Grade AS-1 Gauge Blocks | McMaster-Carr

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220 Products

Gauge Blocks

A true source of measurement, use these gauge blocks to calibrate measuring equipment, mark precise layouts, or position your fixture or machine components just right. All blocks include a certificate of compliance to certify their sizes are within tolerance. The certificate also lists when each block will require recalibration.

Each block has a grade per ASME B89.1.9. Grades are based on tolerance—the smaller the tolerance, the greater the accuracy.

Use a gauge block holder (not included) to create a custom repeatable measurement by stacking multiple blocks together.

Square—Square blocks have a hole that runs through their center. Stack multiple square blocks together and secure them with a rod (not included).

Grade AS-1 Gauge Block—Grade AS-1 gauge blocks have a slightly higher tolerance. They’re the most common grade of gauge block.

Ceramic—Ceramic blocks are more resistant to wear and corrosion than steel blocks. They won’t expand or contract as temperatures change. Use them in cleanrooms—they’re nonmagnetic so they won’t pick up any iron or dust.

Steel—Steel blocks are the most common choice for gauge blocks.

	Gauge Size	Gauge Size Tolerance	Lg.	Wd.	Mfr.	Material	Specs. Met		Each
Rectangle







				Grade AS-1 Gauge Block

				0.004"	-0.000012" to 0.000012"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	0000000


				0.005"	-0.000012" to 0.000012"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	000000
				0.006"	-0.000012" to 0.000012"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	000000
				0.008"	-0.000012" to 0.000012"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
				0.01"	-0.000012" to 0.000012"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
				0.015"	-0.000012" to 0.000012"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
				0.02"	-0.000012" to 0.000012"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
				0.024"	-0.000012" to 0.000012"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
				0.025"	-0.000012" to 0.000012"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
				0.027"	-0.000012" to 0.000012"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
				0.028"	-0.000012" to 0.000012"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000


				0.03"	-0.000012" to 0.000012"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
				0.03125"	-0.000012" to 0.000012"	1.181"	0.35"	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
				0.04"	-0.000012" to 0.000012"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
				0.041"	-0.000012" to 0.000012"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
				0.042"	-0.000012" to 0.000012"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
				0.043"	-0.000012" to 0.000012"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
				0.044"	-0.000012" to 0.000012"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
				0.045"	-0.000012" to 0.000012"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
				0.049"	-0.000012" to 0.000012"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
				0.05"	-0.000012" to 0.000012"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000


				0.06"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
				0.0625"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
				0.07"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
				0.078125"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
				0.08"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
				0.09"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
				0.1"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
				0.10005"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
				0.1001"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
				0.1002"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000


				0.1003"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
				0.1004"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
				0.1005"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
				0.1006"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
				0.1007"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
				0.1008"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
				0.101"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
				0.102"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
				0.103"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
				0.104"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000


