A shoulder bolt, also called a stripper bolt or shoulder screw, is a precision fastener with an unthreaded cylindrical shoulder that acts as a bearing surface, pivot, or alignment feature. Unlike standard bolts, the shoulder diameter is ground or machined to close tolerance, allowing consistent mating with bushings, linkages, and moving parts. As a Shoulder Bolt Manufacturer, we understand that the shoulder diameter, length under head, thread length, and material condition directly affect assembly function. Our integrated process begins with forging or cold heading to establish grain flow and near-net shape, followed by CNC machining to achieve concentricity and surface finish. For international customers, we consider standards, measurement systems, and documentation needs. We produce shoulder bolts in carbon steel, alloy steel, stainless steel, and other specified materials, with surface treatments selected for corrosion resistance or wear. In automation and heavy equipment, shoulder bolts often serve as pivot points, so straightness and thread runout are critical. Our 10 centering machines and 20 turning-milling composite machines help maintain these characteristics. Whether you require a custom shoulder bolt for a new design or a replacement for an obsolete part, our engineering team reviews drawings, samples, and application conditions to recommend manufacturable solutions. We support prototype through mass production, helping buyers reduce assembly issues and improve equipment reliability.
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