MS-9158 Complete Document History
Bolt-Machine, Steel, 12 Point Head, .250-28, Black Oxide (Superseded by SAE as-9158)

Complete Current Edition:
   REVISION A - BOLT-MACHINE, STEEL, 12 POINT - June 22, 1987

Obsolete Revision Information:
   BASE - BOLT-MACHINE, STEEL, 12 POINT - Jan. 1, 1960