3-way Cap, Shell, and Insulator, WSS for UNO fitterLeviton Brand, Complete Socket for 3-Way Bulbs, w/Uno Thread
3-way Threaded Socket w/Set Screw: Includes Cap, Shell, and Insulator 1/4 IP Brite Gilt Uno Thread Shell, Cap, & 13/16" mandrel, Turn-knob Leviton Socket for 3-Way Bulbs