[jon@harrison.ne]

Are you sure you want a regular style hex nut i.e. not an acorn nut which is what are on my visors. I have ss hex nuts in 5/16" 10-32 which can be polished to look like chrome. First try a 10-32 nut on one of your screws to check what thread you need. By the way mine are "small pattern" nuts which have a smaller than normal head size-available in quantity from McMaster Carr.