				0.105"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
				0.106"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
				0.107"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
				0.108"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.109"				-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.11"	-0.000008" to 0.000008"			1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.111"	-0.000008" to 0.000008"			1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.112"	-0.000008" to 0.000008"			1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.113"	-0.000008" to 0.000008"			1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.114"	-0.000008" to 0.000008"	1.181"		0.35"	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
0.114"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.115"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.116"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.117"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
0.117"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.118"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.119"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
0.119"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.12"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.121"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.122"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.123"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.124"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.125"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.126"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.127"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.128"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.129"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.13"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.131"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.132"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.133"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.134"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.135"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
0.135"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.136"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.137"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.138"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
0.138"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.139"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.14"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.141"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.142"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.143"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
0.143"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.144"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.145"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.146"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.147"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
0.147"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.148"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.149"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
0.149"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.15"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.16"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.17"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.19"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.2"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.25"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.3"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.35"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.375"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.4"	-0.000008" to 0.000008"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.45"	-0.000012" to 0.000012"	1.378"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.5"	-0.000012" to 0.000012"	1.378"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.55"	-0.000012" to 0.000012"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.6"	-0.000012" to 0.000012"	1.378"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.65"	-0.000012" to 0.000012"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.7"	-0.000012" to 0.000012"	1.378"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.75"	-0.000012" to 0.000012"	1.378"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.8"	-0.000012" to 0.000012"	1.181"	0.35"	Mitutoyo	Ceramic	ASME B89.1.9	00000000	000000
0.8"	-0.000012" to 0.000012"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.85"	-0.000012" to 0.000012"	1.181"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.9"	-0.000012" to 0.000012"	1.378"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.95"	-0.000012" to 0.000012"	1.378"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
1"	-0.000012" to 0.000012"	1.378"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
2"	-0.000016" to 0.000016"	1.378"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
3"	-0.00002" to 0.00002"	1.378"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
4"	-0.000024" to 0.000024"	1.378"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
5"	-0.000032" to 0.000032"	1.378"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	000000
6"	-0.000032" to 0.000032"	1.378"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	000000
8"	-0.00004" to 0.00004"	1.378"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	000000
12"	-0.000056" to 0.000056"	1.378"	0.35"	Mitutoyo	Steel	ASME B89.1.9	00000000	000000
0.5 mm	-0.0003 mm to 0.0003 mm	30 mm	9 mm	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
0.5 mm	-0.0003 mm to 0.0003 mm	30 mm	9 mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
1 mm	-0.0002 mm to 0.0002 mm	30 mm	9 mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
1.1 mm	-0.0002 mm to 0.0002 mm	30 mm	9 mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
1.2 mm	-0.0002 mm to 0.0002 mm	30 mm	9 mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
1.3 mm	-0.0002 mm to 0.0002 mm	30 mm	9 mm	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
1.5 mm	-0.0002 mm to 0.0002 mm	30 mm	9 mm	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
1.5 mm	-0.0002 mm to 0.0002 mm	30 mm	9 mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
1.8 mm	-0.0002 mm to 0.0002 mm	30 mm	9 mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
2 mm	-0.0002 mm to 0.0002 mm	30 mm	9 mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
3 mm	-0.0002 mm to 0.0002 mm	30 mm	9 mm	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
3 mm	-0.0002 mm to 0.0002 mm	30 mm	9 mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
4 mm	-0.0002 mm to 0.0002 mm	30 mm	9 mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
4.5 mm	-0.0002 mm to 0.0002 mm	30 mm	9 mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
5 mm	-0.0002 mm to 0.0002 mm	30 mm	9 mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
6 mm	-0.0002 mm to 0.0002 mm	30 mm	9 mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
6.5 mm	-0.0002 mm to 0.0002 mm	30 mm	9 mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
7 mm	-0.0002 mm to 0.0002 mm	30 mm	9 mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
7.5 mm	-0.0002 mm to 0.0002 mm	30 mm	9 mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
8 mm	-0.0002 mm to 0.0002 mm	30 mm	9 mm	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
8 mm	-0.0002 mm to 0.0002 mm	30 mm	9 mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
9 mm	-0.0002 mm to 0.0002 mm	30 mm	9 mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
9.5 mm	-0.0002 mm to 0.0002 mm	30 mm	9 mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
10 mm	-0.0002 mm to 0.0002 mm	30 mm	9 mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
13 mm	-0.0003 mm to 0.0003 mm	35 mm	9 mm	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
13 mm	-0.0003 mm to 0.0003 mm	35 mm	9 mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
14 mm	-0.0003 mm to 0.0003 mm	35 mm	9 mm	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
15 mm	-0.0003 mm to 0.0003 mm	35 mm	9 mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
17 mm	-0.0003 mm to 0.0003 mm	35 mm	9 mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
18 mm	-0.0003 mm to 0.0003 mm	35 mm	9 mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
20 mm	-0.0003 mm to 0.0003 mm	35 mm	9 mm	Mitutoyo	Ceramic	ASME B89.1.9	00000000	000000
20 mm	-0.0003 mm to 0.0003 mm	35 mm	9 mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
25 mm	-0.0003 mm to 0.0003 mm	35 mm	9 mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
50 mm	-0.0004 mm to 0.0004 mm	35 mm	9 mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
100 mm	-0.0006 mm to 0.0006 mm	35 mm	9 mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000

Square







				Grade AS-1 Gauge Block

				0.05"	-0.000012" to 0.000012"	0.95"	0.95"	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000


