Shoulder bolts, also known as shoulder screws, are versatile fasteners used in various industries. They feature a cylindrical, unthreaded section called the shoulder, which sits between the head and the threaded portion. This unique design allows them to act as pivot points, axles, guides, or spacers in mechanical assemblies. Made from materials like stainless steel, alloy steel, and brass, shoulder bolts offer strength, durability, and corrosion resistance. Their precise dimensions and smooth shoulders make them essential in applications requiring accurate alignment and smooth movement. This article explains what a shoulder is, its function, how it is used, the material used…