3a thread class right-hand 0.662" thread length bevel-conical head style 24 thread quantity per inch cadmium fastener surface treated unf thread series
2a thread class right-hand 0.191" thread length hexagon head style 32 thread quantity per inch cres uns S21800 passivate surface treated unc thread series
3a thread class right-hand 1.125" thread length flat chamfer head style 16 thread quantity per inch head may be knurled at the manufacturer's option zinc surface treated unc thread series
3a thread class right-hand 0.438" thread length dished hexagon head style 1.625" grip length 24 thread quantity per inch drilled head cadmium surface treated unjf thread series
2a thread class right-hand 0.540" thread length pan head style 80 thread quantity per inch passivate screw surface treated chamfered end .010 x .010, altered item NAS1635-00-10 unf thread series