An assortment of 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 #944038 contain sixteen (16) refills comprised of Hillman item numbers #940644 - #940648, #940656 - #940662, #940669, and #940671 - #940673.