Metric Gauge Blocks | McMaster-Carr

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Gauge Blocks

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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.

Grade 0 gauge blocks are our most accurate. They help verify that precise measuring instruments, such as micrometers and calipers, are taking accurate readings. Grade AS-1 gauge blocks have a slightly higher tolerance. They’re the most common grade of gauge block.

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

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

Add wear blocks (not included) on each end of your gauge block combinations to prevent them from wearing down over time.

Rectangular
Gauge Size	Gauge Size Tolerance	Lg.	Wd.	Manufacturer	Material	Specifications Met		Each
Grade 0
0.2mm	-0.00014mm to 0.00014mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	0000000
0.4mm	-0.00014mm to 0.00014mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	000000
0.5mm	-0.00014mm to 0.00014mm	30mm	6mm	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
0.5mm	-0.00014mm to 0.00014mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
0.7mm	-0.00012mm to 0.00012mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
1mm	-0.00012mm to 0.00012mm	30mm	6mm	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
1mm	-0.00012mm to 0.00012mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
1.03mm	-0.00012mm to 0.00012mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
1.1mm	-0.00012mm to 0.00012mm	30mm	6mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
1.2mm	-0.00012mm to 0.00012mm	30mm	6mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
1.3mm	-0.00012mm to 0.00012mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
1.4mm	-0.00012mm to 0.00012mm	30mm	6mm	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
1.4mm	-0.00012mm to 0.00012mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
1.5mm	-0.00012mm to 0.00012mm	30mm	6mm	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
1.5mm	-0.00012mm to 0.00012mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
1.6mm	-0.00012mm to 0.00012mm	30mm	6mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
1.7mm	-0.00012mm to 0.00012mm	30mm	6mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
1.8mm	-0.00012mm to 0.00012mm	30mm	6mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
1.9mm	-0.00012mm to 0.00012mm	30mm	6mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
2mm	-0.00012mm to 0.00012mm	30mm	6mm	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
2mm	-0.00012mm to 0.00012mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
2.5mm	-0.00012mm to 0.00012mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
3mm	-0.00012mm to 0.00012mm	30mm	6mm	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
3mm	-0.00012mm to 0.00012mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
3.5mm	-0.00012mm to 0.00012mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
4mm	-0.00012mm to 0.00012mm	30mm	6mm	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
4mm	-0.00012mm to 0.00012mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
4.5mm	-0.00012mm to 0.00012mm	30mm	6mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
5mm	-0.00012mm to 0.00012mm	30mm	6mm	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
5mm	-0.00012mm to 0.00012mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
5.5mm	-0.00012mm to 0.00012mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
6mm	-0.00012mm to 0.00012mm	30mm	6mm	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
6mm	-0.00012mm to 0.00012mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
6.5mm	-0.00012mm to 0.00012mm	30mm	6mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
7mm	-0.00012mm to 0.00012mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
7.5mm	-0.00012mm to 0.00012mm	30mm	6mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
8mm	-0.00012mm to 0.00012mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
8.5mm	-0.00012mm to 0.00012mm	30mm	6mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
9mm	-0.00012mm to 0.00012mm	30mm	6mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
9.5mm	-0.00012mm to 0.00012mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
10mm	-0.00012mm to 0.00012mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
10mm	-0.00012mm to 0.00012mm	35mm	9mm	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
10.5mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
11mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
11.5mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
11.5mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
12mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
12.5mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
13mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
13mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
13.5mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
14mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
14.5mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
15mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
15.5mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
16mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
16.5mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
17mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
17.5mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
18mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
18.5mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
19mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
19.5mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
20mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
20mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Ceramic	ASME B89.1.9	00000000	000000
20.5mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
21mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
21mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Ceramic	ASME B89.1.9	00000000	000000
21.5mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
22mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
22.5mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
23mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
23.5mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
24mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
24.5mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
25mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
25mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Ceramic	ASME B89.1.9	00000000	000000
30mm	-0.0002mm to 0.0002mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
40mm	-0.0002mm to 0.0002mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
40mm	-0.0002mm to 0.0002mm	35mm	9mm	Mitutoyo	Ceramic	ASME B89.1.9	00000000	000000
50mm	-0.0002mm to 0.0002mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
50mm	-0.0002mm to 0.0002mm	35mm	9mm	Mitutoyo	Ceramic	ASME B89.1.9	00000000	000000
60mm	-0.00025mm to 0.00025mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
70mm	-0.00025mm to 0.00025mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
75mm	-0.00025mm to 0.00025mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
75mm	-0.00025mm to 0.00025mm	35mm	9mm	Mitutoyo	Ceramic	ASME B89.1.9	00000000	000000
80mm	-0.0003mm to 0.0003mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
90mm	-0.0003mm to 0.0003mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
100mm	-0.0003mm to 0.0003mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
100mm	-0.0003mm to 0.0003mm	35mm	9mm	Mitutoyo	Ceramic	ASME B89.1.9	00000000	000000
150mm	-0.0004mm to 0.0004mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	000000
200mm	-0.0005mm to 0.0005mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	000000
300mm	-0.0007mm to 0.0007mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	00000000	000000
400mm	-0.0009mm to 0.0009mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	00000000	000000
500mm	-0.0011mm to 0.0011mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000000
Grade AS-1
0.5mm	-0.0003mm to 0.0003mm	30mm	6mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
0.5mm	-0.0003mm to 0.0003mm	30mm	6mm	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
1mm	-0.0002mm to 0.0002mm	30mm	6mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
1.1mm	-0.0002mm to 0.0002mm	30mm	6mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
1.2mm	-0.0002mm to 0.0002mm	30mm	6mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
1.3mm	-0.0002mm to 0.0002mm	30mm	6mm	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
1.5mm	-0.0002mm to 0.0002mm	30mm	6mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
1.5mm	-0.0002mm to 0.0002mm	30mm	6mm	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
1.8mm	-0.0002mm to 0.0002mm	30mm	6mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
2mm	-0.0002mm to 0.0002mm	30mm	6mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
3mm	-0.0002mm to 0.0002mm	30mm	6mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
3mm	-0.0002mm to 0.0002mm	30mm	6mm	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
4mm	-0.0002mm to 0.0002mm	30mm	6mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
4.5mm	-0.0002mm to 0.0002mm	30mm	6mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
5mm	-0.0002mm to 0.0002mm	30mm	6mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
6mm	-0.0002mm to 0.0002mm	30mm	6mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
6.5mm	-0.0002mm to 0.0002mm	30mm	6mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
7mm	-0.0002mm to 0.0002mm	30mm	6mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
7.5mm	-0.0002mm to 0.0002mm	30mm	6mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
8mm	-0.0002mm to 0.0002mm	30mm	6mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
8mm	-0.0002mm to 0.0002mm	30mm	6mm	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
9mm	-0.0002mm to 0.0002mm	30mm	6mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
9.5mm	-0.0002mm to 0.0002mm	30mm	6mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
10mm	-0.0002mm to 0.0002mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
13mm	-0.0003mm to 0.0003mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
13mm	-0.0003mm to 0.0003mm	35mm	9mm	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
14mm	-0.0003mm to 0.0003mm	35mm	9mm	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
15mm	-0.0003mm to 0.0003mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
17mm	-0.0003mm to 0.0003mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
18mm	-0.0003mm to 0.0003mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
20mm	-0.0003mm to 0.0003mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
20mm	-0.0003mm to 0.0003mm	35mm	9mm	Mitutoyo	Ceramic	ASME B89.1.9	00000000	00000
25mm	-0.0003mm to 0.0003mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
50mm	-0.0004mm to 0.0004mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000
100mm	-0.0006mm to 0.0006mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	00000000	00000

