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 #10-24 & #10-32 coarse and fine thread sizes. Full assortments of #43163 contain fourteen (14) refills comprised of Hillman item numbers #3246 - #3251, #43089 - #43091, #43093, and #43164 - #43167.