Step Blocks
Use these blocks to support setup clamps. Fit the nonslip steps together for quick height adjustments.
Height range applies when blocks are used as a pair.
Step | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Ht. Range | Lg. | Wd. | Ht. | Ht. | Dp. | Hole Dia. | Material | Pair | |
| 3/4"-1 5/8" | 1 1/16" | 1" | 11/16" | 1/8" | 1/16" | __ | Steel | 000000 | 00000 |
| 1 1/8"-2 1/2" | 1 39/64" | 1" | 1 1/16" | 1/8" | 1/16" | __ | Steel | 000000 | 0000 |
| 1 3/4"-4" | 2 17/32" | 1 1/2" | 1 43/64" | 1/8" | 1/16" | __ | Steel | 000000 | 00000 |
| 1 3/4"-4" | 2 17/32" | 2" | 1 43/64" | 1/8" | 1/16" | __ | Steel | 0000000 | 00000 |
| 2 1/2"-6" | 3 3/4" | 1" | 2 15/32" | 1/8" | 1/16" | 1" | Steel | 000000 | 00000 |
| 2 1/2"-6" | 3 3/4" | 1 1/2" | 2 15/32" | 1/8" | 1/16" | 1" | Steel | 000000 | 00000 |
| 2 1/2"-6" | 3 3/4" | 2" | 2 15/32" | 1/8" | 1/16" | 1" | Steel | 0000000 | 00000 |
| 3 1/2"-9" | 5 21/64" | 1 1/2" | 3 7/16" | 1/8" | 1/16" | 1 5/8" | Steel | 0000000 | 00000 |
| 3 1/2"-9" | 5 21/64" | 2" | 3 7/16" | 1/8" | 1/16" | 1 5/8" | Steel | 0000000 | 00000 |
| 4 7/8"-10 1/2" | 7 3/16" | 2" | 4 5/8" | 1/8" | 1/16" | __ | Steel | 0000000 | 000000 |
Miniature V-Blocks
Place into larger V-blocks to hold small shafts and cylinders. Set includes two clamps that fit different workpiece diameters.
For technical drawings and 3-D models, click on a part number.
For Workpiece Dia. | Tolerance | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| No. of Pieces | Min. | Max. | Lg. | V Angle | V Dp. | Squareness | Parallel | Material | Machinable | Includes | Each | |
With Clamp | ||||||||||||
| 2 | 1/32" | 9/32" | 2 3/8" | 90° | 1/8" | 0.0002" | 0.0002" | Steel | No | 1 V-Block for 1/32" to 5/32" Workpieces—5/8" Wd. × 1" Ht. × 1/4" V Wd. 1 V-Block for 3/64" to 9/32" Workpieces—3/4" Wd. × 1 1/4" Ht. × 5/16" V Wd. | 00000000 | 0000000 |
Any-Size V-Blocks
To hold and support large or small round or cylindrical workpieces, position these two-piece V-blocks to accommodate any diameter. They are a good choice when frequently changing workpiece sizes.
Tolerance | Mounting Holes | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Max. Workpiece Dia. | Lg. | Wd. | Ht. | Squareness | Parallel | No. of | For Screw Size  | Style | Ctr.-to-Ctr. (A) | Ctr.-to-Ctr. (B) | Mounting Fasteners Included | Material | Machinable | Each | |
| 24" | 2 1/4" | 3 1/2" | 3" | 0.001" | 0.001" | 2 | 1/2" | Counterbored | 1 1/2" | 2 1/2" | No | Steel | No | 0000000 | 0000000 |
Hardened V-Blocks
Use these pairs of blocks to support long, round workpieces—secure with the built-in clamps. They’re machined to identical tolerances for precise alignment.
For technical drawings and 3-D models, click on a part number.
