Tanged Lock Washer 2.5in

The Tanged Lock Washer 2.5in by WINTERS is a precision fastening component engineered for high-performance automotive applications, particularly Grand National spindle nut assemblies. This lock washer prevents fastener rotation and loosening caused by vibration, shock, and thermal cycling—critical for maintaining wheel bearing integrity and suspension geometry. Designed for professionals and enthusiasts who demand reliability in mission-critical drivetrain systems, this tanged lock washer provides mechanical locking that outlasts friction-dependent alternatives.

Constructed from hardened steel, the Tanged Lock Washer 2.5in features a 2.391-inch inner diameter and 2.836-inch outer diameter with a precision thickness of 0.03 inches—dimensions engineered to seat flush against spindle nut flanges while the integrated tang (lock tab) engages a key slot on the mounting surface. This mechanical locking method is superior to split rings or tooth washers in heavy-vibration environments because it prevents slippage through positive engagement rather than spring tension. The compact 0.05-pound weight and minimal profile ensure zero impact on rotating assembly balance while delivering maximum holding power across temperature extremes and repeated assembly cycles.

This lock washer is essential for rear-wheel spindle nut installations on 2.5-inch Grand National applications, where bearing preload and axle retention directly affect vehicle safety and handling. Restoration specialists, drag racing teams, and high-performance shops rely on WINTERS fastening components to prevent catastrophic spindle failures. Installation requires alignment of the integral tang with the corresponding slot on the spindle shaft before final torque application. Each unit is sold individually; verify spindle diameter and slot configuration before ordering to ensure proper fit and function.