Class Z Gauge Pins | McMaster-Carr

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138 Products

Class Z Plug Gauges

Also known as pin gauges, these Class Z plug gauges help you measure hole size and depth, check hole location and distance, and set micrometers. 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—Go gauges check the minimum hole diameter.

No-Go Gauges—No-go gauges check the maximum hole diameter.

							Go Gauges			No-Go Gauges
	Choose a Plug Gauge Size	Lg.	Surface Smoothness, RMS, μin	Hardness	Material	Specs. Met	Plug Gauge Size Tolerance		Each	Plug Gauge Size Tolerance		Each
Class Z Gauge



		0.0110" to 0.0605"	2"	8	Rockwell C60	Tool Steel	ASME B89.1.5	0" to 0.0001"	23055A001	00000	-0.0001" to 0"	23065A503	00000


		0.0610" to 0.2405"	2"	8	Rockwell C60	Tool Steel	ASME B89.1.5	0" to 0.0001"	23055A97	0000	—	———	0
		0.0610" to 0.2500"	2"	8	Rockwell C60	Tool Steel	ASME B89.1.5	—	———	0	-0.0001" to 0"	23065A674	0000
		0.2410" to 0.5005"	2"	8	Rockwell C60	Tool Steel	ASME B89.1.5	0" to 0.0001"	23055A99	0000	—	———	0
		0.2505" to 0.5005"	2"	8	Rockwell C60	Tool Steel	ASME B89.1.5	—	———	0	-0.0001" to 0"	23065A855	0000
		0.5010" to 0.6255"	2"	8	Rockwell C60	Tool Steel	ASME B89.1.5	0" to 0.0001"	23055A004	0000	-0.0001" to 0"	23065A506	0000
		0.6260" to 0.7505"	2"	8	Rockwell C60	Tool Steel	ASME B89.1.5	0" to 0.0001"	23055A005	00000	-0.0001" to 0"	23065A507	00000
		0.7510" to 0.8325"	2"	8	Rockwell C60	Tool Steel	ASME B89.1.5	0" to 0.0001"	23055A006	00000	-0.0001" to 0"	23065A508	00000
		0.8330" to 0.9165"	2"	8	Rockwell C60	Tool Steel	ASME B89.1.5	0" to 0.0001"	23055A007	00000	-0.0001" to 0"	23065A509	00000
		0.9170" to 1.0005"	2"	8	Rockwell C60	Tool Steel	ASME B89.1.5	0" to 0.0001"	23055A008	00000	-0.0001" to 0"	23065A511	00000
		0.2200 mm to 1.5100 mm	2"	8	Rockwell C60	Tool Steel	ASME B89.1.5	0 mm to 0.0025 mm	2281A1	0000	-0.0025 mm to 0 mm	2281A9	00000


		1.5200 mm to 12.7100 mm	2"	8	Rockwell C60	Tool Steel	ASME B89.1.5	0 mm to 0.0025 mm	2281A2	0000	-0.0025 mm to 0 mm	2281A11	0000
		12.7200 mm to 15.3100 mm	2"	8	Rockwell C60	Tool Steel	ASME B89.1.5	0 mm to 0.0025 mm	2281A3	0000	-0.0025 mm to 0 mm	2281A12	0000
		15.3200 mm to 17.8100 mm	2"	8	Rockwell C60	Tool Steel	ASME B89.1.5	0 mm to 0.0025 mm	2281A4	00000	-0.0025 mm to 0 mm	2281A13	00000
		17.8200 mm to 20.3700 mm	2"	8	Rockwell C60	Tool Steel	ASME B89.1.5	0 mm to 0.0025 mm	2281A5	00000	-0.0025 mm to 0 mm	2281A14	00000
		20.3800 mm to 22.0500 mm	2"	8	Rockwell C60	Tool Steel	ASME B89.1.5	0 mm to 0.0025 mm	2281A6	00000	-0.0025 mm to 0 mm	2281A15	00000
		22.0600 mm to 23.7300 mm	2"	8	Rockwell C60	Tool Steel	ASME B89.1.5	0 mm to 0.0025 mm	2281A7	00000	-0.0025 mm to 0 mm	2281A16	00000
		23.7400 mm to 25.4100 mm	2"	8	Rockwell C60	Tool Steel	ASME B89.1.5	0 mm to 0.0025 mm	2281A8	00000	-0.0025 mm to 0 mm	2281A17	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 an accuracy certificate 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.