V-Blocks | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Tolerance | Replacement Clamps | |||||||||||||||
| For Max. Workpiece Dia. | Lg. | Wd. | Ht. | Hole Thread Size | V Angle | V Dp. | V Wd. | Squareness | Parallel | Mounting Slot Ht. | Material | Machinable | Pair | Each | ||
With Clamp | ||||||||||||||||
| 1" | 1 5/8" | 1 1/4" | 1 1/4" | 1/4"-20 | 90° | 7/16" | 13/16" | 0.0002" | 0.0002" | 1/4" | Steel | No | 0000000 | 0000000 | 0000000 | 000000 |
| 1 5/8" | 2 1/2" | 2 1/2" | 2" | __ | 90° | 3/4" | 1 1/2" | 0.0002" | 0.0002" | 3/8" | Steel | No | 0000000 | 000000 | 000000 | 00 |
| 2" | 2 1/2" | 3" | 2" | 3/8"-16 | 90° | 3/4" | 1 1/2" | 0.0002" | 0.0002" | 3/8" | Steel | No | 0000000 | 000000 | 0000000 | 00000 |
| 2 7/8" | 3" | 4" | 3" | __ | 90° | 1 3/16" | 2 5/16" | 0.0002" | 0.0002" | 5/8" | Steel | No | 0000000 | 00000000 | 000000 | 00 |
| 3 3/4" | 3" | 5" | 3" | __ | 90° | 1 5/8" | 3 1/4" | 0.0002" | 0.0002" | 5/8" | Steel | No | 0000000 | 00000000 | 000000 | 00 |
| 4 3/8" | 6" | 6" | 4" | __ | 90° | 2" | 4" | 0.0003" | 0.0003" | 5/8" | Steel | No | 0000000 | 00000000 | 000000 | 00 |
| 5 1/4" | 6" | 7" | 4" | __ | 90° | 2 1/2" | 4 15/16" | 0.0003" | 0.0003" | 5/8" | Steel | No | 0000000 | 00000000 | 000000 | 00 |
Economy V-Blocks
Hold and support round workpieces.
For technical drawings and 3-D models, click on a part number.
Tolerance | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Max. Workpiece Dia. | Lg. | Wd. | Ht. | V Angle | V Dp. | V Wd. | Squareness | Parallel | Material | Machinable | Pair | |
Matched Pair | ||||||||||||
| 2 3/8" | 1 1/4" | 3" | 2 3/8" | 90° | 13/16" | 1 3/4" | 0.0012" | 0.0012" | Iron | Yes | 000000 | 000000 |
| 2 15/16" | 1 5/8" | 4" | 2 5/8" | 90° | 1" | 2 3/16" | 0.0012" | 0.0012" | Iron | Yes | 000000 | 00000 |
| 3 1/8" | 2" | 5" | 3 3/16" | 90° | 1 1/8" | 2 3/8" | 0.0016" | 0.0016" | Iron | Yes | 000000 | 000000 |
| 4 5/16" | 2 1/2" | 6" | 3 1/2" | 90° | 1 1/2" | 3 3/16" | 0.002" | 0.002" | Iron | Yes | 000000 | 000000 |
| 4 15/16" | 2" | 6" | 4" | 90° | 2 1/8" | 4 3/16" | 0.002" | 0.002" | Iron | Yes | 0000000 | 000000 |
| 4 15/16" | 4" | 7" | 5 1/2" | 90° | 1 11/16" | 3 5/8" | 0.002" | 0.002" | Iron | Yes | 0000000 | 000000 |
| 6 5/16" | 2 1/2" | 7 1/4" | 5 1/4" | 90° | 2 5/8" | 5 1/8" | 0.0024" | 0.0024" | Iron | Yes | 000000 | 000000 |
| 7 7/8" | 2 7/8" | 8 7/8" | 6 1/2" | 90° | 3 7/16" | 6 11/16" | 0.0024" | 0.0024" | Iron | Yes | 000000 | 000000 |
Machinable V-Blocks
Easier to machine than hardened steel, these blocks can be customized to fit a workpiece. Mount them to a work surface using the side slots and setup clamps.
V-blocks with clamp have a built-in clamp for securing workpieces.
For technical drawings and 3-D models, click on a part number.
