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Glossary
Plain Finish
A plain finish fastener has no additional plating or coating and is supplied in its raw, untreated metal state. Often referred to as bare metal or self-colored, this finish offers no added corrosion protection and is typically used in environments where rust is not a concern.
Appearance - Plain finish fasteners generally have a dull gray, silver, or dark metallic appearance, depending on the base material and any heat treatment. A light coating of oil may be applied to protect the surface during shipping and storage as well.