2a thread class right-hand 0.067" thread length flat countersunk head style 64 thread quantity per inch passivate screw surface treated unc thread series
3a thread class right-hand 0.438" thread length dished hexagon head style 1.302" grip length 24 thread quantity per inch aluminum surface treated unjf thread series
3a thread class right-hand 1.250" thread length double hexagon w/hole head style 24 thread quantity per inch cadmium fastener surface treated unf thread series