An assortment of socket-head cap screws from Hillman. Socket-head cap screws carry a recessed internal socket drive to add strength. They are commonly used on machine parts, manufacturing equipment, and other mechanical applications. Variants in this assortment feature a coarse 3/4"-10 thread size. Full assortments of #4704 contain six (6) refills comprised of Hillman item numbers #4705 - #4710.