TOYOTA 91553-80628 Flange Bolt

The genuine (OEM) TOYOTA 91553-80628 flange bolt is a premium-quality, high-strength fastener engineered for the secure and durable fastening of various mechanical and structural assemblies of the vehicle. The flanged design acts as an integrated washer, providing a larger bearing surface that evenly distributes clamping force and prevents damage to fastened components or vibration-induced loosening.

Technical Features and Specifications:

• Manufacturer: TOYOTA (Genuine OEM part)
• Part Number: 91553-80628
• Part Type: Flange bolt
• Material: High-tensile, hardened steel
• Surface Treatment: Corrosion-resistant coating against environmental factors and rust
• Design: Integrated flange (washer) that eliminates the need for separate flat washers, reducing assembly time and potential failure points

Function and Importance:

Flange bolts are used throughout the automotive industry in critical applications such as suspension components, engine accessories, transmission mountings, and structural body elements. Genuine TOYOTA parts guarantee strict adherence to factory tolerances, precise thread pitch, and the correct tensile strength class, which are essential for safe vehicle operation.

Signs of Wear and Failure:

• Corrosion: Surface rust or deeper corrosion weakens the bolt material, which can lead to breakage.
• Thread Damage: Tightening with improper torque (overtorquing) can cause thread stretching or stripping.
• Deformation: Severe mechanical stress or impact can cause the bolt to bend.
• Loosening: If the bolt loses its tension, it can lead to rattling, instability, or even detachment of the fastened components.

To ensure safe and reliable operation, damaged, corroded, or stretched bolts should always be replaced with genuine OEM parts, tightened to the manufacturer's specified torque values.