TOYOTA 91671-80816 Flange Bolt with Washer

Toyota part number 91671-80816 is a genuine OEM flange bolt with an integrated washer (BOLT, FLANGE). Engineered to Toyota's strict manufacturing standards, this fastener ensures maximum reliability, precise fitment, and extended service life across various mechanical vehicle assemblies.

Technical Features & Product Benefits

• Integrated Flange Design: The wide flange beneath the bolt head acts as a built-in washer, distributing clamping force over a larger surface area to protect mated components from surface damage and prevent loosening.
• Premium Material Quality: Manufactured from high-tensile steel designed to withstand intense vibration, shear stress, and thermal expansion forces.
• Corrosion Protection: Coated with a protective surface treatment that provides effective defense against moisture, road salt, and harsh chemicals.
• Precision Threading: Machined to exact factory specifications to ensure accurate tightening torque and secure, dependable fastening.

Function and Importance

Flange bolts are deployed in critical automotive applications where standard fasteners risk working loose under dynamic stress and vibration. The integrated flange eliminates the need for a separate washer, reducing installation time and mitigating assembly errors during maintenance.

Signs of Wear or Damage

• Mechanical Damage: Thread stretching, stripping, or deformation typically caused by improper tightening torque.
• Corrosion: Severe oxidation or rust weakening the structural integrity of the fastener.
• Loosening: Rattling, play, or instability in secured components at the mounting points.

To ensure safe vehicle operation, damaged, stretched, or heavily corroded fasteners should always be promptly replaced with genuine Toyota OEM components.