Rockwell Hardness Test Block-NIST Traceable-HRCN 25
- 23 holes include (5) 3/8-16 threaded holes for clamping and (18) unopened holes..
- Used for set-up, layout and inspection jobs..
- Ground and hardened on all sides, suitable for all kinds of machine tool..
- It is a hexahedron which is made of hardened steel..
- High accuracy milling parallel clamping block, accuracy up to 0.0001"..