An assortment of lamp nipple and lock nut variants from The Hillman Group. Lamp nipples are pipe fittings that are used to connect two other fittings, which is a common assembly in most lighting components. Lock nuts are great for keeping components on a threaded bolt or rod locked into place. Lamp nipple variants included in this assortment range from 1/2" to 2" in length and feature a 1/8 IPS thread type. Included lock nut variants range from 3/8" to 3/4" in diameter. Full assortments of #54187 contain ten (10) refills comprised of Hillman item numbers #54036, #54039 - #54044, #401354, #404538, and #404553.