3a thread class right-hand 0.500" thread length hexagon head style 3.625" grip length 18 thread quantity per inch cadmium surface treated unf thread series
3a thread class right-hand 0.641" thread length hexagon head style 0.070" hole diameter 0.562" grip length 24 thread quantity per inch unf thread series
2a thread class right-hand 2.000" thread length hexagon head style 1.750" grip length 18 thread quantity per inch passivate surface treated unc thread series
2a thread class right-hand 0.298" thread length hexagon head style 32 thread quantity per inch shank undercut below shoulder 0.097 in. dia by 0.040 in. w passivate surface treated unc thread series