1-21046-3 is an external retaining ring (E-ring) manufactured by TE Connectivity for use in mechanical assemblies requiring reliable component retention. This retaining ring is designed to secure components on shafts or in grooves, providing a cost-effective solution for fastening applications. The product is compliant with EU RoHS2 (Directive 2011/65/EU) and ELV (End of Life Vehicles Directive 2000/53/EC) regulations, ensuring environmental and safety standards are met. E-rings are commonly used in automotive, industrial machinery, and consumer electronics applications where secure, non-permanent fastening is required.