The Eaton Washer Pinion Nut, part number MJAHN104-1 or MJAHN1041, is a differential hardware component designed to seat against the pinion nut in Eaton-equipped axle assemblies. This part also cross-references under the Spicer designation MJAHN104-1, catalogued as an axle nut washer in the driveline and axles hardware category. Sold individually, it is a straightforward but critical piece of axle hardware, a correct-fitting washer keeps pinion preload settings consistent and prevents nut back-off. Pro Gear and Transmission stocks genuine Eaton differential parts. Call us to confirm proper fit for your specific axle.
Features
Genuine Eaton pinion nut washer for heavy-duty differential applications
Part number MJAHN104-1 or MJAHN1041; also cross-references as Spicer MJAHN104-1
Sold as individual unit (each)
Functions as axle nut washer to maintain pinion preload integrity
Direct-fit Eaton differential hardware replacement
