| [1] The standard coupling nut is black epoxy-coated zinc. For stainless steel, add "1" on the end. For nickel-brass, add "3" [2] The standard coupling nut is nickel-plated brass. For 316 Hex stainless steel, add an "8" at the end [3] The standard coupling nut is nickel-plated brass with Teflon coating. For 316 Hex stainless steel, add an "8" at the end |