An assortment of plain steel socket set screw variants from The Hillman Group. Socket set screws are fully-threaded headless screws with a recessed hex drive. The screw passes through a threaded hole in the outer object and is tightened against the inner object to prevent it from moving relative to the outer object. Included variants measure 5/8"-11 and 3/4"-10 in USS coarse screw thread size and run 1/2" thru 2" in length. Full assortments of #4686 contain ten (10) refills comprised of Hillman item numbers #4687 - #4696.