MS9573B, MILITARY STANDARD: SCREW, MACHINE-DOUBLE HEXAGON EXTENDED WASHER HEAD, DRILLED, PD SHANK, SILVER PLATED, .164-36 UNJF-3A (30 SEP 1989) [SUPERSEDED BY SAE-AS9573].
MS9573B, MILITARY STANDARD: SCREW, MACHINE-DOUBLE HEXAGON EXTENDED WASHER HEAD, DRILLED, PD SHANK, SILVER PLATED, .164-36 UNJF-3A (30 SEP 1989) [SUPERSEDED BY SAE-AS9573].