Metric Plug Gauges | McMaster-Carr

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179 Products

Metric Class Z Plug Gauges

These metric Class Z plug gauges are used for precision go/no-go measuring of hole sizes and depths, checking hole location and distance, and setting micrometers. They’re also known as pin gauges. All come with a certificate of accuracy traceable to NIST that states they've passed a test for accuracy.

If a go gauge can enter the hole and a no-go gauge is unable to enter, the hole is within tolerance.

Go gauges check the minimum hole diameter.

No-go gauges check the maximum hole diameter.

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

Go Gauge
Choose a Plug Gauge Size	Increment	Length	Surface Smoothness (RMS), microinch	Hardness	Material	Plug Gauge Tolerance		Each
0.22 mm to 1.51 mm	0.01 mm	2"	8	Rockwell C60	Tool Steel	0 mm to 0.0025 mm	000000	00000
1.52 mm to 12.71 mm	0.01 mm	2"	8	Rockwell C60	Tool Steel	0 mm to 0.0025 mm	000000	0000
12.72 mm to 15.31 mm	0.01 mm	2"	8	Rockwell C60	Tool Steel	0 mm to 0.0025 mm	000000	0000
15.32 mm to 17.81 mm	0.01 mm	2"	8	Rockwell C60	Tool Steel	0 mm to 0.0025 mm	000000	00000
17.82 mm to 20.37 mm	0.01 mm	2"	8	Rockwell C60	Tool Steel	0 mm to 0.0025 mm	000000	00000
20.38 mm to 22.05 mm	0.01 mm	2"	8	Rockwell C60	Tool Steel	0 mm to 0.0025 mm	000000	00000
22.06 mm to 23.73 mm	0.01 mm	2"	8	Rockwell C60	Tool Steel	0 mm to 0.0025 mm	000000	00000
23.74 mm to 25.41 mm	0.01 mm	2"	8	Rockwell C60	Tool Steel	0 mm to 0.0025 mm	000000	00000
No-Go Gauge
0.22 mm to 1.51 mm	0.01 mm	2"	8	Rockwell C60	Tool Steel	-0.0025 mm to 0 mm	000000	0000
1.52 mm to 12.71 mm	0.01 mm	2"	8	Rockwell C60	Tool Steel	-0.0025 mm to 0 mm	0000000	0000
12.72 mm to 15.31 mm	0.01 mm	2"	8	Rockwell C60	Tool Steel	-0.0025 mm to 0 mm	0000000	0000
15.32 mm to 17.81 mm	0.01 mm	2"	8	Rockwell C60	Tool Steel	-0.0025 mm to 0 mm	0000000	00000
17.82 mm to 20.37 mm	0.01 mm	2"	8	Rockwell C60	Tool Steel	-0.0025 mm to 0 mm	0000000	00000
20.38 mm to 22.05 mm	0.01 mm	2"	8	Rockwell C60	Tool Steel	-0.0025 mm to 0 mm	0000000	00000
22.06 mm to 23.73 mm	0.01 mm	2"	8	Rockwell C60	Tool Steel	-0.0025 mm to 0 mm	0000000	00000
23.74 mm to 25.41 mm	0.01 mm	2"	8	Rockwell C60	Tool Steel	-0.0025 mm to 0 mm	0000000	00000

Metric Class X Plug Gauges

Use these metric Class X plug gauges for precision go/no-go measuring of hole sizes and depths, checking hole location and distance, and setting micrometers. They’re also called pin gauges. All come with a certificate of accuracy traceable to NIST that states they've passed a test for accuracy.

If a go gauge can enter the hole and a no-go gauge is unable to enter, the hole is within tolerance.

Go gauges check the minimum hole diameter.

No-go gauges check the maximum hole diameter.

