2a thread class right-hand 0.276" thread length flat countersunk head style 56 thread quantity per inch cadmium screw surface treated unc thread series
2a thread class right-hand 0.281" thread length flat chamfer head style 32 thread quantity per inch head vertically knurled passivate fastener surface treated unc thread series
3a thread class right-hand 0.730" thread length hexagon head style 12 thread quantity per inch cadmium surface treated concentric hole unthreaded unf thread series
3a thread class right-hand flush countersunk head style 2.552" grip length 20 thread quantity per inch 108000 single pounds per square inch shear strength cadmium surface treated unjf thread series
3a thread class right-hand 0.406" thread length flat countersunk head style 32 thread quantity per inch cadmium screw surface treated unjf thread series
