Spring External Retaining Ring DIN 983

The DIN 983 spring external retaining ring is used in machine building, instrument manufacturing, and automotive repair at service stations. The ring is a fastening element installed together with bolts, studs, or screws of matching sizes, providing additional fixation through the bending of its outer tabs. The center of the ring has a hole for the fastening element.

The material is spring steel, which allows repeated bending without loss of elastic properties. For installation in high-humidity conditions, coated versions are available: oxide coating or phosphating. The coating increases the ring’s resistance to environmental exposure, reduces the risk of corrosion, and extends the service life of the fastener.

The rings are available in various diameters, making it possible to select the size for a specific task.