000000	000000
0.8251" to 1.1350"	0.0001"	8	Rockwell C60	Tool Steel	0" to 0.00012"	0000000	000000
1.1351" to 1.5100"	0.0001"	8	Rockwell C60	Tool Steel	0" to 0.00012"	0000000	000000
1.5101" to 2.0100"	0.0001"	8	Rockwell C60	Tool Steel	0" to 0.00016"	0000000	000000
2.0101" to 2.5100"	0.0001"	8	Rockwell C60	Tool Steel	0" to 0.00016"	0000000	000000
Class X
0.1501" to 0.2400"	0.0001"	4	Rockwell C60	Tool Steel	0" to 0.00004"	0000000	000000
0.2401" to 0.3650"	0.0001"	4	Rockwell C60	Tool Steel	0" to 0.00004"	0000000	000000
0.3651" to 0.5100"	0.0001"	4	Rockwell C60	Tool Steel	0" to 0.00004"	0000000	000000
0.5101" to 0.8250"	0.0001"	4	Rockwell C60	Tool Steel	0" to 0.00004"	0000000	000000
0.8251" to 1.1350"	0.0001"	4	Rockwell C60	Tool Steel	0" to 0.00006"	0000000	000000
1.1351" to 1.5100"	0.0001"	4	Rockwell C60	Tool Steel	0" to 0.00006"	0000000	000000
1.5101" to 2.0100"	0.0001"	4	Rockwell C60	Tool Steel	0" to 0.00008"	0000000	000000
2.0101" to 2.5100"	0.0001"	4	Rockwell C60	Tool Steel	0" to 0.00008"	0000000	000000

Threaded Ring Gauges with Calibration Certificate

Not only were these gauges calibrated in a lab, but they also come with a certificate that's traceable to NIST. The certificate, sometimes called a test report and long form certificate, details the tested measurements. They’re for checking a part’s external threads to ensure they fall within tolerance.

A part is within tolerance if it’s easy to thread a go gauge onto the part but difficult to thread a no-go gauge more than two turns. Inspect faster by holding more than one ring gauge with a threaded ring gauge holder.

No-go gauges check the minimum external thread size.

Threads have different classes of fit. Thread fit designates the tightness or looseness of the mating threads. For example, inch threads with a 3A fit have tighter tolerances than threads with a 2A fit.

