An assortment of stainless steel coupling nuts from The Hillman Group. Coupling nuts are long nuts used to connect pieces of threaded rod or other male-threaded fasteners. Think of them as longer hex nuts. Variants included in this assortment range from #10-32 to 3/4"-16 in fine thread size. Full assortments of #33819 contain eight (8) refills comprised of Hillman item numbers #33820 - #33827.