3/8 x 1/2 Alloy Steel Socket Head Shoulder Screw (Stripper Bolt) with Nylon Insert is frequently selected where dies, fixtures, cams, or linkages require a shoulder surface for repeatable motion. Unlike a standard socket head cap screw, the unthreaded shoulder is the working surface for bearing contact, location, or controlled travel. 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. OEM manufacturers may specify this part where a defined shoulder supports repeatable assembly motion and controlled component location. 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.