Precision-ground surfaces ensure accurate alignment for machine projects
Case-hardened on all sides for enhanced durability and wear resistance
Parallelism and squareness within 0.0002 inch for high-precision work
Multiple threaded and non-threaded holes provide versatile mounting options
Set includes two matched blocks for balanced and reliable use
Summarized by Shop
These precision 1-2-3 blocks are ground and case hardened on all sides to 50-60 Rc. The blocks are 1" by 2" by 3". They are parallel within 0.0002", flat within 0.0002" and square within 0.0002". Each set includes two matched blocks. The blocks have 23 holes through them, 5 are threaded 3/8"-16 NC, and the other through holes are 5/16" diam