3a thread class right-hand 0.503" thread length dished hexagon head style 2.990" grip length 20 thread quantity per inch cadmium surface treated unjf thread series
2a thread class right-hand 0.300" thread length hexagon head style 16 thread quantity per inch item has non standard dog point 0.297 in. dia.x 0.320 in.lg cadmium surface treated unc thread series
3a thread class right-hand 0.338" thread length pan no. 2 head style 1.052" grip length 32 thread quantity per inch cadmium surface treated unjf thread series
2a thread class right-hand 0.400" thread length hexagon extended washer head style 20 thread quantity per inch phosphate surface treated unc thread series
3a thread class right-hand 1.022" thread length flat countersunk head style 28 thread quantity per inch cadmium screw surface treated unjf thread series