AS3159A -- BOLT, MACHINE-DOUBLE HEXAGON EXTENDED WASHER HD, DRILLED, CLOSE TOLERANCE SHANK, TI ALLOY, UNS R56400, 160 KSI MIN .3750-24, UNJF-3A
SAE InternationalBOLT, MACHINE-DOUBLE HEXAGON EXTENDED WASHER HD, DRILLED, CLOSE TOLERANCE SHANK, TI ALLOY, UNS R56400, 160 KSI MIN .3750-24, UNJF-3AAS3159A