This spring can be used with the specific threaded GU10 base (see accessories at the bottom of the product data sheet).
It can be used as a reducer adaptor on a lampshade designed for a 28 mm diameter E12 or E14 plastic lampholder and can also be used to fix it in a hole for luminaire glassware.
Product description :
Spring ring for GU10 base or E14 and E12 threaded socket
Thread diameter: 28mm
Holding diameter between 45mm and 33mm
Material: chrome-plated steel
