John Deere Original Equipment Snap Ring T40187, Ring, Retaining. Shaft Diameter: 12.700 mm. Groove Diameter: 11.176 mm. Groove Width: 1.422 mm. Width: 1.270 mm. Radial Width: 2.464 mm. Material: 1065. Style: A. Finish: B. Fits various John Deere models. This is a genuine John Deere Part. Thanks for looking!