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

Go Gauge
Choose a Size	Increment	Length	Surface Smoothness (RMS)	Hardness	Material	Gauge Tolerance		Each
0.101mm to 0.381mm	0.001mm	2"	4 microinch	Rockwell C60	Tool Steel	0mm to 0.001mm	000000	000000
0.382mm to 0.762mm	0.001mm	2"	4 microinch	Rockwell C60	Tool Steel	0mm to 0.001mm	000000	00000
0.763mm to 1.905mm	0.001mm	2"	4 microinch	Rockwell C60	Tool Steel	0mm to 0.001mm	000000	00000
1.906mm to 4.572mm	0.001mm	2"	4 microinch	Rockwell C60	Tool Steel	0mm to 0.001mm	000000	00000
4.573mm to 7.137mm	0.001mm	2"	4 microinch	Rockwell C60	Tool Steel	0mm to 0.001mm	0000000	00000
7.138mm to 10.312mm	0.001mm	2"	4 microinch	Rockwell C60	Tool Steel	0mm to 0.001mm	0000000	00000
10.313mm to 12.954mm	0.001mm	2"	4 microinch	Rockwell C60	Tool Steel	0mm to 0.001mm	0000000	00000
12.955mm to 16.129mm	0.001mm	2"	4 microinch	Rockwell C60	Tool Steel	0mm to 0.001mm	000000	00000
16.130mm to 19.304mm	0.001mm	2"	4 microinch	Rockwell C60	Tool Steel	0mm to 0.001mm	000000	00000
19.305mm to 20.960mm 20.963mm to 25.654mm	0.001mm	2"	4 microinch	Rockwell C60	Tool Steel	0mm to 0.001mm 0mm to 0.0015mm	000000	00000
No-Go Gauge
0.101mm to 0.381mm	0.001mm	2"	4 microinch	Rockwell C60	Tool Steel	-0.001mm to 0mm	000000	00000
0.382mm to 0.762mm	0.001mm	2"	4 microinch	Rockwell C60	Tool Steel	-0.001mm to 0mm	000000	00000
0.763mm to 1.905mm	0.001mm	2"	4 microinch	Rockwell C60	Tool Steel	-0.001mm to 0mm	0000000	00000
1.906mm to 4.572mm	0.001mm	2"	4 microinch	Rockwell C60	Tool Steel	-0.001mm to 0mm	0000000	00000
4.573mm to 7.137mm	0.001mm	2"	4 microinch	Rockwell C60	Tool Steel	-0.001mm to 0mm	0000000	00000
7.138mm to 10.312mm	0.001mm	2"	4 microinch	Rockwell C60	Tool Steel	-0.001mm to 0mm	0000000	00000
10.313mm to 12.954mm	0.001mm	2"	4 microinch	Rockwell C60	Tool Steel	-0.001mm to 0mm	0000000	00000
12.955mm to 16.129mm	0.001mm	2"	4 microinch	Rockwell C60	Tool Steel	-0.001mm to 0mm	0000000	00000
16.130mm to 19.304mm	0.001mm	2"	4 microinch	Rockwell C60	Tool Steel	-0.001mm to 0mm	0000000	00000
19.305mm to 20.960mm 20.963mm to 25.654mm	0.001mm	2"	4 microinch	Rockwell C60	Tool Steel	-0.001mm to 0mm -0.0015mm to 0mm	0000000	00000

Plug Gauges with Handle

Take go and no-go measurements with the same tool. These gauges have a go gauge on one end, a no-go gauge on the other end, and a handle with bushings. They are used for precision go/no-go measuring of hole sizes and depths, checking hole location and distance, and setting micrometers. All come with a certificate of accuracy traceable to NIST.

Check the minimum hole diameter with the go gauge end, and check the maximum hole diameter with the no-go gauge end. If the go gauge enters the hole and the no-go gauge is unable to enter, the hole is within tolerance.

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

Metric—Class Z

Choose a Plug Gauge Size	Increment	Go Plug Gauge Tolerance	No-Go Plug Gauge Size Tolerance	Lg.	Surface Smoothness (RMS), microinch	Hardness	Material	Specifications Met		Each
0.2200 mm to 1.9100 mm	0.01 mm	0 mm to 0.0025 mm	-0.0025 mm to 0 mm	5 1/4"	8	Rockwell C60	Tool Steel	ASME B89.1.5	00000000	000000
1.9200 mm to 4.5700 mm	0.01 mm	0 mm to 0.0025 mm	-0.0025 mm to 0 mm	5 15/32"	8	Rockwell C60	Tool Steel	ASME B89.1.5	000000000	00000
4.5800 mm to 7.1400 mm	0.01 mm	0 mm to 0.0025 mm	-0.0025 mm to 0 mm	6 1/8"	8	Rockwell C60	Tool Steel	ASME B89.1.5	00000000	00000
7.1500 mm to 10.3100 mm	0.01 mm	0 mm to 0.0025 mm	-0.0025 mm to 0 mm	6 19/32"	8	Rockwell C60	Tool Steel	ASME B89.1.5	00000000	00000
10.3200 mm to 12.9500 mm	0.01 mm	0 mm to 0.0025 mm	-0.0025 mm to 0 mm	7 3/16"	8	Rockwell C60	Tool Steel	ASME B89.1.5	00000000	00000
12.9600 mm to 16.1300 mm	0.01 mm	0 mm to 0.0025 mm	-0.0025 mm to 0 mm	7 17/32"	8	Rockwell C60	Tool Steel	ASME B89.1.5	00000000	00000
16.1400 mm to 19.3000 mm	0.01 mm	0 mm to 0.0025 mm	-0.0025 mm to 0 mm	7 17/32"	8	Rockwell C60	Tool Steel	ASME B89.1.5	00000000	00000
19.3100 mm to 25.6500 mm	0.01 mm	0 mm to 0.0025 mm	-0.0025 mm to 0 mm	7 21/32"	8	Rockwell C60	Tool Steel	ASME B89.1.5	00000000	00000

