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Mitutoyo Gauge Block Sets with Calibration Certificate



These sets come with a certificate of calibration traceable to NIST that states they’ve passed a test for accuracy. They’re used for precision layout, machine setup, and producing close-tolerance dies and fixtures. Blocks are high-carbon, high-chrome steel and have excellent stability and resistance to thermal expansion.
Gauge blocks are classified by grade based on tolerance—the smaller the tolerance, the greater the accuracy. All blocks are individually numbered for recalibration at a later date.
Size refers to the distance between the block’s two measuring surfaces.
For technical drawings and 3-D models, click on a part number.
Number of Pieces | Manufacturer Model Number | Includes | Material | Each | |
Grade 0 | |||||
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9 | 516-930-26 | 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 | 0000000 |
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 |
35 | 516-914-26 | 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 One block each in sizes 0.200", 0.300", 0.500", 1.000", 2.000", and 4.000" One block in size 0.10005" Ten blocks in sizes 0.100" to 0.190" in 0.01" increments | Steel | 0000000 | 00000000 |
81 | 516-902-26 | 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 | 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 | 000000 | 00000000 |
Grade AS-1 | |||||
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 | 516-101-26 | One block each in sizes 1, 1.25, 1.5, 2, 3, 5, 10, 15, 20, and 25 mm. | Steel | 000000 | 000000 |