ASME B1.1 – Unified Inch Screw Threads

ASME B1.1 - Unified Inch Screw Threads (UN, UNR, and UNJ Thread Forms) Defines thread specifications, including UNC (Unified National Coarse) and UN8 (8 threads per inch), commonly used for stud bolts. Download the ASME B1.1 pdf standard here ASME B1.1 - Unified Inch Screw Threads (UN, UNR, and UNJ Thread Forms) This Standard specifies the thread form, series, class, allowance, tolerance, and designation for unified screw threads. (In order to emphasize that unified screw threads are based on inch modules, they may be denoted unified inch screw threads.) Several variations in thread form have been developed for unified threads; [...]