Hillman 1/2 in. External Retaining Ring (10-Pack) 881388 - The Home Depot
Snap Ring Shop Assortment, Alloy Steel Internal Retaining Ring 325 Piece 15 Sizes C-Clips External Retaining Ring Assortment Kit, Circlip Retainer Rings Set for Axles, Shafts and Other Moving Parts: Amazon.com: Tools