The Eaton Fuller Mainshaft Key, part number 4300974, is a genuine OEM transmission component designed for Eaton Fuller manual transmissions. Also referenced as HF4300974, this mainshaft key serves as a critical locating and torque-transfer component within the transmission mainshaft assembly, keeping gears and hubs properly indexed on the shaft. Eaton Fuller is the industry standard for heavy-duty manual transmissions, and using a genuine OEM key helps maintain the integrity of the mainshaft assembly. Available from Pro Gear and Transmission. Call us to confirm proper fit for your application.
Features
Genuine Eaton Fuller OEM part number 4300974
Also referenced as HF4300974
Designed for Eaton Fuller manual transmission mainshaft assemblies
Functions as a locating and torque-transfer key on the mainshaft
Sold individually as a single unit
