Special Retaining Ring / CirclipExcept standard sizes, we can also design non-standard circlips / retaining rings according to your drawings or samples.Material: Carbon spring steel Mn65 / C67S / C70.Stainless Steel ANSI 420, 304.Surface Finish: Black Phosphating, Black Oxide, Zinc Plating. They're widely used for Axletree fitting, Auto parts, Pump field, Tractor, power transmission products and so on.