TOYOTA 91512-61035 Flange Bolt

This genuine TOYOTA flange bolt with part number 91512-61035 is a premium quality OEM fastener that guarantees maximum reliability and precise fitment. Flange bolts play a crucial role in securely fastening various structural and mechanical assemblies in motor vehicles.

Technical Features and Benefits

• Manufacturer: TOYOTA (Genuine OEM part)
• Part Number: 91512-61035
• Replacement / Alternative Numbers: 9151161035
• Design: Hexagon head bolt with an integrated washer (flange) that ensures uniform pressure distribution and prevents damage to mating surfaces.
• Material Quality: High-tensile, hardened steel alloy engineered to withstand heavy mechanical loads and vibration.
• Surface Protection: Specialized anti-corrosion coating protecting the fastener against moisture, road salt, and other environmental impacts.

Function and Significance of Flange Bolts

Flange bolts are utilized in applications where the risk of loosening due to vibration is high, or where uniform clamping force must be applied across the mating surface without requiring a separate washer. The integrated flange expands the contact surface area, thereby reducing surface pressure and preventing the bolt head from embedding into softer materials (such as aluminum castings).

Signs of Wear or Failure

Although genuine Toyota bolts are exceptionally durable, replacement may become necessary in the following cases:

• Thread Damage or Stretching: Overtightening (applying torque beyond specified limits) can lead to thread deformation or bolt shank stretching.
• Corrosion: Severe rust weakens the material structure of the bolt, posing a risk of fracture.
• Mechanical Damage: Tool slippage during installation or use of incorrect tools can round the corners of the hex head, making subsequent loosening or tightening difficult.

To ensure safe operation, it is recommended to replace loosened or removed critical fasteners with new genuine OEM parts, especially when servicing suspension and engine components.