Metric—Class X

Choose a Plug Gauge Size	Increment	Go Plug Gauge Tolerance	No-Go Plug Gauge Size Tolerance	Lg.	Surface Smoothness (RMS), microinch	Hardness	Material	Specifications Met		Each
0.1010 mm to 0.3810 mm	0.001 mm	0 mm to 0.001 mm	-0.001 mm to 0 mm	5 1/4"	4	Rockwell C60	Tool Steel	ASME B89.1.5	0000000	0000000
0.3820 mm to 0.7620 mm	0.001 mm	0 mm to 0.001 mm	-0.001 mm to 0 mm	5 1/4"	4	Rockwell C60	Tool Steel	ASME B89.1.5	0000000	00000
0.7630 mm to 1.9050 mm	0.001 mm	0 mm to 0.001 mm	-0.001 mm to 0 mm	5 1/4"	4	Rockwell C60	Tool Steel	ASME B89.1.5	0000000	00000
1.9060 mm to 4.5720 mm	0.001 mm	0 mm to 0.001 mm	-0.001 mm to 0 mm	5 1/2"	4	Rockwell C60	Tool Steel	ASME B89.1.5	0000000	00000
4.5730 mm to 7.1370 mm	0.001 mm	0 mm to 0.001 mm	-0.001 mm to 0 mm	6 1/8"	4	Rockwell C60	Tool Steel	ASME B89.1.5	0000000	00000
7.1380 mm to 10.3120 mm	0.001 mm	0 mm to 0.001 mm	-0.001 mm to 0 mm	6 3/4"	4	Rockwell C60	Tool Steel	ASME B89.1.5	0000000	00000
10.3130 mm to 12.9540 mm	0.001 mm	0 mm to 0.001 mm	-0.001 mm to 0 mm	7 1/4"	4	Rockwell C60	Tool Steel	ASME B89.1.5	0000000	00000
12.9550 mm to 16.1290 mm	0.001 mm	0 mm to 0.001 mm	-0.001 mm to 0 mm	7 1/2"	4	Rockwell C60	Tool Steel	ASME B89.1.5	0000000	00000
16.1300 mm to 19.3040 mm	0.001 mm	0 mm to 0.001 mm	-0.001 mm to 0 mm	7 3/4"	4	Rockwell C60	Tool Steel	ASME B89.1.5	0000000	00000
19.3050 mm to 25.6540 mm	0.001 mm	0 mm to 0.001 mm	-0.001 mm to 0 mm	8 1/4"	4	Rockwell C60	Tool Steel	ASME B89.1.5	0000000	000000

Plug Gauge Sets

With Case

With Cabinet

Keep dozens of plug gauges on hand to check a range of hole sizes. You’ll often hear them called pin gauges. Use them to measure hole size and depth with precise go/no-go tests, check hole location and distance, and set micrometers. Sets include a manufacturer's certificate of accuracy to certify diameters are within tolerance. Gauges are tool steel, so they’re strong, hard, and resist wear.

If a go gauge can enter the hole and a no-go gauge is unable to enter, the hole is within tolerance. Go gauges check the minimum hole diameter. No-go gauges check the maximum hole diameter.

Choose a class based on the level of precision you need—the smaller the tolerance, the greater the accuracy. Classes are based on ASME standard B89.1.5, which states diameter won’t vary more than the listed plug gauge tolerance. Class Z gauges are the most common. You'll often find them used on shop floors. Class ZZ gauges are ideal for quick checks that don't require extreme precision.

