MS51993A (AMENDMENT 1), MILITARY STANDARD: INSERT, SCREW THREAD - LOCKED IN, RING LOCKED, SERRATED, HIGH STRENGTH (06-AUG-1997

MS51993A (AMENDMENT 1), MILITARY STANDARD: INSERT, SCREW THREAD - LOCKED IN, RING LOCKED, SERRATED, HIGH STRENGTH (06-AUG-1997)., This amendment forms a part of MS51993A, dated 28 Jun 76, and is approved for use by all Departments and Agencies of the Department of Defense.