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 feature a coarse 1/2"-13 thread size. Full assortments of #43304 contain eight (8) refills comprised of Hillman item numbers #43305 - #43312.