Rectangular cross-sectional shape style, 0.204 inches minimum and 0.208 inches maximum inside diameter, not casehardened casehardening indicator, 0.023 inches minimum and 0.027 inches maximum major thickness, e ring style, external usage design

A resilient metal item, circular or nearly circular, which is designed to be inserted into an internal or external groove and retained by its own spring action, or it may have external prongs or projections designed to be inserted into a hole and retained by spring action of the prongs which grip by imbedding into the material. For items having internal prongs which perform the same function, see push on nut. It is used to keep and/or lock a part(s) in position, as a ball bearing on a shaft or in a housing. See also clip, retaining and pin, lock. Excludes:ring, connecting, round.