3a thread class right-hand 0.575" thread length flat chamfer head style 0.036" hole diameter 40 thread quantity per inch passivate surface treated unc thread series
2a thread class right-hand 1.750" thread length flat countersunk head style 32 thread quantity per inch cadmium screw surface treated unc thread series
3a thread class right-hand 0.351" thread length double hexagon head style 1.615" grip length 24 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.341" thread length double hexagon head style 1.365" grip length 24 thread quantity per inch cadmium surface treated unf thread series
2a thread class right-hand 0.730" thread length fillister head style 0.326" hole diameter 24 thread quantity per inch navy special project passivate screw surface treated unf thread series
3a thread class right-hand 0.890" thread length flat chamfer head style 16 thread quantity per inch navy special project chromium grip surface treated counterbore unthreaded unjf thread series
Used on engine,gasoline model 1a08-2. 2a thread class right-hand 0.375" thread length hexagon head style 32 thread quantity per inch cadmium or zinc surface treated unc thread series
right-hand 1.150" thread length hexagon head style 20 thread quantity per inch head slotted in castle patten point to point oxide surface treated unc thread series