TOYOTA 91553-E1035 Flange Bolt

This genuine Toyota (SKU: 91553-E1035) flange bolt is a premium-quality, high-strength fastener specifically engineered to securely fasten vehicle structural and mechanical assemblies. The flanged design acts as an integrated washer, evenly distributing clamping force across mating surfaces to prevent material deformation and enhance joint stability against vibrations.

Technical Features and Specifications:

• Manufacturer: TOYOTA (Genuine OEM part)
• Part Number: 91553-E1035
• Part Type: Flange bolt
• Material: High-tensile, hardened steel alloy
• Surface Treatment: Corrosion-resistant protective coating for durability
• Design: Hex head with integrated flange for more efficient torque transfer

Role and Importance of the Flange Bolt:

Due to the continuous vibrations and temperature fluctuations encountered during vehicle operation, conventional bolted joints are prone to loosening. This genuine Toyota flange bolt eliminates the need for separate washers, thereby reducing the possibility of assembly errors and ensuring long-lasting retention of the clamping torque specified by factory standards. It is most commonly used in the engine compartment, on suspension components, and on chassis reinforcements.

Typical Signs of Wear or Failure:

• Thread Damage: Tightening with improper torque (overtightening) can lead to thread stretching or stripping.
• Corrosion: In areas exposed to moisture and road salt, damage to the protective coating can lead to rust formation, weakening the bolt's strength.
• Fatigue Failure: Under extreme mechanical stress or prior overstressing, hairline cracks may develop beneath the bolt head, ultimately leading to bolt breakage.

To ensure safe operation, damaged, stretched, or corroded bolts must always be replaced immediately with genuine OEM Toyota parts.