This listing is for one 031 nut for power head on a Gribaldi Salvia Sickle Bar Mower. Fits models 72, 2401 and 394 sickle bar mowers. See position 10 in the exploded view diagram. We also have other parts for this sickle bar mower available in our eBay store We sell many replacement parts for the most manufacturers of tillers, finish mowers, spreaders, 3-point hitch hay tedders and sickle bar mowers. 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. Part Number:031 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.