AN509
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- AN509, AIR FORCE - NAVY AERONAUTICAL STANDARD, SCREW-MACHINE, FLAT HEAD, 100 DEG., STRUCTURAL (17 FEB 1959 [S/S BY MS24694]
- MS24694C, MILITARY STANDARD, SCREW, MACHINE, FLAT COUNTERSUNK HEAD, 100 DEG., STRUCTURAL, CROSS RECESSED, UNC-3A AND UNF-3A (16 FEB 1969) [S/S BY NASM24694]
- PROCUREMENT SPEC: MIL-S-7839B, MILITARY SPECIFICATION, SCREW, STRUCTURAL, AIRCRAFT (21 DEC 1973) [S/S BY NASM7839]
