TOYOTA 94151-21601 Flange Nut

The Toyota 94151-21601 genuine part is a premium-quality, high-strength flange nut. This fastener is specifically engineered to meet Toyota's rigorous factory standards, ensuring maximum reliability and precise fitment at critical fastening points.

The flange nut features an integrated flange washer that expands the bearing surface area. This design distributes clamping force evenly, prevents surface damage to the fastened components, and significantly reduces the risk of vibration-induced loosening, eliminating the need for a separate washer.

Technical Characteristics and Specifications

• Type: Flange Nut
• Manufacturer: TOYOTA (Genuine OEM part)
• Material: High-tensile, hardened steel for maximum torque tolerance
• Surface Finish: Corrosion-resistant zinc-plated or phosphated coating for protection against environmental influences
• Thread Profile: Precision metric thread for optimal and secure fastening

Role and Importance in the Vehicle

Flange nuts are utilized across various areas of the vehicle, including suspension components, the engine compartment, the exhaust system, and body mounting points. Their purpose is to provide a durable, vibration-resistant connection even in locations subjected to dynamic driving stresses.

Signs of Wear or Failure

• Thread Damage or Thread Stretching: As a result of overtightening or improper installation, threads may deform, compromising clamping force.
• Corrosion and Rusting: In areas exposed to moisture and road salt, compromised surface protection allows rust to weaken the material structure.
• Deformation: Due to mechanical damage or the use of improper tools, the hex head can become rounded or stripped, complicating removal and installation.

For safe operation, always replace damaged, corroded, or stretched fasteners with new, genuine Toyota parts.