An assortment of flat-head socket cap screws from Hillman. Socket 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 come in 7/16"-14 & 1/2"-13 coarse thread sizes. Full assortments of #43615 contain ten (10) refills comprised of Hillman item numbers #43616 - #43625.