Black-oxide tool steel gauges show wear patterns, so you know when to calibrate or replace them.

Go Gauges
Plug Gauge Size	Increment	No. of Pieces	Lg.	Surface Smoothness (RMS), microinch	Material	Plug Gauge Tolerance	Specifications Met		Each
With Case
Class Z
0.2200mm to 1.5000mm	0.02mm	65	2"	8	Tool Steel	0mm to 0.0025mm	ASME B89.1.5	0000000	0000000
0.2300mm to 1.5100mm	0.02mm	65	2"	8	Tool Steel	0mm to 0.0025mm	ASME B89.1.5	00000000	000000
1.5200mm to 7.7000mm	0.02mm	310	2"	8	Tool Steel	0mm to 0.0025mm	ASME B89.1.5	00000000	000000
1.5300mm to 7.7100mm	0.02mm	310	2"	8	Tool Steel	0mm to 0.0025mm	ASME B89.1.5	00000000	000000
7.7200mm to 12.7000mm	0.02mm	250	2"	8	Tool Steel	0mm to 0.0025mm	ASME B89.1.5	00000000	000000
7.7300mm to 12.7100mm	0.02mm	250	2"	8	Tool Steel	0mm to 0.0025mm	ASME B89.1.5	00000000	000000
12.7200mm to 15.3000mm	0.02mm	130	2"	8	Tool Steel	0mm to 0.0025mm	ASME B89.1.5	00000000	000000
12.7300mm to 15.3100mm	0.02mm	130	2"	8	Tool Steel	0mm to 0.0025mm	ASME B89.1.5	00000000	000000
15.3200mm to 17.8000mm	0.02mm	125	2"	8	Tool Steel	0mm to 0.0025mm	ASME B89.1.5	00000000	000000
15.3300mm to 17.8100mm	0.02mm	125	2"	8	Tool Steel	0mm to 0.0025mm	ASME B89.1.5	00000000	000000
17.8200mm to 20.3600mm	0.02mm	128	2"	8	Tool Steel	0mm to 0.0025mm	ASME B89.1.5	00000000	000000
17.8300mm to 20.3700mm	0.02mm	128	2"	8	Tool Steel	0mm to 0.0025mm	ASME B89.1.5	00000000	000000
Class ZZ
0.2000mm to 1.2800mm	0.02mm	55	2"	10	Black-Oxide Tool Steel	0mm to 0.005mm	ASME B89.1.5	00000000	000000
0.2100mm to 1.2900mm	0.02mm	55	2"	10	Black-Oxide Tool Steel	0mm to 0.005mm	ASME B89.1.5	00000000	000000
1.3000mm to 4.9800mm	0.02mm	185	2"	10	Tool Steel	0mm to 0.005mm	ASME B89.1.5	0000000	000000
1.3000mm to 4.9800mm	0.02mm	185	2"	10	Black-Oxide Tool Steel	0mm to 0.005mm	ASME B89.1.5	00000000	000000
1.3100mm to 4.9900mm	0.02mm	185	2"	10	Black-Oxide Tool Steel	0mm to 0.005mm	ASME B89.1.5	00000000	000000
5.0000mm to 9.9800mm	0.02mm	250	2"	10	Tool Steel	0mm to 0.005mm	ASME B89.1.5	0000000	000000
5.0000mm to 9.9800mm	0.02mm	250	2"	10	Black-Oxide Tool Steel	0mm to 0.005mm	ASME B89.1.5	00000000	000000
5.0100mm to 9.9900mm	0.02mm	250	2"	10	Black-Oxide Tool Steel	0mm to 0.005mm	ASME B89.1.5	00000000	000000
10.0000mm to 13.9800mm	0.02mm	200	2"	10	Tool Steel	0mm to 0.005mm	ASME B89.1.5	0000000	000000
10.0000mm to 13.9800mm	0.02mm	200	2"	10	Black-Oxide Tool Steel	0mm to 0.005mm	ASME B89.1.5	00000000	000000
10.0100mm to 13.9900mm	0.02mm	200	2"	10	Black-Oxide Tool Steel	0mm to 0.005mm	ASME B89.1.5	00000000	000000
14.0000mm to 16.4800mm	0.02mm	125	2"	10	Black-Oxide Tool Steel	0mm to 0.005mm	ASME B89.1.5	00000000	000000
14.0100mm to 16.4900mm	0.02mm	125	2"	10	Black-Oxide Tool Steel	0mm to 0.005mm	ASME B89.1.5	00000000	000000
16.5000mm to 18.9800mm	0.02mm	125	2"	10	Black-Oxide Tool Steel	0mm to 0.005mm	ASME B89.1.5	00000000	000000
16.5100mm to 18.9900mm	0.02mm	125	2"	10	Black-Oxide Tool Steel	0mm to 0.005mm	ASME B89.1.5	00000000	000000
19.0000mm to 20.9800mm	0.02mm	100	2"	10	Black-Oxide Tool Steel	0mm to 0.0061mm	ASME B89.1.5	00000000	000000
19.0100mm to 20.9900mm	0.02mm	100	2"	10	Black-Oxide Tool Steel	0mm to 0.0061mm	ASME B89.1.5	00000000	000000
With Cabinet
Class Z
1.5200mm to 17.8000mm	0.02mm	815	2"	8	Tool Steel	0mm to 0.0025mm	ASME B89.1.5	00000000	00000000
