Used on 1240-01-149-8302. 3a thread class right-hand 0.158" thread length flat countersunk head style 24 thread quantity per inch passivate fastener surface treated unf thread series
2a thread class right-hand 0.636" thread length pan head style 24 thread quantity per inch passivate screw surface treated silicone rubber o-ring per mil-r-5847, ams 3377 unc thread series
3a thread class right-hand 0.232" thread length flat countersunk head style 40 thread quantity per inch passivate screw surface treated unjc thread series