An assortment of stainless steel flat-head 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 1/4"-20 and 5/16"-18 coarse thread sizes. Full assortments of #44042 contain fourteen (14) refills comprised of Hillman item numbers #44043 - #44056.