An assortment of stainless steel metric button-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 M3-0.50 and M4-0.70 coarse thread sizes. Full assortments of #44453 contain sixteen (16) refills comprised of Hillman item numbers #44454 - #44469.