ASME B1.7-2006 Screw Threads: Nomenclature, Definitions, and Letter Symbols

An American National Standard. The American Society of Mechanical Engineers (ASME). Revision of ASME B1.7М-1984. Date of Issuance: November 17, 2006. 38 р. The purpose of this Standard is to establish a uniform practice for standard screw threads with regard to the following:
(a) screw thread nomenclature
(b) letter symbols for the designating features of a screw thread for use on drawings, in tables that set forth dimensional standards, in other records, and for expressing mathematical relationship