3a thread class right-hand 0.510" thread length flat countersunk head style 32 thread quantity per inch cadmium screw surface treated unf thread series
2a thread class right-hand 0.284" thread length flat chamfer head style 13 thread quantity per inch passivate screw surface treated groove in head 0.120 in. w; 0.190 in. deep unc thread series
3a thread class right-hand 0.282" thread length flat chamfer head style 0.034" hole diameter 32 thread quantity per inch navy special project cadmium screw surface treated unjf thread series
3a thread class right-hand 0.475" thread length flat countersunk head style 32 thread quantity per inch cadmium screw surface treated unjc thread series
3a thread class right-hand 0.282" thread length pan head style 32 thread quantity per inch navy special project cadmium screw surface treated unjf thread series
2a thread class right-hand 0.325" thread length watertight head style 40 thread quantity per inch passivate screw surface treated o ring fluorosilicone rubber, color blue unc thread series