One replacement slip conical pin with nut and washer used on 1-3/4" X 20 spline slip clutch hubs to secure the clutch to the gearbox shaft. These are slightly longer than the conical pin used on the 1-3/8" X 8 spline shafts which can be found listed in our online store. Used on Eurocardan PTO shaft with slip clutch with 1-3/4" X 20 spline hubs that were used on equipment manufactured by several implement manufacturers. We sell all of the replacement parts for the rotary cutters. If you don't see the parts you need listed please contact us we would love to earn your business. We are listing new items frequently so please check our store often. Replaces Code: 6821484 We stock a wide variety of replacement parts for Agricultural Equipment please contact us if you have any questions or if you would like more information.