Used on F-18. right-hand 0.395" thread length spade head style 32 thread quantity per inch screw, retaining, cutoff valve seat passivate screw surface treated unjf thread series
3a thread class right-hand 0.719" thread length flat countersunk head style 32 thread quantity per inch passivate screw surface treated unjc thread series
Used on F-18. 3a thread class right-hand 0.334" thread length fillister head style 0.055" hole diameter 24 thread quantity per inch cadmium screw surface treated unc thread series