	Plug Gauge Size		Plug Gauge Size Tolerance
	Go	No-Go	Go	No-Go	Lg.	Surface Smoothness, RMS, μin	Hardness	Material	Specs. Met	Features		Each
Class Z Gauge



		0.0050" to 0.0755"	0.0050" to 0.0755"	0" to 0.0001"	-0.0001" to 0"	5 1/4"	8	Rockwell C60	Tool Steel	ASME B89.1.5	Handle	21205A211	000000


		0.0760" to 0.1805"	0.0760" to 0.1805"	0" to 0.0001"	-0.0001" to 0"	5 15/32"	8	Rockwell C60	Tool Steel	ASME B89.1.5	Handle	21205A221	00000
		0.1810" to 0.2815"	0.1810" to 0.2815"	0" to 0.0001"	-0.0001" to 0"	6 1/8"	8	Rockwell C60	Tool Steel	ASME B89.1.5	Handle	21205A231	00000
		0.2820" to 0.4065"	0.2820" to 0.4065"	0" to 0.0001"	-0.0001" to 0"	6 19/32"	8	Rockwell C60	Tool Steel	ASME B89.1.5	Handle	21205A241	00000
		0.4070" to 0.5105"	0.4070" to 0.5105"	0" to 0.0001"	-0.0001" to 0"	7 3/16"	8	Rockwell C60	Tool Steel	ASME B89.1.5	Handle	21205A251	00000
		0.5110" to 0.6355"	0.5110" to 0.6355"	0" to 0.0001"	-0.0001" to 0"	7 3/16"	8	Rockwell C60	Tool Steel	ASME B89.1.5	Handle	21205A26	00000
		0.6360" to 0.7605"	0.6360" to 0.7605"	0" to 0.0001"	-0.0001" to 0"	7 17/32"	8	Rockwell C60	Tool Steel	ASME B89.1.5	Handle	21205A27	00000
		0.7610" to 1.0150"	0.7610" to 1.0150"	0" to 0.0001"	-0.0001" to 0"	7 17/32"	8	Rockwell C60	Tool Steel	ASME B89.1.5	Handle	21205A28	00000
		0.2200 mm to 1.9100 mm	0.2200 mm to 1.9100 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	Handle	21205A71	00000
		1.9200 mm to 4.5700 mm	1.9200 mm to 4.5700 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	Handle	21205A721	00000
		4.5800 mm to 7.1400 mm	4.5800 mm to 7.1400 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	Handle	21205A73	00000


		7.1500 mm to 10.3100 mm	7.1500 mm to 10.3100 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	Handle	21205A74	00000
		10.3200 mm to 12.9500 mm	10.3200 mm to 12.9500 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	Handle	21205A75	00000
		12.9600 mm to 16.1300 mm	12.9600 mm to 16.1300 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	Handle	21205A77	00000
		16.1400 mm to 19.3000 mm	16.1400 mm to 19.3000 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	Handle	21205A78	00000
		19.3100 mm to 25.6500 mm	19.3100 mm to 25.6500 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	Handle	21205A79	000000

Plug Gauge Sets

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.

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.

Case

Go Gauges—Go gauges check the minimum hole diameter.

No-Go Gauges—No-go gauges check the maximum hole diameter.

Class Z Gauge—Class Z gauges are the most common. You'll often find them used on shop floors.

	Plug Gauge Size	Increment	No. of Pieces	Lg.	Surface Smoothness, RMS, μin	Material	Plug Gauge Size Tolerance	Specs. Met		Each
Go Gauges







				Class Z Gauge

				0.0110" to 0.0600"	0.001"	50	2"	8	Tool Steel	0" to 0.0001"	ASME B89.1.5	2326A11	0000000


				0.0110" to 0.2500"	0.001"	240	2"	8	Tool Steel	0" to 0.0001"	ASME B89.1.5	2326A19	000000
				0.0115" to 0.0605"	0.001"	50	2"	8	Tool Steel	0" to 0.0001"	ASME B89.1.5	2326A21	000000
				0.0115" to 0.2505"	0.001"	240	2"	8	Tool Steel	0" to 0.0001"	ASME B89.1.5	2326A29	000000
				0.0610" to 0.2500"	0.001"	190	2"	8	Tool Steel	0" to 0.0001"	ASME B89.1.5	2326A12	000000
				0.0615" to 0.2505"	0.001"	190	2"	8	Tool Steel	0" to 0.0001"	ASME B89.1.5	2326A22	000000
				0.2510" to 0.5000"	0.001"	250	2"	8	Tool Steel	0" to 0.0001"	ASME B89.1.5	2326A13	000000
				0.2515" to 0.5005"	0.001"	250	2"	8	Tool Steel	0" to 0.0001"	ASME B89.1.5	2326A23	000000
				0.5010" to 0.6250"	0.001"	125	2"	8	Tool Steel	0" to 0.0001"	ASME B89.1.5	2326A14	000000
				0.5015" to 0.6255"	0.001"	125	2"	8	Tool Steel	0" to 0.0001"	ASME B89.1.5	2326A44	000000
				0.6260" to 0.7500"	0.001"	125	2"	8	Tool Steel	0" to 0.0001"	ASME B89.1.5	2326A15	000000


