2a thread class right-hand 0.312" thread length flat chamfer head style 0.031" hole diameter 32 thread quantity per inch cadmium surface treated unc thread series
3a thread class right-hand 0.410" thread length flat chamfer head style 0.062" hole diameter 28 thread quantity per inch phosphate surface treated unf thread series
2a thread class right-hand 0.312" thread length pan no. 2 head style 32 thread quantity per inch cadmium or chromium screw surface treated unc thread series
3a thread class right-hand 0.531" thread length hexagon head style 0.438" grip length 24 thread quantity per inch passivate surface treated unf thread series
3a thread class right-hand 1.063" thread length hexagon head style 1.422" grip length 16 thread quantity per inch cadmium surface treated unf thread series