				0.0625"	-0.000008" to 0.000008"	0.95"	0.95"	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
				0.1"	-0.000008" to 0.000008"	0.95"	0.95"	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
				0.2"	-0.000008" to 0.000008"	0.95"	0.95"	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
				0.25"	-0.000008" to 0.000008"	0.95"	0.95"	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
				0.35"	-0.000008" to 0.000008"	0.95"	0.95"	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
				0.4"	-0.000008" to 0.000008"	0.95"	0.95"	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
				0.5"	-0.000012" to 0.000012"	0.95"	0.95"	Mitutoyo	Ceramic	ASME B89.1.9	00000000	000000
				1"	-0.000012" to 0.000012"	0.95"	0.95"	Mitutoyo	Ceramic	ASME B89.1.9	00000000	000000
				2"	-0.000016" to 0.000016"	0.95"	0.95"	Mitutoyo	Ceramic	ASME B89.1.9	00000000	000000
				3"	-0.00002" to 0.00002"	0.95"	0.95"	Mitutoyo	Steel	ASME B89.1.9	00000000	000000


				4"	-0.000024" to 0.000024"	0.95"	0.95"	Mitutoyo	Steel	ASME B89.1.9	00000000	000000
				5"	-0.000032" to 0.000032"	0.95"	0.95"	Mitutoyo	Steel	ASME B89.1.9	00000000	000000
				6"	-0.000032" to 0.000032"	0.95"	0.95"	Mitutoyo	Steel	ASME B89.1.9	00000000	000000
				7"	-0.00004" to 0.00004"	0.95"	0.95"	Mitutoyo	Steel	ASME B89.1.9	00000000	000000
				8"	-0.00004" to 0.00004"	0.95"	0.95"	Mitutoyo	Steel	ASME B89.1.9	00000000	000000

Mitutoyo Gauge Block Sets with Calibration Certificate

Use the Mitutoyo gauge blocks in these sets individually or together to take precise measurements or calibrate your measuring tools. They are often used to mark layouts, align machine components, and check that parts are within tolerance. All come with a certificate traceable to NIST to certify they were calibrated in a lab and meet tight tolerances. The blocks are individually numbered for recalibration.

Put multiple gauge blocks together in a gauge holder (not included) to create a custom repeatable measurement. Add wear blocks (not included) on each end to prevent your gauge block combinations from wearing down over time.

Each block has a grade per ASME B89.1.9. Grades are based on tolerance—the smaller the tolerance, the greater the accuracy.

Grade AS-1 Gauge Block—Grade AS-1 gauge blocks have a slightly higher tolerance. They’re the most common grade of gauge block.

Optical Flat—Sets with an optical flat come with a polished glass disc to inspect gauge blocks for wear. Place the optical flat on the block and look at the resulting light pattern—if the lines you see are curved, the block is worn.

Steel—Steel blocks are the most common choice for gauge blocks.

	Material	Specs. Met		Each
Inch







	Grade AS-1 Gauge Block

	9	516-931-26	One block each in sizes 0.0625", 0.100", 0.125", 0.200", 0.250", 0.300", 0.500", 1.000", and 2.000" Optical Flat	Steel	ASME B89.1.9	0000000	0000000


