3a thread class right-hand 0.425" thread length hexagon head style 0.938" grip length 28 thread quantity per inch chromium grip surface treated unjf thread series
flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style 450 double pounds per square inch shear strength anodize surface treated
3a thread class right-hand 0.323" thread length flat countersunk head style 0.438" grip length 32 thread quantity per inch aluminum surface treated unjc thread series
3a thread class right-hand 0.323" thread length flat countersunk head style 0.500" grip length 32 thread quantity per inch cadmium surface treated unjc thread series
3a thread class right-hand 0.276" thread length flat countersunk head style 3.276" grip length 32 thread quantity per inch cadmium surface treated unjc thread series