5/8 x 2 1/4 Alloy Steel Socket Head Shoulder Screw (Stripper Bolt) with Nylon Insert helps locate or guide moving parts in equipment where alignment and controlled travel are part of the design. The important engineering feature is the shoulder, which supports positioning and movement while the threaded end retains the fastener. Typical applications include cams, linkages, pivot arms, guide blocks, and machine stops. The nylon insert supports resistance to loosening while the shoulder continues to provide the bearing, guide, spacer, or locating surface. Machine builders can use the internal hex drive and shoulder geometry in compact assemblies that still require service access. 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.