1/4 x 3 1/4 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. The socket head allows internal hex drive access, while the shoulder provides the surface used by the assembly. Typical applications include OEM production equipment, replacement hardware, tooling support, and machine repair. A nylon insert helps add loosening resistance where repeated motion, equipment vibration, or service conditions can work against threaded retention. Machine builders can use the internal hex drive and shoulder geometry in compact assemblies that still require service access. 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.