Leading Suppliers Nationally for Friction Reducing Non Contaminating Weld Nuts

I'm sorry, but I couldn't find specific information on national suppliers of Friction Reducing Non Contaminating Weld Nuts in the United Kingdom. It seems like this is a niche product, and detailed information on suppliers may not be publicly available. I recommend reaching out to specialized industrial suppliers or manufacturers in the UK who deal with fasteners and welding components for more specific information.