	9	516-935-26	One block each in sizes 0.0625", 0.100", 0.125", 0.200", 0.250", 0.300", 0.500", 1.000", and 2.000"	Steel	ASME B89.1.9	0000000	000000
	35	516-315-26	Nine blocks in sizes 0.1001" to 0.1009" in 0.0001" increments Nine blocks in sizes 0.101" to 0.109" in 0.001" increments Nine blocks in sizes 0.110" to 0.190" in 0.01" increments One block each in sizes 0.500", 1.000", 2.000", and 4.000" One block in size 0.10005" Three blocks in sizes 0.100" to 0.300" in 0.1" increments	Ceramic	ASME B89.1.9	0000000	00000000
	35	516-915-26	Nine blocks in sizes 0.1001" to 0.1009" in 0.0001" increments Nine blocks in sizes 0.101" to 0.109" in 0.001" increments Nine blocks in sizes 0.110" to 0.190" in 0.01" increments One block each in sizes 0.500", 1.000", 2.000", and 4.000" One block in size 0.10005" Three blocks in sizes 0.100" to 0.300" in 0.1" increments	Steel	ASME B89.1.9	0000000	00000000
	81	516-303-26	19 blocks in sizes 0.050" to 0.950" in 0.05" increments 49 blocks in sizes 0.101" to 0.149" in 0.001" increments Four blocks in sizes 1.000" to 4.000" in 1" increments Nine blocks in sizes 0.1001" to 0.1009" in 0.0001" increments	Ceramic	ASME B89.1.9	0000000	00000000
	81	516-903-26	19 blocks in sizes 0.050" to 0.950" in 0.05" increments 49 blocks in sizes 0.101" to 0.149" in 0.001" increments Four blocks in sizes 1.000" to 4.000" in 1" increments Nine blocks in sizes 0.1001" to 0.1009" in 0.0001" increments	Steel	ASME B89.1.9	0000000	00000000


	Metric







					Grade AS-1 Gauge Block

					10	516-101-26	One block each in sizes 1, 1.25, 1.5, 2, 3, 5, 10, 15, 20, and 25 mm	Steel	ASME B89.1.9	000000	000000


					47	516-359-26	24 blocks in sizes 1 to 24 mm in 1 mm increments Four blocks in sizes 25 to 100 mm in 25 mm increments Nine blocks in sizes 1.01 to 1.09 mm in 0.01 mm increments Nine blocks in sizes 1.1 to 1.9 mm in 0.1 mm increments One block in size 1.005 mm	Ceramic	ASME B89.1.9	0000000	00000000
					47	516-959-26	24 blocks in sizes 1 to 24 mm in 1 mm increments Four blocks in sizes 25 to 100 mm in 25 mm increments Nine blocks in sizes 1.01 to 1.09 mm in 0.01 mm increments Nine blocks in sizes 1.1 to 1.9 mm in 0.1 mm increments One block in size 1.005 mm	Steel	ASME B89.1.9	0000000	00000000
					56	516-955-26	24 blocks in sizes 1 to 24 mm in 1 mm increments Four blocks in sizes 25 to 100 mm in 25 mm increments Nine blocks in sizes 1.001 to 1.009 mm in 0.001 mm increments Nine blocks in sizes 1.01 to 1.09 mm in 0.01 mm increments Nine blocks in sizes 1.1 to 1.9 mm in 0.1 mm increments One block in size 0.5 mm	Steel	ASME B89.1.9	0000000	00000000
					87	516-947-26	19 blocks in sizes 0.5 to 9.5 mm in 0.5 mm increments 49 blocks in sizes 1.01 to 1.49 mm in 0.01 mm increments Nine blocks in sizes 1.001 to 1.009 mm in 0.001 mm increments Ten blocks in sizes 10 to 100 mm in 10 mm increments	Steel	ASME B89.1.9	0000000	00000000
					103	516-943-26	49 blocks in sizes 0.5 to 24.5 mm in 0.5 mm increments 49 blocks in sizes 1.01 to 1.49 mm in 0.01 mm increments Four blocks in sizes 25 to 100 mm in 25 mm increments One block in size 1.005 mm	Steel	ASME B89.1.9	0000000	00000000
					112	516-339-26	49 blocks in sizes 0.5 to 24.5 mm in 0.5 mm increments 49 blocks in sizes 1.01 to 1.49 mm in 0.01 mm increments Four blocks in sizes 25 to 100 mm in 25 mm increments Nine blocks in sizes 1.001 to 1.009 mm in 0.001 mm increments One block in size 1.0005 mm	Ceramic	ASME B89.1.9	0000000	00000000
					112	516-939-26	49 blocks in sizes 0.5 to 24.5 mm in 0.5 mm increments 49 blocks in sizes 1.01 to 1.49 mm in 0.01 mm increments Four blocks in sizes 25 to 100 mm in 25 mm increments Nine blocks in sizes 1.001 to 1.009 mm in 0.001 mm increments One block in size 1.0005 mm	Steel	ASME B89.1.9	0000000	00000000

Mitutoyo Gauge Block Sets

Use the Mitutoyo gauge blocks in these sets individually or together to take precise measurements or calibrate your measuring tools. They are often used to mark layouts, align machine components, and check that parts are within tolerance. All blocks include a certificate of compliance to certify their sizes are within tolerance. The certificate also lists when each block will require recalibration.

