An American National Standard. The American Society of Mechanical Engineers (ASME). Revision of ANSI B1.16М-1972. Date of Issuance: April 30,1985. 174 p. This Standard provides essential specifications and dimensions for the gages used on M series metric screw threads, and covers the specifications and dimensions for the thread gages and measuring equipment listed in Tables 1 and
2. The basic purpose and use of each gage are also described.