2a thread class right-hand 0.500" thread length flat chamfer head style 32 thread quantity per inch navy special project passivate screw surface treated unc thread series
2a thread class right-hand 0.282" thread length flat countersunk head style 32 thread quantity per inch cadmium screw surface treated unc thread series
2a thread class right-hand 0.270" thread length flat chamfer head style 28 thread quantity per inch 0.130 in. min 0.135 in. max distance from ctr 0f head to ctr line of shank oxide surface treated unf thread series
3a thread class right-hand 0.167" thread length headless (setscrew) head style 56 thread quantity per inch 0.039 in. min 0.047 in. max dia of flat point cadmium surface treated unc thread series