Precise Precision Ground 1-2-3 Blocks - PBG-123
- Ideal for precision layout & setup
- Each set consists of a matched pair of 1 2 3 blocks, five 3/8-16 stainless steel socket head cap screws, hex key, and shop-hard-molded case
- Each block precision ground on all six surfaces
- Case hardened (HRC 55 60)
- Surface finish from 6 to 16 microinches
- Squareness on all sides to within .0001
- 23 holes: 5 tapped 3/8-16 ; 18 untapped thru holes
- The cross drilling is designed to give minimum weight yet maximum strength
- Oversized to allow for nominal .0001 .0003
NM52PR123
Precision Ground 1-2-3 Blocks
