12 pack, solid brass lock nut, assorted, holds connecting parts together on a nipple or pipe in a lamp or lighting fixture, includes 2 each of the following: 1/4-27 round knurled lock nuts, 1/8 ip round knurled lock nuts, 1/4 ip round knurled lock nuts & 8-32 battery nuts & 4 each 1/8 ip hex nuts.