2a thread class right-hand 0.875" thread length flat countersunk head style 20 thread quantity per inch locking element i/a/w mil-f-18240 unc thread series
Used on F-15S. 3a thread class right-hand 0.437" thread length flat chamfer head style 40 thread quantity per inch passivate screw surface treated unc thread series
Used on f-15s acft. 2a thread class right-hand flat countersunk head style 32 thread quantity per inch passivate screw surface treated unc thread series
3a thread class right-hand 0.966" thread length undercut hexagon head style 40 thread quantity per inch passivate screw surface treated uns thread series
2a thread class right-hand 0.825" thread length flat countersunk head style 32 thread quantity per inch passivate screw surface treated unc thread series
2a thread class right-hand 1.325" thread length fillister head style 0.037" hole diameter 40 thread quantity per inch cadmium screw surface treated unc thread series
Used on f-15s acft. 2a thread class right-hand 0.188" thread length flat countersunk head style 32 thread quantity per inch passivate screw surface treated coated black oxide unc thread series
Used on F15S. 3a thread class right-hand 0.952" thread length hexagon head style 24 thread quantity per inch passivate screw surface treated unjf thread series