				0.6265" to 0.7505"	0.001"	125	2"	8	Tool Steel	0" to 0.0001"	ASME B89.1.5	2326A45	000000
				0.7510" to 0.8320"	0.001"	82	2"	8	Tool Steel	0" to 0.0001"	ASME B89.1.5	2326A16	000000
				0.7515" to 0.8325"	0.001"	82	2"	8	Tool Steel	0" to 0.0001"	ASME B89.1.5	2326A46	000000
				0.8330" to 0.9160"	0.001"	84	2"	8	Tool Steel	0" to 0.0001"	ASME B89.1.5	2326A51	00000000
				0.8335" to 0.9165"	0.001"	84	2"	8	Tool Steel	0" to 0.0001"	ASME B89.1.5	2326A47	00000000
				0.9170" to 1.0000"	0.001"	84	2"	8	Tool Steel	0" to 0.0001"	ASME B89.1.5	2326A52	00000000
				0.9175" to 1.0005"	0.001"	84	2"	8	Tool Steel	0" to 0.0001"	ASME B89.1.5	2326A48	00000000
				0.2200 mm to 1.5000 mm	0.02 mm	65	2"	8	Tool Steel	0 mm to 0.0025 mm	ASME B89.1.5	2326A61	000000
				0.2300 mm to 1.5100 mm	0.02 mm	65	2"	8	Tool Steel	0 mm to 0.0025 mm	ASME B89.1.5	2326A512	000000
				1.5200 mm to 7.7000 mm	0.02 mm	310	2"	8	Tool Steel	0 mm to 0.0025 mm	ASME B89.1.5	2326A514	000000


				1.5300 mm to 7.7100 mm	0.02 mm	310	2"	8	Tool Steel	0 mm to 0.0025 mm	ASME B89.1.5	2326A516	000000
				7.7200 mm to 12.7000 mm	0.02 mm	250	2"	8	Tool Steel	0 mm to 0.0025 mm	ASME B89.1.5	2326A518	000000
				7.7300 mm to 12.7100 mm	0.02 mm	250	2"	8	Tool Steel	0 mm to 0.0025 mm	ASME B89.1.5	2326A521	000000
				12.7200 mm to 15.3000 mm	0.02 mm	130	2"	8	Tool Steel	0 mm to 0.0025 mm	ASME B89.1.5	2326A523	000000
				12.7300 mm to 15.3100 mm	0.02 mm	130	2"	8	Tool Steel	0 mm to 0.0025 mm	ASME B89.1.5	2326A525	000000
				15.3200 mm to 17.8000 mm	0.02 mm	125	2"	8	Tool Steel	0 mm to 0.0025 mm	ASME B89.1.5	2326A527	000000
				15.3300 mm to 17.8100 mm	0.02 mm	125	2"	8	Tool Steel	0 mm to 0.0025 mm	ASME B89.1.5	2326A529	000000
				17.8200 mm to 20.3600 mm	0.02 mm	128	2"	8	Tool Steel	0 mm to 0.0025 mm	ASME B89.1.5	2326A532	000000
				17.8300 mm to 20.3700 mm	0.02 mm	128	2"	8	Tool Steel	0 mm to 0.0025 mm	ASME B89.1.5	2326A534	000000


				No-Go Gauges







								Class Z Gauge

								0.0110" to 0.0600"	0.001"	50	2"	8	Tool Steel	-0.0001" to 0"	ASME B89.1.5	2326A31	000000


								0.0110" to 0.2500"	0.001"	240	2"	8	Tool Steel	-0.0001" to 0"	ASME B89.1.5	2326A39	000000
								0.0115" to 0.0605"	0.001"	50	2"	8	Tool Steel	-0.0001" to 0"	ASME B89.1.5	2326A41	000000
								0.0115" to 0.2505"	0.001"	240	2"	8	Tool Steel	-0.0001" to 0"	ASME B89.1.5	2326A49	000000
								0.0610" to 0.2500"	0.001"	190	2"	8	Tool Steel	-0.0001" to 0"	ASME B89.1.5	2326A32	000000
0.0615" to 0.2505"								0.001"	190	2"	8	Tool Steel	-0.0001" to 0"	ASME B89.1.5	2326A42	000000
0.2510" to 0.5000"	0.001"							250	2"	8	Tool Steel	-0.0001" to 0"	ASME B89.1.5	2326A33	000000
0.2515" to 0.5005"	0.001"							250	2"	8	Tool Steel	-0.0001" to 0"	ASME B89.1.5	2326A43	000000
0.5010" to 0.6250"	0.001"							125	2"	8	Tool Steel	-0.0001" to 0"	ASME B89.1.5	2326A34	000000
0.5015" to 0.6255"	0.001"							125	2"	8	Tool Steel	-0.0001" to 0"	ASME B89.1.5	2326A24	000000
0.6260" to 0.7500"	0.001"	125						2"	8	Tool Steel	-0.0001" to 0"	ASME B89.1.5	2326A35	000000


