Grade 12.9 Metric Part Thread Flat Head Socket Cap Screw, Alloy Steel
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Flat Head Socket Cap Screws are used for flush mounting of sections, usually where one part slides over another part or one part is mounted on another. Flat head screws are limited by configuration in their tensile strength capability. Thermal Black Oxide finish features a standard heat treatment finish which includes light drying oil; Chemical Black Oxide is a chemical treatment plus rust resistant with no drying oil.