3a thread class right-hand 0.339" thread length flat countersunk head style 32 thread quantity per inch cadmium screw surface treated unjc thread series
2a thread class right-hand 1.326" thread length flat countersunk head style 48 thread quantity per inch cadmium screw surface treated unf thread series
2a thread class right-hand 0.250" thread length flat countersunk head style 32 thread quantity per inch 0.188 in. min, 0.187 in. max panel grip thk anodize stand-off surface treated unc thread series