5/8 x 1 1/4 Alloy Steel Socket Head Shoulder Screw (Stripper Bolt) with Nylon Insert is designed for assemblies requiring a shoulder screw that can fasten while also serving as a guide, pivot, or spacer. The socket head allows internal hex drive access, while the shoulder provides the surface used by the assembly. Typical applications include assembly equipment, pivoting components, locating nests, and serviceable machine designs. A nylon insert helps add loosening resistance where repeated motion, equipment vibration, or service conditions can work against threaded retention. Repair technicians may source this part for replacement applications where motion control and retention both matter. Alloy steel construction supports industrial fastening applications where the shoulder performs the working role in the assembly. 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.