21986-6 is an external retaining ring designed for mechanical assembly and fastening applications. This component is manufactured by TE Connectivity and is classified as an active product. The retaining ring is EU RoHS/ELV compliant, meeting the substance restrictions of the RoHS2 Directive 2011/65/EU and the End of Life Vehicles Directive 2000/53/EC. External retaining rings are commonly used to secure components on shafts and in housings, providing reliable retention in various industrial and electronic applications.