One replacement slip clutch bolts for slip clutches with 4 friction disc by Eurocardan and used on many brands of equipment. These are a 10mm fine thread bolt and nut are used to adjust the tension of the clutch springs. Each slip clutch will use 8 of these bolts and nuts. We also have the shorter bolts for 2 friction disc slip clutches listed in our online store. 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: 6691010 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.