TOYOTA 94512-01200 Spring Washer

The genuine Toyota 94512-01200 spring washer is a premium-quality, precision fastening component engineered specifically to secure critical bolted joints in vehicles. The primary function of a spring washer is to prevent bolts and nuts from unintentionally loosening under continuous vibration, shocks, and temperature fluctuations.

Technical Specifications and Features

• Manufacturer: Toyota OEM
• Part Number: 94512-01200
• Part Type: Spring Washer
• Material Composition: Hardened, high-elasticity spring steel with exceptional shape-recovery properties.
• Surface Protection: Specialized corrosion-resistant coating protecting the component against moisture, mud, and road salt.
• Operating Principle: Upon tightening, the washer is compressed and exerts a continuous axial tension between the bolt head and the mating surface, maintaining proper clamping force.

Function and Importance

During vehicle operation, the engine, suspension, and drivetrain are subjected to continuous dynamic loads and high-frequency vibrations. Without proper locking, threaded fasteners can loosen over time, leading to severe mechanical failures or hazardous conditions. This genuine Toyota spring washer ensures the long-term retention of factory tightening torque.

Signs of Wear and Replacement

Although spring washers are exceptionally durable, replacement is recommended during maintenance and repairs, as the following conditions may occur:

• Loss of Elasticity: Repeated use or overloading can cause permanent deformation (flattening), preventing the washer from generating sufficient tension.
• Material Fatigue and Cracking: Continuous dynamic stress can cause micro-cracks in the steel structure, potentially leading to washer fracture.
• Corrosion: If the protective coating is compromised, rust weakens the material, reducing its mechanical strength.

To ensure safe and reliable operation, it is always recommended to install a new genuine Toyota spring washer whenever loosened bolted connections are reassembled.