5/16-18 x 12 1/2 Alloy Steel Socket Head Cap Screw

5/16-18 x 12 1/2 Alloy Steel Socket Head Cap Screw is stocked for maintenance and OEM buyers matching an existing long-length callout. The socket head form drives with an internal hex, allowing installation in counterbored and shielded locations where an external wrench cannot swing. Alloy steel construction gives the high tensile strength expected of socket head cap screws, appropriate for clamping structural and machine joints. This size has shipped from our floor before and is listed so the next buyer can find it without a search party. Pricing is quoted per 100 pieces; contact us for current pricing and availability on this size. If a nearby length or a modified version (point styles, tips, thread variations) is needed, ask — modification work is done on site. Orders are packaged and labeled for industrial stockroom use. The size is listed exactly as dimensioned so search and drawing callouts match one to one. Distributors and OEM purchasing teams can reference this exact size for repeat orders. The size is listed exactly as dimensioned so search and drawing callouts match one to one. Technical Highlights Material: Alloy Steel Thread: 5/16-18 Length: 12 1/2 in. Nominal Body Diameter: .312 in. Head Diameter: 0.457 Head Height: 0.306 Drive Type: Internal hex socket Finish: Plain (black)