USS & SAE All-Metal Top Lock Nuts Assortment (1/4" thru 3/4" Dia.)Hillman Item #3343
An assortment of all-metal top lock nut variants from The Hillman Group. Lock nuts provide excellent resistance to loosening in high vibration applications. The full assortment includes USS coarse and SAE fine screw thread variants ranging 1/4" to 3/4" in diameter. Full assortment contains fourteen (14) refills comprised of Hillman item numbers #3344 - #3357.