2-4-6 Blocks Matched Pair (2) 23 Holes

2-4-6 blocks are used for machine set up, layout, and inspection. Contains 23 5/8" through holes (5 holes tapped with 5/8" x 11 TPI threads and 18 untapped) Made of hardened tool steel (RC 55-62) Precision ground on all six sides Overall size within +/- 0.0003" Flatness and parallelism within 0.0003" Squareness on all sides to within 0.0003" Pairs are matched to a tolerance of 0.0002" Two (2) pieces per set WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov