Hollow Threaded Tube Fixing Screw Lamp Cap | Fruugo UK
1x M10 300mm x 10mm Allthread Hollow Threaded Rod Tube, Electrical Lamp Socket | eBay
36 and 48 Inch Seamless All Thread Pipe For Lamps and Fixtures, Comes in Steel or Brass, 1/8 IP, 1/4 IP or 3/8 IP (22380) - Antique Lamp Supply - Quality Lamp Parts Since 1952