Spring plungers are machine elements for positioning and fixing workpieces. They are commonly used to position and lock parts in place. They are detent devices that, as the name suggests, are designed for use in indexing bores, available in different types, like indexing plunger, spring loaded plunger. Spring plungers are available in different materials. Some of the most popular materials in which they are made include stainless steel and carbon steel. In addition to stainless steel and carbon steel, many indexing plungers feature a finish. The body, for instance, may be plated in zinc alloy, and the plunger may feature an oxidized steel finish.