Inch—Class X

					No-Go Gauge
Thread Size	Thread Type	Thread Direction	Hardness	Material	Pitch Dia. Tolerance		Each
For Thread Fit Class 2A
0-80	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0002"	00000000	0000000
1-64	UNC	Right Hand	Rockwell C60	Tool Steel	0" to 0.0002"	00000000	000000
1-72	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0002"	00000000	000000
2-56	UNC	Right Hand	Rockwell C60	Tool Steel	0" to 0.0002"	00000000	000000
2-64	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0002"	00000000	000000
3-48	UNC	Right Hand	Rockwell C60	Tool Steel	0" to 0.0002"	00000000	000000
3-56	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0002"	00000000	000000
4-40	UNC	Right Hand	Rockwell C60	Tool Steel	0" to 0.0002"	00000000	000000
4-48	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0002"	00000000	000000
5-40	UNC	Right Hand	Rockwell C60	Tool Steel	0" to 0.0002"	00000000	000000
5-44	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0002"	00000000	000000
6-32	UNC	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
6-40	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0002"	00000000	000000
8-32	UNC	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
8-36	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0002"	00000000	000000
10-24	UNC	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
10-32	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
12-24	UNC	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
12-28	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
12-32	UNEF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
1/4"-20	UNC	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
1/4"-28	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
1/4"-32	UNEF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
5/16"-18	UNC	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
5/16"-24	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
5/16"-32	UNEF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
3/8"-16	UNC	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
3/8"-24	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
3/8"-32	UNEF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
7/16"-14	UNC	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
7/16"-20	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
7/16"-28	UNEF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
1/2"-13	UNC	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
1/2"-20	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
1/2"-28	UNEF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
9/16"-12	UNC	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
9/16"-18	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
9/16"-24	UNEF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
5/8"-11	UNC	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
5/8"-18	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
5/8"-24	UNEF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
11/16"-24	UNEF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
3/4"-10	UNC	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
3/4"-16	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
3/4"-20	UNEF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
7/8"-9	UNC	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
7/8"-14	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
7/8"-20	UNEF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
1"-8	UNC	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
1"-12	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
1"-14	UNS	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
1"-20	UNEF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
1 1/8"-7	UNC	Right Hand	Rockwell C60	Tool Steel	0" to 0.0004"	00000000	000000
1 1/8"-12	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
1 1/4"-7	UNC	Right Hand	Rockwell C60	Tool Steel	0" to 0.0004"	00000000	000000
1 1/4"-12	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
1 3/8"-6	UNC	Right Hand	Rockwell C60	Tool Steel	0" to 0.0004"	00000000	000000
1 3/8"-12	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
1 1/2"-6	UNC	Right Hand	Rockwell C60	Tool Steel	0" to 0.0004"	00000000	000000
1 1/2"-12	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
For Thread Fit Class 3A
0-80	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0002"	00000000	000000
1-72	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0002"	00000000	000000
2-56	UNC	Right Hand	Rockwell C60	Tool Steel	0" to 0.0002"	00000000	000000
2-64	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0002"	00000000	000000
3-56	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0002"	00000000	000000
4-40	UNC	Right Hand	Rockwell C60	Tool Steel	0" to 0.0002"	00000000	000000
4-48	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0002"	00000000	000000
5-40	UNC	Right Hand	Rockwell C60	Tool Steel	0" to 0.0002"	00000000	000000
5-44	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0002"	00000000	000000
6-32	UNC	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
6-40	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0002"	00000000	000000
8-32	UNC	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
8-36	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0002"	00000000	000000
10-24	UNC	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
10-32	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
12-28	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
12-32	UNEF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
1/4"-20	UNC	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
1/4"-28	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
1/4"-32	UNEF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
5/16"-18	UNC	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
5/16"-24	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
5/16"-32	UNEF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
3/8"-16	UNC	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
3/8"-24	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
3/8"-32	UNEF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
7/16"-20	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
7/16"-28	UNEF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
1/2"-13	UNC	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
1/2"-20	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
1/2"-28	UNEF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
9/16"-18	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
9/16"-24	UNEF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
5/8"-11	UNC	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
5/8"-18	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
5/8"-24	UNEF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
11/16"-24	UNEF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
3/4"-10	UNC	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
3/4"-16	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
3/4"-20	UNEF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
7/8"-9	UNC	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
7/8"-14	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
7/8"-20	UNEF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
1"-12	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
1"-14	UNS	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
1 1/8"-12	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
1 1/4"-12	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
1 3/8"-12	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000
1 1/2"-6	UNC	Right Hand	Rockwell C60	Tool Steel	0" to 0.0004"	00000000	000000
1 1/2"-12	UNF	Right Hand	Rockwell C60	Tool Steel	0" to 0.0003"	00000000	000000

