Spicer Differential Pinion Shaft Nut EAT127588
The Spicer Differential Pinion Shaft Nut EAT127588 (CCC PARTS, via Wofford Truck Parts) meets strict OEM standards for reliability in heavy duty axle assemblies. With its M39 × 1.5 thread pitch and 55-mm wrench flats, it ensures a tight and dependable fit on Spicer, Eaton, and other driveline systems. This nut resists loosening under torque and vibration, making it ideal for trucks operating under loading or torque cycles. Its precision machining and hardened steel construction support long service life.
$13.01
Specifications
The Spicer Differential Pinion Shaft Nut EAT127588 from CCC PARTS (distributed through Wofford Truck Parts) is engineered for rigorous performance in heavy duty drivetrain applications. This lock nut is used to secure the differential pinion shaft within axle assemblies, locking the bearing preload and preventing axial movement under load. It features a fine M39 × 1.5 metric thread and wide 55-mm flats for socket engagement, allowing reliable torque application. Manufactured from high-strength hardened steel, it resists deformation and wear under vibration and high torque loads. The nut is fully compatible with Spicer / Eaton axle assemblies and is often used in truck, bus, and heavy equipment differentials. Precise machining and surface finishing ensure a consistent, tight tolerance fit to maintain torque retention and dependable performance over long duty cycles.
