3a thread class right-hand 0.750" thread length flat chamfer head style 0.033" hole diameter 32 thread quantity per inch cadmium surface treated unrc thread series
2a thread class right-hand 0.847" thread length flat countersunk head style 20 thread quantity per inch cadmium screw surface treated unc thread series
2a thread class right-hand 0.235" thread length modified pan head style 32 thread quantity per inch navy special project anodize stand-off surface treated unf thread series