1/2 x 4 1/2 Alloy Steel Socket Head Shoulder Screw (Stripper Bolt) with Nylon Insert offers a practical solution when tooling or machine components need both socket-drive retention and a functional shoulder. The shoulder screw design separates the functional bearing or locating surface from the threaded retention point. Typical applications include machine building, production fixtures, repair programs, and replacement applications. 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. 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.