0-80 x 5/16 Alloy Steel Socket Head Cap Screw is specified when a machine assembly needs a high-strength alloy steel socket screw with predictable head and drive geometry. The exact 0-80 x 5/16 size helps buyers align the fastener with repair work tied to an existing fastener callout. Common uses include maintenance shops, manufacturing cells, and power transmission, where internal hex installation helps keep the joint accessible. The dimensional highlights make the listing more useful for maintenance shops and industrial distribution teams. This keeps the listing focused on the fastener geometry rather than broad catalog language. Technical Highlights Material: Alloy Steel Thread: 0-80 Length: 5/16 in. Nominal Body Diameter: .060 in. Head Diameter: 0.091 in. min / 0.096 in. max Head Height: 0.057 in. min / 0.060 in. max Hex Key Size: 0.050 Drive Type: Internal hex socket Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.