Used on tank,full tracked,xm1;tank,full tracked,m1w/improved armor;tank,full tracked,m1a1. 2a thread class right-hand 0.790" thread length hexagon head style 16 thread quantity per inch unc thread series
2a thread class right-hand 0.143" thread length flat countersunk head style 56 thread quantity per inch cadmium screw surface treated unc thread series
3a thread class right-hand 0.252" thread length pan head style 32 thread quantity per inch navy special project cadmium screw surface treated unjc thread series
3a thread class right-hand 0.252" thread length pan head style 32 thread quantity per inch navy special project cadmium screw surface treated unjc thread series
3a thread class right-hand 0.400" thread length pan head style 28 thread quantity per inch navy special project cadmium screw surface treated unf thread series
3a thread class right-hand 0.921" thread length flat countersunk head style 32 thread quantity per inch cadmium screw surface treated unjf thread series
3a thread class right-hand 0.162" thread length flat countersunk head style 32 thread quantity per inch cadmium screw surface treated unjc thread series
3a thread class right-hand 1.718" thread length flat countersunk head style 40 thread quantity per inch navy special project cadmium screw surface treated unjc thread series
3a thread class right-hand 0.371" thread length flat countersunk head style 32 thread quantity per inch passivate screw surface treated unf thread series
3a thread class right-hand 0.386" thread length flat countersunk head style 32 thread quantity per inch navy special project cadmium screw surface treated unf thread series
3a thread class right-hand 0.371" thread length flat countersunk head style 32 thread quantity per inch cadmium screw surface treated unf thread series
2a thread class right-hand 0.085" thread length flat countersunk undercut head style 64 thread quantity per inch nickel screw surface treated unf thread series