3a thread class right-hand 1.708" thread length hexagon extended washer head style 12 thread quantity per inch cadmium surface treated unf thread series
2a thread class right-hand 0.194" thread length flat chamfer head style 40 thread quantity per inch 0.015 in. chamfered head nickel surface treated unf thread series
3a thread class right-hand 0.251" thread length flat countersunk head style 0.302" grip length 32 thread quantity per inch passivate surface treated unc thread series
3a thread class right-hand 0.500" thread length flat countersunk head style 2.625" grip length 28 thread quantity per inch cadmium surface treated unf thread series
2a thread class right-hand 0.438" thread length bevel-conical head style 32 thread quantity per inch oxide or cadmium surface treated unc thread series
2a thread class right-hand 4.000" thread length square head style 11 thread quantity per inch furnished w/1 square nut zinc surface treated unc thread series