Medium Base, 3-Way Turn-Knob, Phenolic Socket, with Threaded Shell and Ring (47685)

Features: 3-way, turn-knob, phenolic socket Designed for 3-way style bulbs The shell comes threaded and includes a shade ring Medium base (E26), sometimes referred to as standard or Edison base The bottom cap it tapped 1/8 IP, which measures 3/8" diameter The bottom cap also comes with a set screw for a more secure fit Rated 250 watts - 250 volts U.L. and CSA Listed Turn-Knob 3-Way Phenolic Socket, Med. Base (E26), 1/8IP cap, has threaded shell with ring, 250W- 250V, 4-piece set, with screw terminals.