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This is a high-strength fastener designed for medium- and heavy-duty axle carrier assemblies. It is a critical component for maintaining the integrity of the driveline in commercial trucks and industrial vehicles.

To ensure reliability, these nuts are ultrasonically tested for internal cracks that standard magnetic testing might miss. Many versions also feature a self-locking mechanism (often a nylon insert) to resist loosening from constant vibration. Technical Specifications 126155

The number primarily identifies a critical heavy-duty automotive component: the Differential Pinion Shaft Nut (also known as an Input Nut) manufactured by Dana Spicer and Eaton . Product Overview This is a high-strength fastener designed for medium-

Specifically used for differential pinion shaft applications in Eaton Axle models DS461 and DT461 . Many versions also feature a self-locking mechanism (often

Based on manufacturer data from MPParts and Drivetrain America , the standard specifications include: Spicer Differential Pinion Shaft Nut 126155 - FleetPride

Built from SAE-4340 nickel chromoly steel . The inclusion of nickel adds toughness, while chromium provides strength at high temperatures and resistance to abrasion.