Genuine Tecumseh 640055 High Speed Bowl Nut OEM Brand New Genuine Tecumseh High Speed Bowl Nut... We are an Authorized Tecumseh Dealer... High Speed Bowl Nut Genuine Tecumseh Part # 640055 Fits Specific Tecumseh Model Engines Genuine OEM Tecumseh Part If you need assistance locating correct part, Please email Model, Spec and Serial numbers of your engine and we will gladly look up correct parts