2a thread class right-hand 0.533" thread length pan head style 32 thread quantity per inch furnished with boot type nylon washer 0.375 in. o. d. head unc thread series
2a thread class right-hand 0.408" thread length pan head style 32 thread quantity per inch furnished with boot type nylon washer 0.438 in. o. d. head unc thread series
2a thread class right-hand 0.346" thread length pan head style 32 thread quantity per inch furnished with boot type nylon washer 0.500 in. o. d. head unf thread series
2a thread class right-hand 0.658" thread length pan head style 32 thread quantity per inch furnished with boot type nylon washer 0.500 in. o. d. head unf thread series
2a thread class right-hand 0.230" thread length pan head style 32 thread quantity per inch furnished with boot type nylon washer 0.438 in. o. d. head unc thread series
2a thread class right-hand 0.283" thread length pan head style 32 thread quantity per inch furnished with boot type nylon washer 0.500 in. o d. head unf thread series
2a thread class right-hand 0.346" thread length pan head style 32 thread quantity per inch furnished with boot type nylon washer 0.375 in. o. d. head unc thread series
3a thread class right-hand 0.688" thread length hexagon head style 32 thread quantity per inch passivate screw surface treated keyway unf thread series
3a thread class right-hand 0.258" thread length pan head style 56 thread quantity per inch passivate screw surface treated end of shank cut to 45 degree angle equal to one complete thread. unc thread series
Used on b-1b bomber. 3a thread class right-hand 0.425" thread length fillister countersunk head style 28 thread quantity per inch passivate screw surface treated unjf thread series