MS51960C, MILITARY SPECIFICATION: SHEET SCREW, MACHINE-FLAT COUNTERSUNK HEAD, 82 DEGREE, CROSS-RECESSED, CORROSION RESISTANT STEEL, UNF-2A (29 MAR 1991)
MS51960C, MILITARY SPECIFICATION: SHEET SCREW, MACHINE-FLAT COUNTERSUNK HEAD, 82 DEGREE, CROSS-RECESSED, CORROSION RESISTANT STEEL, UNF-2A (29 MAR 1991).