TOYOTA 94512-01000 Spring Washer

The genuine OEM Toyota 94512-01000 spring washer is a premium-quality fastener specifically engineered to secure critical bolted joints in vehicles. Spring washers (also known as split lock washers) are essential for securely fastening mechanical assemblies subjected to vibration, dynamic loads, and temperature fluctuations.

Operating Principle and Importance

A spring washer is a specially formed split ring that compresses as the fastener is tightened. This compression creates a continuous axial spring force between the bolt head (or nut) and the mating surface. This constant tension significantly increases thread friction, preventing the bolted connection from spontaneously loosening under vibration or thermal expansion.

Technical Specifications

• Manufacturer: TOYOTA (Genuine OEM part)
• Part Number: 94512-01000
• Part Type: Spring Washer
• Material: High-strength, hardened spring steel for maximum elasticity and durability
• Surface Treatment: Corrosion-resistant protective coating resistant to moisture, road grime, and chemicals

Signs of Wear and Failure

Spring washers are considered single-use fasteners during major maintenance procedures. The following symptoms indicate that replacement is required:

• Loss of Elasticity: If the washer remains completely flat after loosening the bolt, it can no longer provide the necessary tensioning force.
• Visual Damage: Cracks, fractures, or material fatigue along the split cut.
• Severe Corrosion: Rust degrades the elasticity and structural integrity of the steel, potentially leading to fracture.

To ensure safe and reliable operation, it is always recommended to replace any loosened or removed spring washer with a new, genuine Toyota component.