Gauge Block Sets

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115 Products

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 0 Gauge Block—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 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.

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.

	Material		Each
Rectangle







	Grade 0 Gauge Block

	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	516-314-26	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
	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	516-302-26	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
	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




			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	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	516-315-26	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 0 Gauge Block

							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 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

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 0 Gauge Block—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 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.

	No. of Pieces	Mfr. Model No.	Includes	Material		Each
Rectangle







				Grade 0 Gauge Block

				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	516-358-26	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
				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
				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
				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
				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
				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
				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
				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
				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


				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




						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	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	516-359-26	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 0 Gauge Block

										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 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

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 0 Gauge Block—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 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.

	No. of Pieces	Mfr. Model No.	Includes	Material	Specs. Met		Each
Inch







				Grade 0 Gauge Block

				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 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	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 Gauge Block

										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 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

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.

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 0 Gauge Block—Grade 0 gauge blocks are our most accurate. They help verify that precise measuring instruments, such as micrometers and calipers, are taking accurate readings.

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

	Material	Specs. Met		Each
Rectangle







	Grade 0 Gauge Block

	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 Gauge Block

					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


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 0 Gauge Block—Grade 0 gauge blocks are our most accurate. They help verify that precise measuring instruments, such as micrometers and calipers, are taking accurate readings.

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

	Material	Specs. Met		Each
Rectangle







	Grade 0 Gauge Block

	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 Gauge Block

					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


	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 0 Gauge Block—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 Block—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 Block—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.

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

	Includes	Material	Certificate Type	Specs. Met		Each
Grade 0 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


	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	00000000


	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	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 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	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

Angle Gauge 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.

No. of Pieces	Includes	Accuracy	Material	Lg.	Thk.		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