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28 Products

Mitutoyo Gauge Block Sets

Use these gauge block sets for precision layout, machine setup, and producing close-tolerance dies and fixtures. They 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.

Grade 0
Number of Pieces	Manufacturer Model Number	Includes	Material		Each
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

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.

Grade 0
Number of Pieces	Manufacturer Model Number	Includes	Material		Each
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

Economy Gauge Block Sets

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.

Grade 0
Number of Pieces	Includes	Material		Each
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	0000000	0000000
47	19 blocks in sizes 1.01 to 1.19 mm in 0.01 mm increments Eight blocks in sizes 1.2 to 1.9 mm in 0.1 mm increments Nine blocks in sizes 20 to 100 mm in 10 mm increments One block in size 1.005 mm Ten blocks in sizes 1 to 10 mm in 1 mm increments	Steel	000000	000000
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	0000000	00000000
87	17 blocks in sizes 2 to 10 mm in 0.5 mm increments 50 blocks in sizes 1.01 to 1.50 mm in 0.01 mm increments Nine blocks in sizes 1.001 to 1.009 mm in 0.001 mm increments Nine blocks in sizes 20 to 100 mm in 10 mm increments One 0.5 mm block One 1 mm block	Steel	000000	000000
Grade AS-1
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	0000000	000000
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	0000000	000000
Grade AS-2
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	0000000	000000
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	0000000	000000

Starrett Gauge Block Sets

Often used for precision layout, machine setup, and producing close-tolerance dies and fixtures, these gauge 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.

Grade 0
Number of Pieces	Manufacturer Model Number	Includes	Material		Each
9	RS9.A1	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	000000	0000000
34	RS34.A1	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 0.100", 0.200", 0.300", 0.500", 1.000", 2.000", and 4.000"	Steel	000000	00000000
81	RS81.A1	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	000000	00000000

Angle Block Sets

Create and check angles with these precision-ground blocks. Each block is labeled with its angle. Use them to assist in machine setup, precision layout, and inspection processes. Combine multiple blocks to create a specific angle. For example, stack the 20° block and the 2° block to make a 22° angle.

Number of Pieces	Includes	Accuracy	Material	Lg.	Thick.		Each
12	One block each in angles 0.25°, 0.5°, 1°, 2°, 3°, 4°, 5°, 10°, 15°, 20°, 25°, and 30°	±0.042°	Steel	3"	1/4"	0000000	0000000