2a thread class right-hand 0.500" thread length hexagon head style 40 thread quantity per inch surface nitride treatment per MFR66503/sp-267 unc thread series
3a thread class right-hand 0.619" thread length hexagon head style 20 thread quantity per inch navy special project anodize surface treated unf thread series
2a thread class right-hand 0.358" thread length flat chamfer head style 64 thread quantity per inch thd relief 0.031 in. wide 0.072 in. dia unf thread series
2a thread class right-hand 0.420" thread length headless (setscrew) head style 32 thread quantity per inch passivate fastener surface treated unf thread series
3a thread class right-hand 0.170" thread length flat chamfer head style 32 thread quantity per inch unthreaded shank undercutto 0.115 in. min, 0.125 in. max dia cadmium surface treated unc thread series
3a thread class right-hand 0.093" thread length headless (setscrew) head style 40 thread quantity per inch navy special project passivate surface treated unc thread series
3a thread class right-hand 0.365" thread length headless (setscrew) head style 16 thread quantity per inch cadmium or zinc surface treated unc thread series