Home>Technical Resources for Fasteners>UNC, UNF and UNEF Thread Table
Bolt Nut Fastener Force Conversion Table

UNC, UNF and UNEF Thread Table

Optimas are a full-service supply chain and manufacturing solutions provider.   Before you design your next product or make updates to an existing product, consider partnering with Optimas to take advantage of our many capabilities.

The table below shows the types of screw threads, sizes, and specifications of Unified Coarse (UNC), Unified Fine (UNF) and Unified Extra Fine (UNEF) threads.

Unified Coarse UNC Unified Fine UNF Thread

Thread sizes are not directly interchangeable.  For guidance only.

Let Us Help You Find Efficiencies