1.5300mm to 17.8100mm	0.02mm	815	2"	8	Tool Steel	0mm to 0.0025mm	ASME B89.1.5	00000000	00000000
No-Go Gauges
With Case
Class Z
0.2200mm to 1.5000mm	0.02mm	65	2"	8	Tool Steel	-0.0025mm to 0mm	ASME B89.1.5	0000000	000000
0.2300mm to 1.5100mm	0.02mm	65	2"	8	Tool Steel	-0.0025mm to 0mm	ASME B89.1.5	00000000	000000
1.5200mm to 7.7000mm	0.02mm	310	2"	8	Tool Steel	-0.0025mm to 0mm	ASME B89.1.5	00000000	000000
1.5300mm to 7.7100mm	0.02mm	310	2"	8	Tool Steel	-0.0025mm to 0mm	ASME B89.1.5	00000000	000000
7.7200mm to 12.7000mm	0.02mm	250	2"	8	Tool Steel	-0.0025mm to 0mm	ASME B89.1.5	00000000	000000
7.7300mm to 12.7100mm	0.02mm	250	2"	8	Tool Steel	-0.0025mm to 0mm	ASME B89.1.5	00000000	000000
12.7200mm to 15.3000mm	0.02mm	130	2"	8	Tool Steel	-0.0025mm to 0mm	ASME B89.1.5	00000000	000000
12.7300mm to 15.3100mm	0.02mm	130	2"	8	Tool Steel	-0.0025mm to 0mm	ASME B89.1.5	00000000	000000
15.3200mm to 17.8000mm	0.02mm	125	2"	8	Tool Steel	-0.0025mm to 0mm	ASME B89.1.5	00000000	000000
15.3300mm to 17.8100mm	0.02mm	125	2"	8	Tool Steel	-0.0025mm to 0mm	ASME B89.1.5	00000000	000000
17.8200mm to 20.3600mm	0.02mm	128	2"	8	Tool Steel	-0.0025mm to 0mm	ASME B89.1.5	00000000	000000
17.8300mm to 20.3700mm	0.02mm	128	2"	8	Tool Steel	-0.0025mm to 0mm	ASME B89.1.5	00000000	000000
Class ZZ
0.2000mm to 1.2800mm	0.02mm	55	2"	10	Black-Oxide Tool Steel	-0.005mm to 0mm	ASME B89.1.5	00000000	000000
0.2100mm to 1.2900mm	0.02mm	55	2"	10	Black-Oxide Tool Steel	-0.005mm to 0mm	ASME B89.1.5	00000000	000000
1.3000mm to 4.9800mm	0.02mm	185	2"	10	Tool Steel	-0.005mm to 0mm	ASME B89.1.5	0000000	000000
1.3000mm to 4.9800mm	0.02mm	185	2"	10	Black-Oxide Tool Steel	-0.005mm to 0mm	ASME B89.1.5	00000000	000000
1.3100mm to 4.9900mm	0.02mm	185	2"	10	Black-Oxide Tool Steel	-0.005mm to 0mm	ASME B89.1.5	00000000	000000
5.0000mm to 9.9800mm	0.02mm	250	2"	10	Tool Steel	-0.005mm to 0mm	ASME B89.1.5	0000000	000000
5.0000mm to 9.9800mm	0.02mm	250	2"	10	Black-Oxide Tool Steel	-0.005mm to 0mm	ASME B89.1.5	00000000	000000
5.0100mm to 9.9900mm	0.02mm	250	2"	10	Black-Oxide Tool Steel	-0.005mm to 0mm	ASME B89.1.5	00000000	000000
10.0000mm to 13.9800mm	0.02mm	200	2"	10	Tool Steel	-0.005mm to 0mm	ASME B89.1.5	0000000	000000
10.0000mm to 13.9800mm	0.02mm	200	2"	10	Black-Oxide Tool Steel	-0.005mm to 0mm	ASME B89.1.5	00000000	000000
10.0100mm to 13.9900mm	0.02mm	200	2"	10	Black-Oxide Tool Steel	-0.005mm to 0mm	ASME B89.1.5	00000000	000000
14.0000mm to 16.4800mm	0.02mm	125	2"	10	Black-Oxide Tool Steel	-0.005mm to 0mm	ASME B89.1.5	00000000	000000
14.0100mm to 16.4900mm	0.02mm	125	2"	10	Black-Oxide Tool Steel	-0.005mm to 0mm	ASME B89.1.5	00000000	000000
16.5000mm to 18.9800mm	0.02mm	125	2"	10	Black-Oxide Tool Steel	-0.005mm to 0mm	ASME B89.1.5	00000000	000000
16.5100mm to 18.9900mm	0.02mm	125	2"	10	Black-Oxide Tool Steel	-0.005mm to 0mm	ASME B89.1.5	00000000	000000
19.0000mm to 20.9800mm	0.02mm	100	2"	10	Black-Oxide Tool Steel	-0.0061mm to 0mm	ASME B89.1.5	00000000	000000
19.0100mm to 20.9900mm	0.02mm	100	2"	10	Black-Oxide Tool Steel	-0.0061mm to 0mm	ASME B89.1.5	00000000	000000
With Cabinet
Class Z
1.5200mm to 17.8000mm	0.02mm	815	2"	8	Tool Steel	-0.00254mm to 0mm	ASME B89.1.5	00000000	00000000
1.5300mm to 17.8100mm	0.02mm	815	2"	8	Tool Steel	-0.00254mm to 0mm	ASME B89.1.5	00000000	00000000

