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 coarse thread sizes. Full assortments of #43156 contain sixteen (16) refills comprised of Hillman item numbers #43078 - #43088 and #43157 - #43161.