2a thread class right-hand 0.813" thread length flat countersunk head style 32 thread quantity per inch passivate screw surface treated extension on threaded end 0.100 in. lth, 0.090 in. dia; concentric hole in extension 0.070 in. dia unc thread series
2a thread class right-hand 0.123" thread length flat countersunk undercut head style 40 thread quantity per inch oxide screw surface treated unc thread series
2a thread class right-hand 1.075" thread length pan head style 40 thread quantity per inch navy special project cadmium screw surface treated unc thread series
3a thread class right-hand 2.631" thread length flat countersunk head style 32 thread quantity per inch cadmium screw surface treated unjc thread series