While commonly called "e-rings" that refers to one type of metric retaining ring and there are dozens of types in many materials, both internal and external. The internal style has the protrusions facing inward, hence the name internal. The external type has the protrusions facing outward, hence the name external.

Metric retaining rings (also known as Circlips or snap rings) clamp onto difficult-to-attach round shafts and bores to hold them in the proper place since the design of most shafts or bores makes them difficult to attach to with other methods. A metric retaining ring clamps around them and creates a shoulder that keeps the part in place.

Hardware Everywhere offers hundreds of metric retaining rings to meet any application requirements. We can provide them both stacked and unstacked with various color platings. They also come made of steel, stainless, and bronze.

Put our 65 years of experience to work for you. We are the leading online distributor of retaining rings and any other hardware you may need. Call us at 1-800-432-8979 or contact us online with any questions or for a custom quote.