This Bayonet Cap lampholder has no thread in the base meaning you cannot screw anything into this lampholder.
Designed for hanging from a cable only.
The lampholder has 2 tags on the inside to hook the cable over this acts as a cord grip and is a perfect replacement for a standard center light pendant light fitting.
Lamp Style: BC | B22 | Bayonet Cap
Diameter Top: 39mm
Diameter Bottom: 21mm
Hole Size: 8mm
Accepts a Shade: Yes
Max Shade hole Size: 32mm