3b thread class right-hand 0.693" thread length 14 thread quantity per inch internal threads unjf-3b, 0.500-20, 0.693 in lg passivate surface treated serrated unjf thread series
Used on c-5 aircraft. 3a thread class right-hand 0.665" thread length double hexagon extended washer head style 0.990" grip length 20 thread quantity per inch unjf thread series
3a thread class right-hand 0.750" thread length hexagon head style 0.752" grip length 32 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.276" thread length hexagon head style 0.079" grip length 32 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.690" thread length hexagon head style 1.810" grip length 32 thread quantity per inch cadmium surface treated unjf thread series
2a thread class right-hand 1.250" thread length fillister head style 0.046" hole diameter 40 thread quantity per inch passivate screw surface treated unf thread series
2a thread class right-hand 1.250" thread length fillister head style 0.046" hole diameter 40 thread quantity per inch passivate screw surface treated unf thread series