05-14-2014, 06:34 AM
A strong magnet is the best test for determining if the stainless will rust. The stronger the magnetic pull the more iron and the more rust prone. 316 stainless screws from West Marine have no magnetic attraction and never leave rust stains. Home Depot stainless screws have a weak magnetic pull and do stain. Cheap stainless is also more prone to crevice corrosion. China stainless is usually guaranteed to rust. Buy carefully. Capt George
