2a thread class right-hand 0.250" thread length oval head style 56 thread quantity per inch self-sealing rubber o-ring under the head unc thread series
2a thread class right-hand 0.212" thread length pan head style 40 thread quantity per inch screw, machine-captive passivate screw surface treated overal material is 300 series cres. may be made from MS51957-14 screw. unc thread series
2a thread class right-hand 0.250" thread length button head style 32 thread quantity per inch oxide screw surface treated 0.093 wide hex socket drive on threaded end. unf thread series
Used on e fwd fuselage. 3a thread class right-hand 0.802" thread length flat countersunk head style 40 thread quantity per inch screw, machine passivate screw surface treated unc thread series
Used on c-17a acft. 3a thread class right-hand 0.588" thread length hexagon head style 32 thread quantity per inch screw, machine passivate screw surface treated keyway, opposing 2x, 0.049 in wd, 0.043 in dp, 0.670 in lg unf thread series
2a thread class right-hand 0.563" thread length flat countersunk head style 32 thread quantity per inch screw, machine, flat countersunk head, 100 degress, cross recessed, unc-2a oxide screw surface treated the surface is coated with black oxide unc thread series
2a thread class right-hand 0.875" thread length flat countersunk head style 24 thread quantity per inch passivate screw surface treated unc thread series
