3a thread class right-hand 0.345" thread length dished hexagon head style 3.115" grip length 28 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.400" thread length flat countersunk head style 1.302" grip length 28 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.306" thread length crowned hexagon head style 1.375" grip length 24 thread quantity per inch retaining element in shank passivate surface treated unjf thread series
2a thread class right-hand 0.470" thread length pan head style 32 thread quantity per inch passivate screw surface treated furnished with boot type nylon washer 0.500 in. o.d, head unf thread series