B&Q Black Edison screw cap (E27) Lampholder | DIY at B&Q
Plastic Lamp Holder with two screw rings and male thread - White (E27) - Kynda Light
1X E27 Light Bulb Holder Base Fitting Screw Case Socket AU Fixing Lamp Z2D3 - Walmart.com
E27 Black Phenolic Fully Threaded Skirt Lamp Holder with 1/8ips Threaded Cap
Superdream Brass Screw Thread DIY Light Socket Vintage Copper Edison Retro Pendant Lamp Holder for E26 E27 Light Bulbs, with Golden Key Switch Multi-Function Socket (1 Pack) - Amazon.com
White Black 4a Half Tooth Screw E27 Lamp Holder Energy Save Chandelier Led Bulb Head Socket Fitting Vintage Light Base 250v E26 - Lamp Bases - AliExpress