ASME B1.12-1987/ANSI Class 5 Interference-Fit Thread

An American National Standard. The American Society of Mechanical Engineers (ASME). Revision of ASME B1.12-1972. Date of Issuance: November 15, 1987. 68 p. This Standard provides dimensional tables for external and internal plastic flow interference-fit (Class 5) threads of modified National thread form in the coarse thread series (NC) in sizes 0.250 in. through 1.500 in.