Threaded Plug Gauges with Calibration Certificate

These gauges come with a certificate of calibration traceable to NIST that states they’ve passed a test for accuracy. They allow you to inspect internal threads on parts. All have a go gauge on one end and a no-go gauge on the other end. A taperlock handle lets you quickly replace worn gauges.

Check the minimum internal thread size with the go gauge end, and check the maximum internal thread size with the no-go gauge end. A part is within tolerance if it’s easy to thread the go gauge into the part but difficult to thread the no-go gauge more than two turns.

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

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

Metric

					Class 6H
Thread Size	Pitch	Pitch Dia. Tolerance	Hardness	Material		Each
Class X
M1.6	0.35mm	-0.005" to 0.005"	Rockwell C70	Chrome-Plated Tool Steel	00000000	0000000
M2	0.4mm	-0.005" to 0.005"	Rockwell C70	Chrome-Plated Tool Steel	00000000	000000
M2.5	0.45mm	-0.005" to 0.005"	Rockwell C70	Chrome-Plated Tool Steel	00000000	000000
M3	0.5mm	-0.005" to 0.005"	Rockwell C70	Chrome-Plated Tool Steel	00000000	000000
M3.5	0.6mm	-0.005" to 0.005"	Rockwell C70	Chrome-Plated Tool Steel	00000000	000000
M4	0.7mm	-0.005" to 0.005"	Rockwell C70	Chrome-Plated Tool Steel	00000000	000000
M5	0.8mm	-0.008" to 0.008"	Rockwell C70	Chrome-Plated Tool Steel	00000000	000000
M6	1mm	-0.008" to 0.008"	Rockwell C70	Chrome-Plated Tool Steel	00000000	000000
M7	1mm	-0.008" to 0.008"	Rockwell C70	Chrome-Plated Tool Steel	00000000	000000
M8	1mm	-0.008" to 0.008"	Rockwell C70	Chrome-Plated Tool Steel	00000000	000000
M8	1.25mm	-0.008" to 0.008"	Rockwell C70	Chrome-Plated Tool Steel	00000000	000000
M10	1.25mm	-0.008" to 0.008"	Rockwell C70	Chrome-Plated Tool Steel	00000000	000000
M10	1.5mm	-0.008" to 0.008"	Rockwell C70	Chrome-Plated Tool Steel	00000000	000000
M12	1mm	-0.008" to 0.008"	Rockwell C70	Chrome-Plated Tool Steel	00000000	000000
M12	1.25mm	-0.008" to 0.008"	Rockwell C70	Chrome-Plated Tool Steel	00000000	000000
M12	1.5mm	-0.008" to 0.008"	Rockwell C70	Chrome-Plated Tool Steel	00000000	000000
M12	1.75mm	-0.008" to 0.008"	Rockwell C70	Chrome-Plated Tool Steel	00000000	000000
M14	1.5mm	-0.008" to 0.008"	Rockwell C70	Chrome-Plated Tool Steel	00000000	000000
M16	1.5mm	-0.008" to 0.008"	Rockwell C70	Chrome-Plated Tool Steel	00000000	000000
M16	2mm	-0.008" to 0.008"	Rockwell C70	Chrome-Plated Tool Steel	00000000	000000
M18	1.5mm	-0.008" to 0.008"	Rockwell C70	Chrome-Plated Tool Steel	00000000	000000

