2a thread class right-hand 0.375" thread length knurled no. 4 head style 32 thread quantity per inch head straight knurled passivate surface treated unc thread series
2a thread class right-hand 0.250" thread length flat countersunk head style 40 thread quantity per inch chromate screw surface treated unc thread series
2a thread class right-hand 0.500" thread length hexagon head style 16 thread quantity per inch undercut 0.093 in. wide 0.593 in. from bearing surface of head cadmium surface treated unc thread series
3a thread class right-hand 0.400" thread length flat countersunk head style 28 thread quantity per inch cadmium screw surface treated unf thread series
2a thread class right-hand 0.370" thread length fillister head style 0.037" hole diameter 40 thread quantity per inch passivate screw surface treated unc thread series
3a thread class right-hand 0.750" thread length flat chamfer head style 0.047" hole diameter 13 thread quantity per inch zinc surface treated unc thread series