AN531 (REV. 5) (NOTICE 1), AIR FORCE-NAVY AERONAUTICAL STANDARD: SCREW, TAPPING, THREAD FORMING OR THREAD CUTTING, 82 DEG., FLAT HEAD, SPACED THREAD (16 JUN 1997)

AN531 (REV. 5) (NOTICE 1), AIR FORCE-NAVY AERONAUTICAL STANDARD: SCREW, TAPPING, THREAD FORMING OR THREAD CUTTING, 82 DEG., FLAT HEAD, SPACED THREAD (16 JUN 1997)., This notice should be filed in front of AN531 REV 5 dated 17 FEBRUARY 1959. AN531 REV 5 is inactive for new design and is no longer used except for replacement purposes.