An assortment of black chrome-plated, smooth-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 range from 1/4"-20 thru 3/8"-16 in coarse thread size. Full assortments of #944313 contain sixteen (16) refills comprised of Hillman item numbers #942644 - #942649, #942657 - #942662, #942669, and #942671 - #942673.