2a thread class right-hand 1.280" thread length hexagon head style 0.126" hole diameter 12 thread quantity per inch cadmium surface treated un thread series
3a thread class right-hand 0.921" thread length hexagon head style 5.422" grip length 18 thread quantity per inch passivate surface treated unf thread series
3a thread class right-hand 0.499" thread length hexagon head style 3.922" grip length 24 thread quantity per inch passivate surface treated unf thread series
3a thread class right-hand 0.390" thread length hexagon head style 5.297" grip length 24 thread quantity per inch anodize or chromate surface treated unf thread series
3a thread class right-hand 0.625" thread length hexagon head style 2.296" grip length 20 thread quantity per inch passivate surface treated unf thread series
2a thread class right-hand 0.470" thread length hexagon head style 20 thread quantity per inch spherical radius 0.310 in. on hex head; 0.500 in. dia passivate surface treated unc thread series
