1/4-27 UNF Female Threaded - 9/16in Diameter x 1/16in H - Knurled Brass Round Lock Nut - Unfinished Brass This knurled brass round lock nut features a 1/4-27 UNF female thread for use with compatible 1/4-27 UNF male threaded components. The knurled exterior provides a textured gripping surface for c... See More