Put multiple gauge blocks together in a gauge holder (not included) to create a custom repeatable measurement. Add wear blocks (not included) on each end of your gauge block combinations to prevent them from wearing down over time.

Each block has a grade per ASME B89.1.9. Grades are based on tolerance—the smaller the tolerance, the greater the accuracy.

Inch


Rectangle	Square

Square—Square blocks have a hole that runs through their center. Stack multiple square blocks together and secure them with a rod (not included).

Grade AS-1 Gauge Block—Grade AS-1 gauge blocks have a slightly higher tolerance. They’re the most common grade of gauge block.

Steel—Steel blocks are the most common choice for gauge blocks.

	Material		Each
Rectangle







	Grade AS-1 Gauge Block

	8	516-127-26	One block each in sizes 1.000", 2.000", 3.000", 4.000", 5.000", 6.000", 7.000", and 8.000"	Steel	00000000	000000000


	8	516-713-26	Three blocks in sizes 5.000" to 7.000" in 1" increments Three blocks in sizes 8.000", 10.000", and 12.000" in 2" increments Two blocks in sizes 16.000" and 20.000" in 4" increments	Steel	00000000	00000000
	9	516-931-26	One block each in sizes 0.0625", 0.100", 0.125", 0.200", 0.250", 0.300", 0.500", 1.000", and 2.000" Optical Flat	Steel	0000000	000000
	9	516-935-26	One block each in sizes 0.0625", 0.100", 0.125", 0.200", 0.250", 0.300", 0.500", 1.000", and 2.000"	Steel	0000000	000000
	10	516-927-26	Ten blocks in sizes 0.005" to 0.050" in 0.005" increments	Steel	00000000	000000
	28	516-919-26	Nine blocks in sizes 0.010" to 0.090" in 0.01" increments Nine blocks in sizes 0.0201" to 0.0209" in 0.0001" increments Nine blocks in sizes 0.021" to 0.029" in 0.001" increments One block in size 0.02005"	Steel	00000000	00000000
	35	516-315-26	Nine blocks in sizes 0.1001" to 0.1009" in 0.0001" increments Nine blocks in sizes 0.101" to 0.109" in 0.001" increments Nine blocks in sizes 0.110" to 0.190" in 0.01" increments One block each in sizes 0.500", 1.000", 2.000", and 4.000" One block in size 0.10005" Three blocks in sizes 0.100" to 0.300" in 0.1" increments	Ceramic	00000000	00000000
	35	516-915-26	Nine blocks in sizes 0.1001" to 0.1009" in 0.0001" increments Nine blocks in sizes 0.101" to 0.109" in 0.001" increments Nine blocks in sizes 0.110" to 0.190" in 0.01" increments One block each in sizes 0.500", 1.000", 2.000", and 4.000" One block in size 0.10005" Three blocks in sizes 0.100" to 0.300" in 0.1" increments	Steel	00000000	00000000
	81	516-303-26	19 blocks in sizes 0.050" to 0.950" in 0.05" increments 49 blocks in sizes 0.101" to 0.149" in 0.001" increments Four blocks in sizes 1.000" to 4.000" in 1" increments Nine blocks in sizes 0.1001" to 0.1009" in 0.0001" increments	Ceramic	00000000	00000000
	81	516-903-26	19 blocks in sizes 0.050" to 0.950" in 0.05" increments 49 blocks in sizes 0.101" to 0.149" in 0.001" increments Four blocks in sizes 1.000" to 4.000" in 1" increments Nine blocks in sizes 0.1001" to 0.1009" in 0.0001" increments	Steel	00000000	00000000


	Square







					Grade AS-1 Gauge Block

					8	516-763-26	Three blocks in sizes 5.000" to 7.000" in 1" increments Three blocks in sizes 8.000", 10.000", and 12.000" in 2" increments Two blocks in sizes 16.000" and 20.000" in 4" increments	Steel	00000000	00000000

Metric


Rectangle	Square

Square—Square blocks have a hole that runs through their center. Stack multiple square blocks together and secure them with a rod (not included).

