MS24626D, MILITARY STANDARD: SCREW, TAPPING-THREAD CUTTING, TYPE BF OR BT, PAN HEAD, CROSS-RECESSED, CORROSION-RESISTING STEEL (15 MAY 1975)
MS24626D, MILITARY STANDARD: SCREW, TAPPING-THREAD CUTTING, TYPE BF OR BT, PAN HEAD, CROSS-RECESSED, CORROSION-RESISTING STEEL (15 MAY 1975).