0.6265" to 0.7505"	0.001"	125	2"					8	Tool Steel	-0.0001" to 0"	ASME B89.1.5	2326A25	000000
0.7510" to 0.8320"	0.001"	82	2"					8	Tool Steel	-0.0001" to 0"	ASME B89.1.5	2326A36	000000
0.7515" to 0.8325"	0.001"	82	2"					8	Tool Steel	-0.0001" to 0"	ASME B89.1.5	2326A26	000000
0.8330" to 0.9160"	0.001"	84	2"					8	Tool Steel	-0.0001" to 0"	ASME B89.1.5	2326A37	00000000
0.8335" to 0.9165"	0.001"	84	2"					8	Tool Steel	-0.0001" to 0"	ASME B89.1.5	2326A27	00000000
0.9170" to 1.0000"	0.001"	84	2"					8	Tool Steel	-0.0001" to 0"	ASME B89.1.5	2326A38	00000000
0.9175" to 1.0005"	0.001"	84	2"					8	Tool Steel	-0.0001" to 0"	ASME B89.1.5	2326A28	00000000
0.2200 mm to 1.5000 mm	0.02 mm	65	2"					8	Tool Steel	-0.0025 mm to 0 mm	ASME B89.1.5	2326A65	000000
0.2300 mm to 1.5100 mm	0.02 mm	65	2"					8	Tool Steel	-0.0025 mm to 0 mm	ASME B89.1.5	2326A511	000000
1.5200 mm to 7.7000 mm	0.02 mm	310	2"					8	Tool Steel	-0.0025 mm to 0 mm	ASME B89.1.5	2326A513	000000


1.5300 mm to 7.7100 mm	0.02 mm	310	2"					8	Tool Steel	-0.0025 mm to 0 mm	ASME B89.1.5	2326A515	000000
7.7200 mm to 12.7000 mm	0.02 mm	250	2"					8	Tool Steel	-0.0025 mm to 0 mm	ASME B89.1.5	2326A517	000000
7.7300 mm to 12.7100 mm	0.02 mm	250	2"					8	Tool Steel	-0.0025 mm to 0 mm	ASME B89.1.5	2326A519	000000
12.7200 mm to 15.3000 mm	0.02 mm	130	2"					8	Tool Steel	-0.0025 mm to 0 mm	ASME B89.1.5	2326A522	000000
12.7300 mm to 15.3100 mm	0.02 mm	130	2"					8	Tool Steel	-0.0025 mm to 0 mm	ASME B89.1.5	2326A524	000000
15.3200 mm to 17.8000 mm	0.02 mm	125	2"					8	Tool Steel	-0.0025 mm to 0 mm	ASME B89.1.5	2326A526	000000
15.3300 mm to 17.8100 mm	0.02 mm	125	2"					8	Tool Steel	-0.0025 mm to 0 mm	ASME B89.1.5	2326A528	000000
17.8200 mm to 20.3600 mm	0.02 mm	128	2"					8	Tool Steel	-0.0025 mm to 0 mm	ASME B89.1.5	2326A531	000000
17.8300 mm to 20.3700 mm	0.02 mm	128	2"					8	Tool Steel	-0.0025 mm to 0 mm	ASME B89.1.5	2326A533	000000

Cabinet

Go Gauges—Go gauges check the minimum hole diameter.

No-Go Gauges—No-go gauges check the maximum hole diameter.

Class Z Gauge—Class Z gauges are the most common. You'll often find them used on shop floors.

