Outstanding 2PCS BC to ES B22-E27 Screw Lamp Holder Led Light Bulb Lamp Socket Converter Adaptor - - Amazon.com
ElekTek B22 BC Bayonet Safety Switch Lamp Holder with Back Plate Cover & Screws | eBay
1/2 Inch BC Brass Lamp Holder 1/2 Inch Thread – Edison's Electrical
B22 BC Bayonet Cap Bakelite Lamp holders, BC Bakelite Phenolic Lampholders, Switched Push Bar Lamp Holder for Table Lamps, 10mm. Bakelite Lampholders, 1/2" Switched Lamp Holder
B22 to E27 Socket Adapter, Bayonet BC Cap B22 To E27 ES Edison Screw Converter, BC to ES Extend Lamp Holder Base, B22 to E27 Adaptor Holder Fitting 0-250V, 2A Lamp Socket
Bayonet B22 BC Ceramic Lamp Bulb Holder With Side Fixings, Replacement Coughtrie | eBay