3a thread class right-hand 0.562" thread length hexagon head style 0.062" hole diameter 20 thread quantity per inch dichromate zinc surface treated unc thread series
2a thread class right-hand 0.510" thread length double hexagon extended washer head style 1.335" grip length 24 thread quantity per inch unf thread series
3a thread class right-hand 0.150" thread length hexagon head style 12 thread quantity per inch tapped hole drilled thru top of head thread size 1/4-28 unf-2b cadmium surface treated un thread series
3a thread class right-hand 0.444" thread length hexagon head style 0.115" grip length 28 thread quantity per inch passivate surface treated unf thread series
2a thread class right-hand 0.750" thread length hexagon head style 0.094" grip length 24 thread quantity per inch cadmium surface treated unf thread series
3a thread class right-hand 0.630" thread length hexagon head style 0.047" hole diameter 0.072" grip length 32 thread quantity per inch unjf thread series
3a thread class right-hand 0.620" thread length double hexagon extended washer head style 0.122" grip length 32 thread quantity per inch unjf thread series
3a thread class right-hand 0.875" thread length hexagon head style 24 thread quantity per inch 0.125 in. lg by 0.314 in.min 0.319 in. max dia undercut directly under bearing surface of head unf thread series
