5/16"-18 x 3‑1/2" Stainless Steel 316 Hex Cap Screw, Full Thread, UNC Coarse

Manufactured from Type 316 stainless steel, the 5/16"-18 x 3‑1/2" UNC coarse‑thread hex cap screw is built for longer‑reach fastening where high corrosion resistance and consistent mechanical performance are essential. The full‑thread design provides continuous thread engagement from head to tip, supporting uniform clamping force and secure joint integrity in thick or multi‑layer assemblies. A standard hex head allows reliable torque application with common hand tools, enabling precise and repeatable installation. Commonly used in marine hardware, chemical processing equipment, food‑grade systems, and outdoor industrial assemblies, this fastener delivers dependable strength and extended service life in environments exposed to moisture, chemicals, and corrosive conditions.