Used on 2hp centrifugal pump nsn 4320-01-506-2047. right-hand hexagon head style 16 thread quantity per inch hex head cap screw 3/8-16X3/4 for centrifugal pump 4XZ216 stainless steel; 3/8-16X3/4 hex head cap screw; repair part for 2hp centrifugal pump 4XZ216 nsn 4320-01-506-2047