5/16 x 3 1/4 Alloy Steel Socket Head Shoulder Screw (Stripper Bolt) with Nylon Insert provides a defined shoulder for controlled movement, accurate positioning, and serviceable fixture design. Engineers use this style when ordinary clamping hardware would not provide the guide, pivot, spacer, or stop function required. Typical applications include material-handling systems, transfer equipment, moving plates, and plant maintenance work. For maintenance teams, the nylon insert can help address loosening concerns in equipment subject to vibration or repeated motion. Maintenance professionals may use this style when worn guide, stop, spacer, or pivot hardware needs a direct shoulder-size replacement. The socket head shoulder screw format is well suited to serviceable machinery where access and repeatable location are both important. Common sourcing contexts include replacement maintenance, fixture construction, and OEM production support. Call Cold Headers at 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.