2a thread class right-hand 0.667" thread length hexagon extended washer head style 24 thread quantity per inch zinc screw surface treated unc thread series
2a thread class right-hand 1.196" thread length flat countersunk head style 40 thread quantity per inch passivate screw surface treated unc thread series
2a thread class right-hand 0.344" thread length flat countersunk head style 40 thread quantity per inch cadmium screw surface treated unc thread series
3a thread class right-hand 0.515" thread length flat countersunk head style 28 thread quantity per inch anodize screw surface treated unf thread series
3a thread class right-hand 0.726" thread length flat countersunk head style 32 thread quantity per inch passivate screw surface treated unjc thread series
2a thread class right-hand 3.648" thread length flat countersunk head style 56 thread quantity per inch passivate screw surface treated unc thread series