5/8 x 5 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. The shoulder screw design separates the functional bearing or locating surface from the threaded retention point. Typical applications include tool and die work, mold-related fixtures, guide mechanisms, and service parts. The nylon insert supports resistance to loosening while the shoulder continues to provide the bearing, guide, spacer, or locating surface. OEM manufacturers may specify this part where a defined shoulder supports repeatable assembly motion and controlled component location. The design is useful when the fastener is part of the positioning system rather than only a threaded clamping point. 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.