Larger back plate for attaching bulb holder to wooden table lamp.
80mm Chrome Back Plate / Ceiling Plate with 12mm Hole
Safety Switch Lamp Holder Half Inch With Back Plate Cover and Screws - Brushed Antique
ElekTek Brass Back Plate Kit - 10mm Male Thread and Screws with Cover - Antique Brass - Combine with E27 10mm Lampholder
Small back plate for table/standard lamp
ElekTek Solid Brass Back Plate Lamp Holder Mount, 1/2" Mounting Boss with Screws