8 pc. Steampunk Industrial Lampholder Black Iron Pipe Lamp Socket . 3/4" NPT | eBay
Antique Brass Turn Knob Early Electric Industrial Style Lamp Sockets, No UNO - Choice of Interior (48273A) - Antique Lamp Supply - Quality Lamp Parts Since 1952
Leviton Weatherproof Socket, Black R60-00055-000 - The Home Depot