AN500 and AN501
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- PROCUREMENT SPECIFICATION: FF-S-92B, FEDERAL SPECIFICATION, SCREW, MACHINE, SLOTTED, CROSS RECESSED OR HEXAGON HEAD (27 AUG 1974)
- AN500, MILITARY STANDARD SCREW, MACHINE, FILLISTER HEAD, COARSE THREAD (24 MAY 1967)
- AN501, MILITARY STANDARD SCREW, MACHINE, FILLISTER HEAD, FINE THREAD (12 NOV 1980) (S/S BY NASM501)