Grade AS-1 Gauge Block—Grade AS-1 gauge blocks have a slightly higher tolerance. They’re the most common grade of gauge block.

Steel—Steel blocks are the most common choice for gauge blocks.

	Material		Each
Rectangle







	Grade AS-1 Gauge Block

	8	516-116-26	One block each in sizes 25, 50, 75, 100, 125, 150, 175, and 200 mm	Steel	00000000	000000000


	10	516-101-26	One block each in sizes 1, 1.25, 1.5, 2, 3, 5, 10, 15, 20, and 25 mm	Steel	000000	000000
	47	516-359-26	24 blocks in sizes 1 to 24 mm in 1 mm increments Four blocks in sizes 25 to 100 mm in 25 mm increments Nine blocks in sizes 1.01 to 1.09 mm in 0.01 mm increments Nine blocks in sizes 1.1 to 1.9 mm in 0.1 mm increments One block in size 1.005 mm	Ceramic	00000000	00000000
	47	516-959-26	24 blocks in sizes 1 to 24 mm in 1 mm increments Four blocks in sizes 25 to 100 mm in 25 mm increments Nine blocks in sizes 1.01 to 1.09 mm in 0.01 mm increments Nine blocks in sizes 1.1 to 1.9 mm in 0.1 mm increments One block in size 1.005 mm	Steel	00000000	00000000
	56	516-355-26	24 blocks in sizes 1 to 24 mm in 1 mm increments Four blocks in sizes 25 to 100 mm in 25 mm increments Nine blocks in sizes 1.001 to 1.009 mm in 0.001 mm increments Nine blocks in sizes 1.01 to 1.09 mm in 0.01 mm increments Nine blocks in sizes 1.1 to 1.9 mm in 0.1 mm increments One block in size 0.5 mm	Ceramic	00000000	00000000
	56	516-955-26	24 blocks in sizes 1 to 24 mm in 1 mm increments Four blocks in sizes 25 to 100 mm in 25 mm increments Nine blocks in sizes 1.001 to 1.009 mm in 0.001 mm increments Nine blocks in sizes 1.01 to 1.09 mm in 0.01 mm increments Nine blocks in sizes 1.1 to 1.9 mm in 0.1 mm increments One block in size 0.5 mm	Steel	00000000	00000000
	87	516-347-26	19 blocks in sizes 0.5 to 9.5 mm in 0.5 mm increments 49 blocks in sizes 1.01 to 1.49 mm in 0.01 mm increments Nine blocks in sizes 1.001 to 1.009 mm in 0.001 mm increments Ten blocks in sizes 10 to 100 mm in 10 mm increments	Ceramic	00000000	00000000
	87	516-947-26	19 blocks in sizes 0.5 to 9.5 mm in 0.5 mm increments 49 blocks in sizes 1.01 to 1.49 mm in 0.01 mm increments Nine blocks in sizes 1.001 to 1.009 mm in 0.001 mm increments Ten blocks in sizes 10 to 100 mm in 10 mm increments	Steel	00000000	00000000
	103	516-343-26	49 blocks in sizes 0.5 to 24.5 mm in 0.5 mm increments 49 blocks in sizes 1.01 to 1.49 mm in 0.01 mm increments Four blocks in sizes 25 to 100 mm in 25 mm increments One block in size 1.005 mm	Ceramic	00000000	00000000
	103	516-943-26	49 blocks in sizes 0.5 to 24.5 mm in 0.5 mm increments 49 blocks in sizes 1.01 to 1.49 mm in 0.01 mm increments Four blocks in sizes 25 to 100 mm in 25 mm increments One block in size 1.005 mm	Steel	00000000	00000000
	112	516-339-26	49 blocks in sizes 0.5 to 24.5 mm in 0.5 mm increments 49 blocks in sizes 1.01 to 1.49 mm in 0.01 mm increments Four blocks in sizes 25 to 100 mm in 25 mm increments Nine blocks in sizes 1.001 to 1.009 mm in 0.001 mm increments One block in size 1.0005 mm	Ceramic	00000000	00000000


