UK Bayonet Cap bulb holder suitable for use in standing lamps or ceiling pendants.
Made from strong thermoset black Bakelite. Earth not needed Screw terminals with built-in wire strain relief and cord grip. 10mm threaded entry for use with table lamps etc.
Bayonet bases or caps are often abbreviated to BC, often with a number after. The number refers to the diameter of the base (e.g., BC22 is a 22 mm diameter bayonet cap lamp). BC15, a 15 mm base, can also be referred to as SBC standing for small bayonet cap. The lower-case letter s or d specifies whether the bulb has single or double contacts.