An assortment of button-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 #10-32 and 1/4"-28 fine thread sizes. Full assortments of #45069 contain twelve (12) refills comprised of Hillman item numbers #3881, #3882, #43555 - #43557, and #45070 - #45076.