Ultra Precision 1-2-3" Block Set, 2Pcs/Pair .0001", Plastic Case

Product Description 23 Holes Squareness: .0001" Parallelism: +/- .0001" Height Accuracy in Pair: +/-.0001" Hardness: HRC 56-60 Finished from 6-16 micro inches Nominal Tapping: 0.0001" to 0.0003" Product Features 5 holes tapped to 3/8-16 and others untapped Precision ground on all sides Squareness on all sides Surface finish Oversize to allow nominal tapping Product includes Five stainless steel socket head cap screws One hex key Fitted Case