123 Block Set Imperial

Imperial 123 Blocks

Matched pair of 1" x 2" x 3" blocks.

Each block is precision ground on all surfaces.

Case hardened to HRC 55-60.

Squareness on all sides to within 0.0002" per inch.

Features 23 holes: 5 are tapped 3/8 UNC, the other 18 are untapped thru holes.

Part Number 123