3a thread class right-hand 0.735" thread length flat countersunk head style 5.615" grip length 20 thread quantity per inch cadmium or cadmium surface treated unjf thread series
3a thread class right-hand 0.372" thread length fillister countersunk head style 28 thread quantity per inch socket drive recess in thread end 0.095 in. min 0.097 in. max width across flats passivate surface treated unjf thread series
3a thread class right-hand 0.372" thread length fillister countersunk head style 28 thread quantity per inch socket drive recess in thread end 0.095 in. min 0.097 in. max width across flats passivate surface treated unjf thread series
3a thread class right-hand 0.266" thread length double hexagon head style 0.178" grip length 28 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.490" thread length double hexagon head style 4.052" grip length 20 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.400" thread length hexagon head style 0.865" grip length 28 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.188" thread length flat chamfer head style 40 thread quantity per inch cadmium fastener surface treated unrc thread series
2a thread class right-hand 0.250" thread length fillister head style 56 thread quantity per inch oxide screw surface treated head has a slot 0.31 in.w; 0.030 in deep unc thread series
3a thread class right-hand 1.427" grip length 20 thread quantity per inch 108000 single pounds per square inch shear strength cadmium surface treated unjf thread series
universal head style 0.020" grip length ns" letters after the material code "b" indicate no preference to lock type (may be visible or internal) . rivets with no letter code (indicating visible lock type) anodize sleeve or chromate sleeve surface treated
