3a thread class right-hand 0.220" thread length fillister head style 40 thread quantity per inch shoulder surface has 63 microinches rms passivate surface treated unc thread series
2a thread class right-hand 0.250" thread length flat countersunk head style 32 thread quantity per inch third shoulder dia 0.312 in. lg 0.045 in. cadmium surface treated unf thread series
2a thread class right-hand 0.250" thread length flat chamfer head style 0.037" hole diameter 40 thread quantity per inch passivate surface treated unc thread series
3a thread class right-hand 0.680" thread length flat chamfer head style 0.070" hole diameter 20 thread quantity per inch passivate surface treated unc thread series
3a thread class right-hand 0.327" thread length flat chamfer head style 20 thread quantity per inch roove 0.083 in. lg 0.369 in. dia. phosphate surface treated unf thread series
2a thread class right-hand 0.297" thread length flat chamfer head style 28 thread quantity per inch navy special project passivate surface treated unf thread series