3a thread class right-hand 1.755" grip length 28 thread quantity per inch 125000 single pounds per square inch shear strength cadmium surface treated unjf thread series
flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style 0.219" grip length 3450 single pounds per square inch shear strength cadmium sleeve surface treated
3a thread class right-hand flush countersunk head style 1.693" grip length 32 thread quantity per inch 108000 single pounds per square inch shear strength unjf thread series