3a thread class right-hand 0.438" thread length flat countersunk head style 56 thread quantity per inch cadmium screw surface treated unjc thread series
3a thread class right-hand 0.594" thread length spline drive shear head head style 1.990" grip length 18 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.338" thread length pan head style 0.115" grip length 32 thread quantity per inch cadmium surface treated unjc thread series