Tolerance | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Max. Workpiece Dia. | Lg. | Wd. | Ht. | V Angle | V Dp. | V Wd. | Squareness | Parallel | Mounting Slot Ht. | Material | Pair | |
Standard | ||||||||||||
| 1 5/8" | 2 1/2" | 2 1/2" | 2" | 90° | 3/4" | 1 1/2" | 0.0002" | 0.0002" | 3/8" | Steel | 0000000 | 0000000 |
| 2 7/8" | 3" | 4" | 3" | 90° | 1 3/16" | 2 5/16" | 0.0002" | 0.0002" | 5/8" | Steel | 0000000 | 000000 |
| 3 3/4" | 3" | 5" | 3" | 90° | 1 5/8" | 3 1/4" | 0.0002" | 0.0002" | 5/8" | Steel | 0000000 | 00000000 |
| 4 3/8" | 6" | 6" | 4" | 90° | 2" | 4" | 0.0003" | 0.0003" | 5/8" | Steel | 0000000 | 00000000 |
With Clamp | ||||||||||||
| 1 5/8" | 2 1/2" | 2 1/2" | 2" | 90° | 3/4" | 1 1/2" | 0.0002" | 0.0002" | 3/8" | Steel | 0000000 | 000000 |
| 2 7/8" | 3" | 4" | 3" | 90° | 1 3/16" | 2 5/16" | 0.0002" | 0.0002" | 5/8" | Steel | 0000000 | 00000000 |
| 3 3/4" | 3" | 5" | 3" | 90° | 1 5/8" | 3 1/4" | 0.0002" | 0.0002" | 5/8" | Steel | 0000000 | 00000000 |
| 4 3/8" | 6" | 6" | 4" | 90° | 2" | 4" | 0.0003" | 0.0003" | 5/8" | Steel | 0000000 | 00000000 |
Setup Blocks
Use these tight-tolerance blocks as mounting bases and supports to ensure accurate angles and spacing.
For technical drawings and 3-D models, click on a part number.
Tolerance | |||||||
|---|---|---|---|---|---|---|---|
| Lg. | Wd. | Ht. | Squareness | Parallel | Material | Pair | |
| 1" | 3" | 2" | 0.0001" | 0.0002" | Steel | 0000000 | 0000000 |
Tolerance | Hole | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Lg. | Wd. | Ht. | Squareness | Parallel | Material | Style (No. of) | Dia. | Pair | |
| 1" | 3" | 2" | 0.0001" | 0.0002" | Steel | Unthreaded (1) | 1/2" | 0000000 | 0000000 |
Tolerance | Hole | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Wd. | Ht. | Squareness | Parallel | Material | Style (No. of) | Thread Size | Dia. | Ctr.-to-Ctr. (A) | Ctr.-to-Ctr. (B) | Counterbore Dia. | Pair | |
| 1" | 3" | 2" | 0.0001" | 0.0002" | Steel | Threaded and Counterbored (5) Unthreaded and Counterbored (6) | 5/16"-18 | 11/32" | 1" | 1" | 1/2" | 0000000 | 0000000 |
Tolerance | Hole | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Wd. | Ht. | Squareness | Parallel | Material | Style (No. of) | Thread Size | Dia. | Ctr.-to-Ctr. (A) | Ctr.-to-Ctr. (B) | Pair | |
| 1" | 3" | 2" | 0.0001" | 0.0002" | Steel | Threaded (5) Unthreaded (18) | 3/8"-16 | 25/64" | 37/64" | 41/64" | 0000000 | 0000000 |
| 2" | 4" | 3" | 0.0001" | 0.0003" | Steel | Threaded (5) Unthreaded (18) | 3/8"-16 | 25/64" | 3/4" | 1" | 0000000 | 000000 |
| 2" | 6" | 4" | 0.0001" | 0.0003" | Steel | Threaded (5) Unthreaded (18) | 5/8"-11 | 11/16" | 1 1/8" | 1 1/4" | 0000000 | 000000 |
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 |
Economy 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.
| Number of Pieces | Includes | Material | Each | |
Grade 0 | ||||
|---|---|---|---|---|
| 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.
| Number of Pieces | Manufacturer Model Number | Includes | Material | 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 | 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 |
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 | |||||
|---|---|---|---|---|---|
| 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
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.
| Number of Pieces | Manufacturer Model Number | Includes | Material | 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 | 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 |