2a thread class right-hand 0.512" thread length flat countersunk head style 40 thread quantity per inch passivate screw surface treated unc thread series
2a thread class right-hand 0.200" thread length flat countersunk head style 40 thread quantity per inch passivate screw surface treated unc thread series
2a thread class right-hand 0.313" thread length flat countersunk head style 32 thread quantity per inch passivate screw surface treated unc thread series
3a thread class right-hand 0.750" thread length flat chamfer head style 13 thread quantity per inch head may be knurled passivate surface treated unc thread series
Used on F-15-S. 3a thread class right-hand 0.400" thread length double hexagon head style 24 thread quantity per inch passivate surface treated unjf thread series
2a nut thread a thread class right-hand nut thread a 0.750" nut thread a thread length 13.750" overall length 13 nut thread a thread quantity per inch zinc surface treated unc nut thread a thread series
3a thread class right-hand 1.596" thread length flat countersunk head style 13 thread quantity per inch zinc fastener surface treated unc thread series