	Lg.	Surface Smoothness, RMS, μin	Material	Plug Gauge Size Tolerance	Specs. Met		Each
Go Gauges







	Class Z Gauge

	0.0110" to 0.5005"	0.0005"	980	2"	8	Tool Steel	0" to 0.0001"	ASME B89.1.5	21015A1	000000000


	0.0110" to 0.6250"	0.001"	615	2"	8	Tool Steel	0" to 0.0001"	ASME B89.1.5	21015A11	00000000
	0.0110" to 0.7500"	0.001"	740	2"	8	Tool Steel	0" to 0.0001"	ASME B89.1.5	21015A13	00000000
	0.0110" to 1.0000"	0.001"	990	2"	8	Tool Steel	0" to 0.0001"	ASME B89.1.5	21015A14	00000000
	0.0115" to 0.7505"	0.001"	740	2"	8	Tool Steel	0" to 0.0001"	ASME B89.1.5	21015A15	00000000
	0.0115" to 1.0005"	0.001"	990	2"	8	Tool Steel	0" to 0.0001"	ASME B89.1.5	21015A16	00000000
	0.0610" to 0.5005"	0.0005"	880	2"	8	Tool Steel	0" to 0.0001"	ASME B89.1.5	21015A17	00000000
	0.0610" to 0.7500"	0.001"	690	2"	8	Tool Steel	0" to 0.0001"	ASME B89.1.5	21015A12	00000000
	0.0610" to 1.0000"	0.001"	940	2"	8	Tool Steel	0" to 0.0001"	ASME B89.1.5	21015A18	00000000
	0.0615" to 0.7505"	0.001"	690	2"	8	Tool Steel	0" to 0.0001"	ASME B89.1.5	21015A19	00000000
	0.0615" to 1.0005"	0.001"	940	2"	8	Tool Steel	0" to 0.0001"	ASME B89.1.5	21015A41	00000000


	0.7510" to 1.0000"	0.001"	250	2"	8	Tool Steel	0" to 0.0001"	ASME B89.1.5	21015A42	00000000
	0.7515" to 1.0005"	0.001"	250	2"	8	Tool Steel	0" to 0.0001"	ASME B89.1.5	21015A43	00000000
	1.5200 mm to 17.8000 mm	0.02 mm	815	2"	8	Tool Steel	0 mm to 0.0025 mm	ASME B89.1.5	21015A32	00000000
	1.5300 mm to 17.8100 mm	0.02 mm	815	2"	8	Tool Steel	0 mm to 0.0025 mm	ASME B89.1.5	21015A34	00000000


	No-Go Gauges







					Class Z Gauge

					0.0110" to 0.5005"	0.0005"	980	2"	8	Tool Steel	-0.0001" to 0"	ASME B89.1.5	21015A2	00000000


					0.0110" to 0.6250"	0.001"	615	2"	8	Tool Steel	-0.0001" to 0"	ASME B89.1.5	21015A21	00000000
					0.0110" to 0.7500"	0.001"	740	2"	8	Tool Steel	-0.0001" to 0"	ASME B89.1.5	21015A23	00000000
					0.0110" to 1.0000"	0.001"	990	2"	8	Tool Steel	-0.00012" to 0"	ASME B89.1.5	21015A24	00000000
					0.0115" to 0.7505"	0.001"	740	2"	8	Tool Steel	-0.0001" to 0"	ASME B89.1.5	21015A25	00000000
					0.0115" to 1.0005"	0.001"	990	2"	8	Tool Steel	-0.00012" to 0"	ASME B89.1.5	21015A26	00000000
					0.0610" to 0.5005"	0.0005"	880	2"	8	Tool Steel	-0.0001" to 0"	ASME B89.1.5	21015A27	00000000
					0.0610" to 0.7500"	0.001"	690	2"	8	Tool Steel	-0.0001" to 0"	ASME B89.1.5	21015A22	00000000
					0.0610" to 1.0000"	0.001"	940	2"	8	Tool Steel	-0.00012" to 0"	ASME B89.1.5	21015A28	00000000
					0.0615" to 0.7505"	0.001"	690	2"	8	Tool Steel	-0.0001" to 0"	ASME B89.1.5	21015A29	00000000
					0.0615" to 1.0005"	0.001"	940	2"	8	Tool Steel	-0.00012" to 0"	ASME B89.1.5	21015A51	00000000


					0.7510" to 1.0000"	0.001"	250	2"	8	Tool Steel	-0.00012" to 0"	ASME B89.1.5	21015A52	00000000
					0.7515" to 1.0005"	0.001"	250	2"	8	Tool Steel	-0.00012" to 0"	ASME B89.1.5	21015A53	00000000
					1.5200 mm to 17.8000 mm	0.02 mm	815	2"	8	Tool Steel	-0.00254 mm to 0 mm	ASME B89.1.5	21015A31	00000000
					1.5300 mm to 17.8100 mm	0.02 mm	815	2"	8	Tool Steel	-0.00254 mm to 0 mm	ASME B89.1.5	21015A33	00000000