2a thread class right-hand 0.469" thread length hexagon head style 0.062" hole diameter 20 thread quantity per inch cadmium surface treated unc thread series
3a thread class right-hand 0.252" thread length pan no. 2 head style 32 thread quantity per inch cadmium screw surface treated internal drive ribbed unjc thread series
3a thread class right-hand 0.2925" thread length flat countersunk head style 32 thread quantity per inch cadmium screw surface treated unjf thread series