Threaded Plug Gauges

These have a go gauge on one end and a no-go gauge on the other end. They allow you to inspect internal threads on parts. A taperlock handle lets you quickly replace worn gauges.

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

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

Metric

Class X
Thread Size	Pitch	Pitch Dia. Tolerance	Hardness	Material	For Thread Fit		Each
M1.6	0.35mm	-0.005" to 0.005"	Rockwell C70	Chrome-Plated Tool Steel	Class 6H	000000000	0000000
M2	0.4mm	-0.005" to 0.005"	Rockwell C70	Chrome-Plated Tool Steel	Class 6H	000000000	000000
M2.5	0.45mm	-0.005" to 0.005"	Rockwell C70	Chrome-Plated Tool Steel	Class 6H	000000000	000000
M3	0.5mm	-0.005" to 0.005"	Rockwell C70	Chrome-Plated Tool Steel	Class 6H	000000000	000000
M3.5	0.6mm	-0.005" to 0.005"	Rockwell C70	Chrome-Plated Tool Steel	Class 6H	000000000	000000
M4	0.7mm	-0.005" to 0.005"	Rockwell C70	Chrome-Plated Tool Steel	Class 6H	000000000	000000
M5	0.8mm	-0.008" to 0.008"	Rockwell C70	Chrome-Plated Tool Steel	Class 6H	000000000	000000
M6	1mm	-0.008" to 0.008"	Rockwell C70	Chrome-Plated Tool Steel	Class 6H	000000000	000000
M8	1mm	-0.008" to 0.008"	Rockwell C70	Chrome-Plated Tool Steel	Class 6H	000000000	000000
M8	1.25mm	-0.008" to 0.008"	Rockwell C70	Chrome-Plated Tool Steel	Class 6H	000000000	000000
M10	1.25mm	-0.008" to 0.008"	Rockwell C70	Chrome-Plated Tool Steel	Class 6H	000000000	000000
M10	1.5mm	-0.008" to 0.008"	Rockwell C70	Chrome-Plated Tool Steel	Class 6H	000000000	000000
M12	1mm	-0.008" to 0.008"	Rockwell C70	Chrome-Plated Tool Steel	Class 6H	000000000	000000
M12	1.25mm	-0.008" to 0.008"	Rockwell C70	Chrome-Plated Tool Steel	Class 6H	000000000	000000
M12	1.5mm	-0.008" to 0.008"	Rockwell C70	Chrome-Plated Tool Steel	Class 6H	000000000	000000
M12	1.75mm	-0.008" to 0.008"	Rockwell C70	Chrome-Plated Tool Steel	Class 6H	000000000	000000
M14	1.5mm	-0.008" to 0.008"	Rockwell C70	Chrome-Plated Tool Steel	Class 6H	000000000	000000
M16	1.5mm	-0.008" to 0.008"	Rockwell C70	Chrome-Plated Tool Steel	Class 6H	000000000	000000
M16	2mm	-0.008" to 0.008"	Rockwell C70	Chrome-Plated Tool Steel	Class 6H	000000000	000000
M18	1.5mm	-0.008" to 0.008"	Rockwell C70	Chrome-Plated Tool Steel	Class 6H	000000000	000000

Threaded Plug Gauge Handles

Speed up checking thread tolerances by threading a go gauge on one end of these handles and a no-go gauge on the other. These handles give you a good grip to thread and unthread the gauges into the hole you’re measuring. Use them with taperlock threaded plug gauges.

