An assortment of chrome-plated, flat-head, socket cap screws from Hillman. 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 included in this assortment come in 5/16"-18 and 3/8"-16 coarse thread sizes. Full assortments of #944230 contain eleven (11) refills comprised of Hillman item numbers #940441 - #940451.