Metric—Class X

					No-Go Gauge
Thread Size	Pitch	Thread Direction	Hardness	Material	Pitch Dia. Tolerance		Each
For Thread Fit Class 6g
M1.6	0.35 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.005 mm	00000000	0000000
M2	0.4 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.005 mm	00000000	000000
M2.2	0.45 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.005 mm	00000000	000000
M2.5	0.45 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.005 mm	00000000	000000
M3	0.5 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.005 mm	00000000	000000
M3.5	0.6 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.005 mm	00000000	000000
M4	0.7 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.005 mm	00000000	000000
M4.5	0.75 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M5	0.5 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.005 mm	00000000	000000
M5	0.8 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M6	0.75 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M6	1 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M7	1 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M8	0.75 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M8	1 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M8	1.25 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M9	1 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M9	1.25 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M10	1 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M10	1.25 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M10	1.5 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M11	1 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M11	1.5 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M12	1 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M12	1.25 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M12	1.5 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M12	1.75 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M14	1 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M14	1.25 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M14	1.5 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M14	2 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M16	1 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M16	1.5 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M16	2 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M18	1 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M18	1.5 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M18	2.5 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M20	1 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M20	1.5 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M20	2.5 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M22	1.5 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M22	2.5 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M24	1.5 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M24	2 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M24	3 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M26	1.5 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M27	2 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M27	3 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M30	1.5 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M30	2 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M30	3.5 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M33	2 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M33	3.5 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M35	1.5 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M36	1.5 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M36	2 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000
M36	4 mm	Right Hand	Rockwell C60	Tool Steel	0 mm to 0.008 mm	00000000	000000

Threaded Ring Gauges

Check a part’s external threads to make sure they fall within tolerance. You can use these for bolts, threaded rods, bits, and more. All gauges come with a manufacturer’s certificate of accuracy, also known as a certificate of compliance or a short form certification, that verifies the thread sizes are within tolerance.

The part is within tolerance if it’s easy to thread a go gauge onto, but difficult to thread a no-go gauge more than two turns. Use a threaded ring gauge holder to keep two gauges on hand at once for faster inspection.

No-go gauges check the minimum external thread size.

Inch

						No-Go Gauge
Thread Size	Thread Type	Hardness	Material	Choose a For Thread Fit	Thread Direction	Pitch Dia. Tolerance		Each
Class X
0-80	UNF	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0002"	00000000	0000000
1-64	UNC	Rockwell C60	Tool Steel	Class 2A	Right Hand	0" to 0.0002"	00000000	000000
1-72	UNF	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0002"	00000000	000000
2-56	UNC	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0002"	00000000	000000
2-64	UNF	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0002"	00000000	000000
3-48	UNC	Rockwell C60	Tool Steel	Class 2A	Right Hand	0" to 0.0002"	00000000	000000
3-56	UNF	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0002"	00000000	000000
4-40	UNC	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0002"	00000000	000000
4-48	UNF	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0002"	00000000	000000
5-40	UNC	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0002"	00000000	000000
5-44	UNF	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0002"	00000000	000000
6-32	UNC	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0003"	00000000	000000
6-40	UNF	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0002"	00000000	000000
8-32	UNC	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0003"	00000000	000000
8-36	UNF	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0002"	00000000	000000
10-24	UNC	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0003"	00000000	000000
10-32	UNF	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0003"	00000000	000000
12-24	UNC	Rockwell C60	Tool Steel	Class 2A	Right Hand	0" to 0.0003"	00000000	000000
12-28	UNF	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0003"	00000000	000000
12-32	UNEF	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0003"	00000000	000000
1/4"-20	UNC	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0003"	00000000	000000
1/4"-28	UNF	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0003"	00000000	000000
1/4"-32	UNEF	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0003"	00000000	000000
5/16"-18	UNC	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0003"	00000000	000000
5/16"-24	UNF	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0003"	00000000	000000
5/16"-32	UNEF	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0003"	00000000	000000
3/8"-16	UNC	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0003"	00000000	000000
3/8"-24	UNF	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0003"	00000000	000000
3/8"-32	UNEF	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0003"	00000000	000000
7/16"-14	UNC	Rockwell C60	Tool Steel	Class 2A	Right Hand	0" to 0.0003"	00000000	000000
7/16"-20	UNF	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0003"	00000000	000000
7/16"-28	UNEF	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0003"	00000000	000000
1/2"-13	UNC	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0003"	00000000	000000
1/2"-20	UNF	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0003"	00000000	000000
1/2"-28	UNEF	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0003"	00000000	000000
9/16"-12	UNC	Rockwell C60	Tool Steel	Class 2A	Right Hand	0" to 0.0003"	00000000	000000
9/16"-18	UNF	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0003"	00000000	000000
9/16"-24	UNEF	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0003"	00000000	000000
5/8"-11	UNC	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0003"	00000000	000000
5/8"-18	UNF	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0003"	00000000	000000
5/8"-24	UNEF	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0003"	00000000	000000
11/16"-24	UNEF	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0003"	00000000	000000
3/4"-10	UNC	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0003"	00000000	000000
3/4"-16	UNF	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0003"	00000000	000000
3/4"-20	UNEF	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0003"	00000000	000000
7/8"-9	UNC	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0003"	00000000	000000
7/8"-14	UNF	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0003"	00000000	000000
7/8"-20	UNEF	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0003"	00000000	000000
1"-8	UNC	Rockwell C60	Tool Steel	Class 2A	Right Hand	0" to 0.0004"	00000000	000000
1"-12	UNF	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0003"	00000000	000000
1"-14	UNS	Rockwell C60	Tool Steel	Class 3A	Right Hand	0" to 0.0003"	00000000	000000
1"-20	UNEF	Rockwell C60	Tool Steel	Class 2A	Right Hand	0" to 0.0003"	00000000	000000
1 1/8"-7	UNC	Rockwell C60	Tool Steel	Class 2A	Right Hand	0" to 0.0004"	00000000	000000
1 1/8"-12	UNF	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0003"	00000000	000000
1 1/4"-7	UNC	Rockwell C60	Tool Steel	Class 2A	Right Hand	0" to 0.0004"	00000000	000000
1 1/4"-12	UNF	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0003"	00000000	000000
1 1/2"-6	UNC	Rockwell C60	Tool Steel	Class 2A	Right Hand	0" to 0.0004"	00000000	000000
1 1/2"-12	UNF	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0003"	00000000	000000
1 3/8"-6	UNC	Rockwell C60	Tool Steel	Class 2A	Right Hand	0" to 0.0004"	00000000	000000
1 3/8"-12	UNF	Rockwell C60	Tool Steel	Class 2A, Class 3A	Right Hand	0" to 0.0003"	00000000	000000

