3a thread class right-hand countersunk w/reverse chamfer head style 0.505" grip length 28 thread quantity per inch 95000 single pounds per square inch shear strength unjf thread series
3a thread class right-hand flush countersunk head style 0.443" grip length 32 thread quantity per inch 95000 single pounds per square inch shear strength cadmium surface treated unjf thread series
3a thread class right-hand 0.400" thread length flat countersunk head style 2.365" grip length 28 thread quantity per inch aluminum surface treated unjf thread series