3a thread class right-hand flush countersunk head style 1.067" grip length 32 thread quantity per inch 95000 single pounds per square inch shear strength color bronze, must be used with wet sealant or with lubricated collars cadmium surface treated unjf thread series
3a thread class right-hand 0.795" thread length hexagon head style 40 thread quantity per inch navy special project cadmium screw surface treated unjc thread series