An assortment of stainless steel socket-head cap screws from Hillman. Socket-head 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 #6-32, #8-32, and #10-32 fine & coarse thread sizes. Full assortments of #43077 contain sixteen (16) refills comprised of Hillman item numbers #43078 - #43093.