2a thread class right-hand 0.182" thread length flat countersunk undercut head style 32 thread quantity per inch oxide screw surface treated unc thread series
2a thread class right-hand 0.250" thread length flat chamfer head style 40 thread quantity per inch chromate zinc screw surface treated unf thread series
3a thread class right-hand 0.312" thread length flat chamfer head style 36 thread quantity per inch chromate zinc screw surface treated unf thread series
2a thread class right-hand 0.720" thread length crowned hexagon head style 28 thread quantity per inch passivate screw surface treated unf thread series
2a thread class right-hand 0.213" thread length fillister head style 32 thread quantity per inch passivate screw surface treated undercut 1/32 in. w to root dia of thread 0.225 in. - 0.015 from bearing surface of head unc thread series
2a thread class right-hand 0.333" thread length flat countersunk head style 28 thread quantity per inch phosphate screw surface treated unf thread series
3a thread class right-hand 0.500" thread length hexagon head style 0.070" hole diameter 32 thread quantity per inch cadmium or zinc screw surface treated unf thread series
3a thread class right-hand 0.469" thread length flat countersunk head style 28 thread quantity per inch cadmium screw surface treated unf thread series
3a thread class right-hand 0.641" thread length flat countersunk head style 24 thread quantity per inch cadmium screw surface treated unf thread series
