3a thread class right-hand 0.360" thread length hexagon head style 6.258" grip length 20 thread quantity per inch top of head passivate surface treated unjf thread series
3a thread class right-hand 0.500" thread length hexagon head style 3.546" grip length 24 thread quantity per inch cadmium surface treated unf thread series
3a thread class right-hand 0.282" thread length dished hexagon head style 0.500" grip length 28 thread quantity per inch retaining element in shank cadmium surface treated unf thread series
3a thread class right-hand 0.313" thread length hexagon head style 0.046" hole diameter 1.240" grip length 32 thread quantity per inch unjf thread series
3a thread class right-hand 0.313" thread length hexagon head style 0.046" hole diameter 4.490" grip length 32 thread quantity per inch unf thread series
3a thread class right-hand 0.313" thread length hexagon head style 0.046" hole diameter 4.490" grip length 32 thread quantity per inch unf thread series
3a thread class right-hand 0.400" thread length hexagon head style 0.051" hole diameter 1.365" grip length 28 thread quantity per inch unjf thread series
3a thread class right-hand 0.400" thread length hexagon head style 0.046" hole diameter 3.240" grip length 28 thread quantity per inch unjf thread series
Used on aircraft, eagle f-15. 3a thread class right-hand 0.623" thread length double hexagon head style 2.802" grip length 20 thread quantity per inch unf thread series