	112	516-939-26	49 blocks in sizes 0.5 to 24.5 mm in 0.5 mm increments 49 blocks in sizes 1.01 to 1.49 mm in 0.01 mm increments Four blocks in sizes 25 to 100 mm in 25 mm increments Nine blocks in sizes 1.001 to 1.009 mm in 0.001 mm increments One block in size 1.0005 mm	Steel	00000000	00000000


	Square







					Grade AS-1 Gauge Block

					8	516-753-26	Three blocks in sizes 125, 150, 175 mm in 25 mm increments Three blocks in sizes 300, 400, and 500 mm in 100 mm increments Two blocks in sizes 200 and 250 mm in 50 mm increments	Steel	00000000	00000000


					32	516-467-26	Nine blocks in sizes 1 to 9 mm in 1 mm increments Nine blocks in sizes 1.01 to 1.09 mm in 0.01 mm increments Nine blocks in sizes 1.1 to 1.9 mm in 0.1 mm increments One block in size 1.005 mm One block in size 60 mm Three blocks in sizes 10 to 30 mm in 10 mm increments	Steel	00000000	00000000
					47	516-459-26	24 blocks in sizes 1 to 24 mm in 1 mm increments Four blocks in sizes 25 to 100 mm in 25 mm increments Nine blocks in sizes 1.01 to 1.09 mm in 0.01 mm increments Nine blocks in sizes 1.1 to 1.9 mm in 0.1 mm increments One block in size 1.005 mm	Steel	00000000	00000000
					76	516-451-26	19 blocks in sizes 0.5 to 9.5 mm in 0.5 mm increments 49 blocks in sizes 1.01 to 1.49 mm in 0.01 mm increments Four blocks in sizes 10 to 40 mm in 10 mm increments One block in size 1.005 mm Three blocks in sizes 50 to 100 mm in 25 mm increments	Steel	00000000	00000000
					103	516-443-26	49 blocks in sizes 0.5 to 24.5 mm in 0.5 mm increments 49 blocks in sizes 1.01 to 1.49 mm in 0.01 mm increments Four blocks in sizes 25 to 100 mm in 25 mm increments One block in size 1.005 mm	Steel	00000000	00000000
					112	516-439-26	49 blocks in sizes 0.5 to 24.5 mm in 0.5 mm increments 49 blocks in sizes 1.01 to 1.49 mm in 0.01 mm increments Four blocks in sizes 25 to 100 mm in 25 mm increments Nine blocks in sizes 1.001 to 1.009 mm in 0.001 mm increments One block in size 1.005 mm	Steel	00000000	00000000

Gauge Block Sets


	Gauge Block

Use the gauge blocks in these sets individually or together to take precise measurements or calibrate your measuring tools. They are often used to mark layouts, align machine components, and check that parts are within tolerance. All blocks are individually numbered for recalibration.

Each block has a grade per ASME B89.1.9. Grades are based on tolerance—the smaller the tolerance, the greater the accuracy.

Grade AS-1 Gauge Block—Grade AS-1 gauge blocks have a smaller tolerance than Grade AS-2 gauge blocks. They’re the most common grade.

	Includes	Material	Specs. Met		Each
Grade AS-1 Gauge Block



	36	Five blocks in sizes 0.100" to 0.500" in 0.1" increments Nine blocks in sizes 0.1001" to 0.1009" in 0.0001" increments Nine blocks in sizes 0.101" to 0.109" in 0.001" increments Nine blocks in sizes 0.110" to 0.190" in 0.01" increments One block each in sizes 0.050", 1.000", 2.000", and 4.000"	Steel	ASME B89.1.9	0000000	0000000


	81	19 blocks in sizes 0.050" to 0.950" in 0.05" increments 49 blocks in sizes 0.101" to 0.149" in 0.001" increments Four blocks in sizes 1.000" to 4.000" in 1" increments Nine blocks in sizes 0.1001" to 0.1009" in 0.0001" increments	Steel	ASME B89.1.9	0000000	000000