An assortment of class 10.9 metric flat-head socket 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 range from M3-0.50 thru M6-1.00 in coarse thread size. Full assortments of #43948 contain fifteen (15) refills comprised of Hillman item numbers #43901, #43903, #43904, #43906, #43910 - #43913, #43920 - #43922, #43924, and #43926 - #43928.