1/4 x 5 1/2 Alloy Steel Socket Head Shoulder Screw (Stripper Bolt) with Nylon Insert provides a defined shoulder for controlled movement, accurate positioning, and serviceable fixture design. The shoulder screw design separates the functional bearing or locating surface from the threaded retention point. Typical applications include automation equipment, indexing stations, positioning assemblies, and OEM machinery. 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 design is useful when the fastener is part of the positioning system rather than only a threaded clamping point. 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.