TOYOTA 91674-80822 Flange Bolt with Washer

The Toyota (SKU: 91674-80822) is a genuine OEM high-strength flange bolt with integrated washer (BOLT, FLANGE W/WASHER). This fastener is specifically engineered according to Toyota's strict factory specifications, ensuring maximum reliability and a precise fit across various structural and mechanical assemblies.

Technical Features and Construction

The flange bolt features an integrated washer that plays a crucial role in the fastening process. The built-in washer increases the contact surface area, thereby distributing clamping force more evenly across the fastened components, preventing material deformation or damage during torquing. Additionally, it reduces the risk of loosening caused by vibration.

• Manufacturer: TOYOTA (Genuine OEM part)
• Part Type: Flange bolt with integrated washer (Bolt, Flange w/Washer)
• Material Quality: High-tensile, hardened steel to withstand maximum shear and tensile loads
• Surface Treatment: Corrosion-resistant coating offering protection against moisture, mud, and road salt
• Thread Design: Precision metric thread for optimal and secure fastening

Function and Importance

In vehicles, flange bolts are utilized in critical locations where a secure, stable joint resistant to vibrations and dynamic loads is required (such as suspension components, engine block accessories, transmission mountings, or structural body points). Genuine Toyota OEM bolts guarantee that fastening points withstand the factory-specified tightening torque without stripping threads or shearing the bolt head.

Signs of Wear and Failure

Although fasteners are durable components, replacement is essential in the following cases:

• Corrosion and Rust: Surface rust weakens the material structure, which can lead to breakage.
• Thread Damage: Overstretched bolts or those tightened with incorrect torque can suffer thread deformation, compromising holding power.
• Deformation or Elongation: Excessive mechanical stress can cause the bolt shank to stretch, preventing it from maintaining the required clamping force.
• Damaged Bolt Head: Rounding or stripping caused by tools makes proper disassembly and assembly difficult.