M8 x 12 Alloy Steel Metric Socket Head Shoulder Screw (Stripper Bolt) offers a practical solution when a fastener must also act as a bearing surface, stop, pivot, spacer, or guide. Unlike a standard socket head cap screw, this shoulder screw uses its unthreaded shoulder as the working surface while the threaded end retains the fastener. Common uses include machine tools, production fixtures, stop blocks, and pivoting machine elements; related sourcing may also include assembly fixtures. For engineers, the shoulder geometry helps solve positioning and bearing-surface requirements without converting the metric dimensions to inch sizes. The result is a serviceable metric shoulder screw for controlled movement, fixture alignment, and OEM production support. It can also support guide mechanisms, fixture stops, and replacement maintenance where a consistent shoulder surface is part of the design. Call Cold Headers at 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.