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115 Products

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).

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.

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.

Inch

Rectangular
Number of Pieces	Manufacturer Model Number	Includes	Material		Each
Grade 0
8	516-126-26	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	516-712-26	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	516-930-26	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	000000
10	516-926-26	Ten blocks in sizes 0.005" to 0.050" in 0.005" increments	Steel	00000000	000000
28	516-918-26	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	516-914-26	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
35	516-314-26	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
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
81	516-302-26	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
Grade AS-1
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	00000000
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	516-915-26	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	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	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
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
Square
Grade 0
8	516-762-26	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
Grade AS-1
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

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

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.

Inch
Number of Pieces	Manufacturer Model Number	Includes	Material	Specifications Met		Each
Grade 0
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	ASME B89.1.9	0000000	0000000
35	516-314-26	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	516-914-26	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	ASME B89.1.9	0000000	00000000
81	516-302-26	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	516-902-26	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	ASME B89.1.9	0000000	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	ASME B89.1.9	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	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 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	000000
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

Gauge Block

Set

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 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 smaller tolerance than Grade AS-2 gauge blocks. They’re the most common grade. Grade AS-2 gauge blocks are useful when extreme accuracy isn’t required, such as quick routine checks. They’re the lowest grade of gauge block.

Sets with an accuracy certificate traceable to NIST certify their sizes are within tolerance. The certificate also lists when each block will require recalibration.

Grade 0
Number of Pieces	Includes	Material	Certification	Specifications Met		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	__	ASME B89.1.9	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	Accuracy Certificate Traceable to NIST	ASME B89.1.9	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	__	ASME B89.1.9	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	Accuracy Certificate Traceable to NIST	ASME B89.1.9	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	__	ASME B89.1.9	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	__	ASME B89.1.9	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	__	ASME B89.1.9	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	__	ASME B89.1.9	0000000	000000

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).

Inch

Rectangular

Square

Rectangular
Number of Pieces	Manufacturer Model Number	Includes	Material	Specifications Met		Each
Grade 0
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	ASME B89.1.9	000000	0000000
28	RS 28.A1	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	ASME B89.1.9	00000000	00000000
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	ASME B89.1.9	000000	00000000
34	RY 34.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 0.500", 1.000", 2.000", and 4.000" Three blocks in sizes 0.100" to 0.300" in 0.1" increments	Ceramic	ASME B89.1.9	00000000	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	ASME B89.1.9	000000	00000000
81	RY 81.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	Ceramic	ASME B89.1.9	00000000	00000000
88	RS 88.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 One block each in sizes 0.063", 0.078", 0.092", 0.100025", 0.10005", 0.100075", and 0.109"	Steel	ASME B89.1.9	00000000	00000000
88	RY 88.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 One block each in sizes 0.063", 0.078", 0.092", 0.100025", 0.10005", 0.100075", and 0.109"	Ceramic	ASME B89.1.9	00000000	00000000
Square
Grade 0
28	SS 28.A1	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	ASME B89.1.9	00000000	00000000
81	SS 81.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	ASME B89.1.9	00000000	00000000
88	SS 88.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 One block each in sizes 0.063", 0.078", 0.092", 0.100025", 0.10005", 0.100075", and 0.109"	Steel	ASME B89.1.9	00000000	00000000

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

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