The Eaton Fuller Lock Washer, part number X3-1201M or X31201M, is a genuine OEM transmission hardware component designed for use in Eaton Fuller manual transmission assemblies. Also cross-referenced as HFX3-1201M, this lock washer is sold individually and is categorized under manual transmission gear components. Lock washers in this family serve a critical retention function, securing fasteners against loosening under the vibration and load cycles common in heavy-duty drivetrain applications. Order from Pro Gear and Transmission, or call us to confirm this is the right part for your transmission.
Features
Genuine Eaton Fuller OEM transmission hardware
Part number X3-1201M or X31201M, also cross-referenced as HFX3-1201M
Designed for Eaton Fuller manual transmission assemblies
Sold individually (each)
Fastener retention component for heavy-duty drivetrain service