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

Metric

Shown with Plug Gauges (Not Included)

For Plug Gauge Thread Dia.	O'all Lg.	Material	Color		Each
M1.6, M1.8, M2, M2.2, M2.5	1 1/2"	Aluminum	Yellow	0000000	000000
M3, M3.5	1 3/4"	Aluminum	Yellow	0000000	00000
M4, M4.5, M5, M5.5	2"	Aluminum	Yellow	0000000	00000
M6, M7, M8, M9	2 3/4"	Aluminum	Yellow	0000000	00000
M10, M11, M12	3"	Aluminum	Yellow	0000000	00000
M14, M15, M16, M17, M18, M20	3 1/4"	Aluminum	Yellow	0000000	00000
M22, M24, M25, M26, M27, M28	3 5/8"	Aluminum	Yellow	0000000	00000

Go/No-Go Hex Plug Gauges with Handle

Confirm hex drives on socket head screws are within tolerance. A go and no-go gauge in one, these gauges are handy for testing hole size and depth in machining and manufacturing. Their handle gives you a good grip to insert each end into the hole you’re measuring. If the go gauge enters the hole and the no-go gauge is unable to enter, the hole is within tolerance. Gauges are made of tool steel, the most common material for plug gauges, because it’s strong, hard, and resistant to wear.

All come with a certificate of compliance traceable to NIST to certify their sizes are within tolerance. They also meet ASME B18.3, the same dimensional standards for hex drive fasteners.

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

	Plug Gauge Size Tolerance
Plug Gauge Size	Go	No-Go	Hardness	Material	End Color	Specifications Met		Each
1.5mm	0mm to 0.003mm	-0.003mm to 0mm	Rockwell C60	Tool Steel	Green, Red	ASME B18.3	0000000	0000000
2mm	0mm to 0.003mm	-0.003mm to 0mm	Rockwell C60	Tool Steel	Green, Red	ASME B18.3	0000000	000000
2.5mm	0mm to 0.003mm	-0.003mm to 0mm	Rockwell C60	Tool Steel	Green, Red	ASME B18.3	0000000	000000
3mm	0mm to 0.003mm	-0.003mm to 0mm	Rockwell C60	Tool Steel	Green, Red	ASME B18.3	0000000	000000
4mm	0mm to 0.003mm	-0.003mm to 0mm	Rockwell C60	Tool Steel	Green, Red	ASME B18.3	0000000	000000
5mm	0mm to 0.003mm	-0.003mm to 0mm	Rockwell C60	Tool Steel	Green, Red	ASME B18.3	0000000	000000
6mm	0mm to 0.003mm	-0.003mm to 0mm	Rockwell C60	Tool Steel	Green, Red	ASME B18.3	0000000	000000
8mm	0mm to 0.003mm	-0.003mm to 0mm	Rockwell C60	Tool Steel	Green, Red	ASME B18.3	0000000	000000
10mm	0mm to 0.003mm	-0.003mm to 0mm	Rockwell C60	Tool Steel	Green, Red	ASME B18.3	0000000	000000
12mm	0mm to 0.003mm	-0.003mm to 0mm	Rockwell C60	Tool Steel	Green, Red	ASME B18.3	0000000	000000
14mm	0mm to 0.003mm	-0.003mm to 0mm	Rockwell C60	Tool Steel	Green, Red	ASME B18.3	0000000	000000
17mm	0mm to 0.003mm	-0.003mm to 0mm	Rockwell C60	Tool Steel	Green, Red	ASME B18.3	0000000	000000
19mm	0mm to 0.003mm	-0.003mm to 0mm	Rockwell C60	Tool Steel	Green, Red	ASME B18.3	0000000	000000
22mm	0mm to 0.003mm	-0.003mm to 0mm	Rockwell C60	Tool Steel	Green, Red	ASME B18.3	0000000	000000
24mm	0mm to 0.003mm	-0.003mm to 0mm	Rockwell C60	Tool Steel	Green, Red	ASME B18.3	0000000	000000