5/16 x 2 Alloy Steel Socket Head Shoulder Screw (Stripper Bolt) with Nylon Insert provides a defined shoulder for controlled movement, accurate positioning, and serviceable fixture design. Unlike a standard socket head cap screw, the unthreaded shoulder is the working surface for bearing contact, location, or controlled travel. Typical applications include automation equipment, indexing stations, positioning assemblies, and OEM machinery. The nylon insert adds resistance to loosening in vibration-prone or movement-related assemblies without changing the basic shoulder function. OEM manufacturers may specify this part where a defined shoulder supports repeatable assembly motion and controlled component location. Selection should follow the required shoulder diameter, shoulder length, material, and assembly function shown for the part. 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.