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.

Steel blocks are the most common choice. 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.

Metric
Number of Pieces	Manufacturer Model Number	Includes	Material	Specifications Met		Each
Grade 0
10	516-103-26	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	0000000
47	516-358-26	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	516-958-26	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	516-354-26	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	ASME B89.1.9	0000000	00000000
56	516-954-26	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	516-346-26	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	ASME B89.1.9	0000000	00000000
87	516-946-26	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	000000	00000000
103	516-342-26	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	ASME B89.1.9	0000000	00000000
103	516-942-26	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	516-338-26	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	516-938-26	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
Grade AS-1
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

Gauge Block Set

Rectangular

Square

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.

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

Metric

Rectangular
Number of Pieces	Manufacturer Model Number	Includes	Material		Each
Grade 0
8	516-115-26	One block each in sizes 25, 50, 75, 100, 125, 150, 175, and 200 mm	Steel	00000000	000000000
10	516-103-26	One block each in sizes 1, 1.25, 1.5, 2, 3, 5, 10, 15, 20, and 25 mm	Steel	000000	000000
47	516-958-26	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
47	516-358-26	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
56	516-954-26	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
56	516-354-26	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
87	516-946-26	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	000000	00000000
87	516-346-26	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
103	516-942-26	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
103	516-342-26	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
112	516-938-26	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
112	516-338-26	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
Grade AS-1
8	516-116-26	One block each in sizes 25, 50, 75, 100, 125, 150, 175, and 200 mm	Steel	00000000	00000000
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	516-959-26	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
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
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
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
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
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
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
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
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
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
Square
Grade 0
8	516-752-26	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	516-466-26	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	516-458-26	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	516-450-26	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	516-442-26	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	516-438-26	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
Grade AS-1
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

Starrett Gauge Block Sets with Calibration Certificate

Use the Starrett 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 have been laboratory calibrated and include NIST traceable certification with the tested measurements. The 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 0 means these gauge blocks are our most accurate. They help verify that precise measuring instruments, such as micrometers and calipers, are taking accurate readings.

Use a gauge block holder (not included) to create a custom repeatable measurement by stacking multiple blocks together. To prevent your gauge block combinations from wearing down over time, add wear blocks (not included) on each end.

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

Metric

Rectangular

Square

Rectangular
Number of Pieces	Manufacturer Model Number	Includes	Material	Specifications Met		Each
Grade 0
9	RS 9.MA1	One block each in sizes 1, 2, 2.25, 2.5, 3, 5, 10, 15, and 25 mm	Steel	ASME B89.1.9	000000	0000000
45	RS 45.MA1	Nine blocks in sizes 1 to 9 mm in 1 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 Nine blocks in sizes 10 to 90 mm in 10 mm increments	Steel	ASME B89.1.9	00000000	00000000
45	RY 45.MA1	Nine blocks in sizes 1 to 9 mm in 1 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 Nine blocks in sizes 10 to 90 mm in 10 mm increments	Ceramic	ASME B89.1.9	00000000	00000000
88	RS 88.MA1	19 blocks in sizes 0.5 to 9.5 mm in 0.5 mm increments 49 blocks in sizes 1.01 mm to 1.49 mm in 0.01 mm increments Nine blocks in sizes 1.001 to 1.009 mm in 0.001 mm increments One block in size 1.0005 mm Ten blocks in sizes 10 to 100 mm in 10 mm increments	Steel	ASME B89.1.9	0000000	00000000
88	RY 88.MA1	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 One block in size 1.0005 mm Ten blocks in sizes 10 to 100 mm in 10 mm increments	Ceramic	ASME B89.1.9	00000000	00000000
112	RS 112.MA1	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	00000000	00000000
Square
Grade 0
88	S2S 88.MA1	19 blocks in sizes 0.5 mm to 9.5 mm in 0.5 mm increments 49 blocks in sizes 2.01 to 2.49 mm in 0.01 mm increments Nine blocks in sizes 2.001 to 2.009 mm in 0.001 mm increments One block in size 2.0005 mm Ten blocks in sizes 10 mm to 100 mm in 10 mm increments	Steel	ASME B89.1.9	00000000	00000000
112	S2S 112.MA1	49 blocks in sizes 0.5 to 24.5 mm in 0.5 mm increments 49 blocks in sizes 2.01 to 2.49 mm in 0.01 mm increments Four blocks in sizes 25 to 100 mm in 25 mm increments Nine blocks in sizes 2.001 to 2.009 mm in 0.001 mm increments One block in size 2.0005 mm	Steel	ASME B89.1.9	00000000	00000000