An assortment of Hillman mini socket-head cap screws made from heat-treated steel alloy. 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 range from #0-80 to #4-40 in coarse and fine screw thread sizes. Full assortments of #43481 contain sixteen (16) refills comprised of Hillman item numbers #43482 - #43497.