2a thread class right-hand 0.540" thread length pan head style 80 thread quantity per inch passivate screw surface treated chamfered end .010 x .010, altered item NAS1635-00-10 unf thread series
3a thread class right-hand 0.500" thread length pan no. 2 head style 0.042" hole diameter 32 thread quantity per inch passivate screw surface treated unjf thread series
3a thread class right-hand 0.718" thread length flat countersunk head style 20 thread quantity per inch cadmium screw surface treated unjf thread series
