flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style 0.501" grip length 710 single pounds per square inch shear strength cadmium sleeve surface treated
3a thread class right-hand 0.385" thread length flat countersunk head style 0.552" grip length 28 thread quantity per inch cadmium surface treated unf thread series
3b thread class right-hand 0.775" thread length 18 thread quantity per inch has internal thread lock feature passivate surface treated keylock unjf thread series
3a thread class right-hand 0.500" thread length flat chamfer head style 0.046" hole diameter 32 thread quantity per inch passivate surface treated unc thread series