7/8-9 x 5 Alloy Steel Socket Head Cap Screw gives engineers an internal-hex fastener for mechanical joints where socket engagement and dimensional consistency matter. For high-clamping-force joints, the 7/8-9 thread and 5 in. length help confirm the correct socket cap screw before installation. Industrial buyers may specify it for engineering departments, power transmission, and robotics where head geometry and drive access need to be predictable. The dimensional highlights make the listing more useful for maintenance shops and industrial distribution teams. The technical highlight block below retains the verified head diameter, head height, body diameter, and hex key data. Technical Highlights Material: Alloy Steel Thread: 7/8-9 Length: 5 in. Nominal Body Diameter: .875 in. Head Diameter: 1.293 in. min / 1.312 in. max Head Height: 0.864 in. min / 0.875 in. max Hex Key Size: 3/4 Drive Type: Internal hex socket Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.