Metric

						No-Go Gauge
Thread Size	Pitch	Hardness	Material	For Thread Fit	Thread Direction	Pitch Dia. Tolerance		Each
Class X
M1.6	0.35 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.005 mm	000000000	0000000
M2	0.4 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.005 mm	000000000	000000
M2.2	0.45 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.005 mm	000000000	000000
M2.5	0.45 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.005 mm	000000000	000000
M3	0.5 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.005 mm	000000000	000000
M3.5	0.6 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.005 mm	000000000	000000
M4	0.7 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.005 mm	000000000	000000
M4.5	0.75 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M5	0.5 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.005 mm	000000000	000000
M5	0.8 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M6	0.75 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M6	1 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M7	1 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M8	0.75 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M8	1 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M8	1.25 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M9	1 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M9	1.25 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M10	1 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M10	1.25 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M10	1.5 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M11	1 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M11	1.5 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M12	1 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M12	1.25 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M12	1.5 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M12	1.75 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M14	1 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M14	1.25 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M14	1.5 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M14	2 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M16	1 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M16	1.5 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M16	2 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M18	1 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M18	1.5 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M18	2.5 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M20	1 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M20	1.5 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M20	2.5 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M22	1.5 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M22	2.5 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M24	1.5 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M24	2 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M24	3 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M26	1.5 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M27	2 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M27	3 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M30	1.5 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M30	2 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M30	3.5 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M33	2 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M33	3.5 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M35	1.5 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M36	1.5 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M36	2 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000
M36	4 mm	Rockwell C60	Tool Steel	Class 6g	Right Hand	0 mm to 0.008 mm	000000000	000000