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.