3/8 x 3 1/2 Alloy Steel Socket Head Shoulder Screw (Stripper Bolt) with Nylon Insert gives engineers a stripper bolt option for applications where the shoulder geometry is central to movement or location. This stripper bolt format is chosen when a mating part must ride, pivot, stop, or space against the shoulder. Typical applications include assembly equipment, pivoting components, locating nests, and serviceable machine designs. The nylon insert adds resistance to loosening in vibration-prone or movement-related assemblies without changing the basic shoulder function. Machine builders can use the internal hex drive and shoulder geometry in compact assemblies that still require service access. This product family helps support controlled movement in fixtures, guides, pivots, and stops. It is appropriate for buyers comparing shoulder screws by exact shoulder diameter, shoulder length, material, and insert feature. Call Cold Headers at 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.