Precision Milling Tools ALL-CARB 5 Pair Of 1-2-3 Blocks Matched Pair With 23 Holes Precision Machinist Milling 0.0002 Inch Milling Machine Jig 2-4-6 Blocks Package includes:2 x 2-4-6 machinist set up blocks Specification:, Squareness on all sides within 0.0003 inch, Overall size is within /- 0.0003 inch, Flatness and parallelism within 0.0003 inch, Pairs... Robust and durable - Made of precision-grade tool steel hardened and precise ground on all 6 sides of block, heat treated and case hardened to HRC 57-62 Labwork 2 Matched Pair 2-4-6 Blocks 23 Holes .0002 Machinist Precision Feature - Cross drilling design gives minimum weight and maximum strength Unique design - 23 holes consists of 5 tapped holes that are 3/8-11 for clamping and 18 tapped holes untapped holes SPI 2-4-6 Block Set - 13-671-3. Hardened steel to RC 55-60, ground to surface finish 6-16 microinches. Matched 2-4-6 Blocks. within 0.0003" per inch. 0.0003 Squareness Per Inch, Hardened Steel, 2-4-6 Block with 23 Hole Setup Block. See all SPI 1-2-3, 2-3-4 and 2-4-6 Block Sets Precision:2-4-6 Blocks Matched PairOverall size is within +/- ., 0003. Squareness on all sides to within 0., 0003. Flatness and parallelism are within ., 0003.
