Standard BOLT, MACHINE - DOUBLE HEXAGON EXTENDED WASHER HEAD, CLOSE TOLERANCE SHANK, AMS4967 (UNS R56400), 160 KSI, .4375-20 UNJF-3A 2019-12-03 CURRENT AS3151B
Standard BOLT, MACHINE - DOUBLE HEXAGON EXTENDED WASHER HEAD, CLOSE TOLERANCE SHANK, AMS4967 (UNS R56400), 160 KSI, .4375-20 UNJF-3A 2013-06-17 HISTORICAL AS3151A
Standard BOLT, MACHINE- DOUBLE HEXAGON EXTENDED WASHER HEAD, CLOSE TOLERANCE SHANK, AMS 4967, .4375-20 UNJF - 3A 2006-10-10 HISTORICAL AS3151