An assortment of stainless steel hex nut & nylon insert lock nuts from The Hillman Group. Hex nuts are often used in deck and fence building. They are great for most general applications. Nylon insert lock nuts are used for fastening to a bolt when mechanically joining materials together. The nylon insert prevents loosening of parts due to vibration. Variants included in this assortment range from 5/8"-11 to 1"-8 in coarse thread size. Full assortments of #43743 contain eight (8) refills comprised of Hillman item numbers #43744 - #43751.