TOYOTA 90942-01103 Wheel Hub Nut with Washer

The genuine TOYOTA 90942-01103 wheel hub nut with washer (NUT, HUB W/WASH) is a premium-quality, high-strength fastening component specifically engineered for the safe and secure mounting of vehicle wheels. Its integrated washer design (known as a mag seat or flat seat style) ensures uniform clamping force distribution while protecting the delicate mounting holes of alloy wheels from damage and galling.

Technical Characteristics and Specifications:

• Thread Size: M12 x 1.5 (Toyota standard)
• Design: Flat seat with integrated captive rotating washer (Flat seat with washer)
• Hex Size (Wrench Size): 21 mm
• Material: Hardened, high-strength carbon steel
• Surface Finish: Corrosion-resistant chrome plating for durability and an aesthetic appearance

Function and Importance:

The wheel nut is a vital safety component within the chassis and running gear system. Its function is to securely fasten the wheel rim to the wheel hub, withstanding the dynamic and static loads encountered during driving. The integrated washer reduces friction during tightening, allowing for more precise torque values and minimizing the risk of wheel stud over-stretching or loosening.

Signs of Wear or Failure:

• Damaged Threads: Overtightening, improper torque, or cross-threading can strip the thread pitch.
• Corrosion and Rust: Exposure to winter road salt and moisture can compromise the chrome layer, leading to oxidation.
• Rounded Corners: Using incorrect or worn socket tools can round off the hexagonal profile.
• Damaged or Seized Washer: If the washer no longer rotates freely or has become deformed, it will fail to provide the correct clamping force.