3/8 x 5 Alloy Steel Socket Head Shoulder Screw (Stripper Bolt) with Nylon Insert offers a practical solution when tooling or machine components need both socket-drive retention and a functional shoulder. The important engineering feature is the shoulder, which supports positioning and movement while the threaded end retains the fastener. Typical applications include automation equipment, indexing stations, positioning assemblies, and OEM machinery. The nylon insert adds resistance to loosening in vibration-prone or movement-related assemblies without changing the basic shoulder function. Purchasing managers get a clear shoulder-size callout for RFQ sourcing and replacement work. The design is useful when the fastener is part of the positioning system rather than only a threaded clamping point. 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.