Lock retaining washers and nuts are round with a hole in the centre and can be used where loosening from corrosion or vibration is a concern. 100% Brand new and high quality. Made of aluminium material M10 washers. These are M10 threaded lamp nipples and they are hollow for threading cable. This is ideal for lamps, chandeliers, candelabras and other light fittings or any type of project.
