An assortment of stainless steel metric flat-head socket cap screws from Hillman. 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 included in this assortment range from M3-0.50 thru M6-1.00 in coarse thread size. Full assortments of #44551 contain fifteen (15) refills comprised of Hillman item numbers #44505, #44507 - #44509, #44513 - #44516, #44523 - #44525, #44527, and #44529 - #44531.