TOYOTA 90119-08A06 Bolt with Washer

The Toyota 90119-08A06 is a genuine OEM hex head bolt with an integrated washer, engineered and manufactured specifically to the strict standards of Toyota and Lexus vehicles. This fastener plays a vital role in providing secure, vibration-resistant retention for various mechanical and structural components.

Technical Features and Specifications:

• Part Number (SKU): 90119-08A06
• Manufacturer: TOYOTA (Genuine OEM part)
• Part Name: Bolt with washer
• Design: Hex head bolt with a captive, free-spinning or pressed washer that prevents the washer from being misplaced during assembly.
• Material Grade: High-tensile, hardened alloy steel engineered to withstand high mechanical loads.
• Surface Treatment: Anti-corrosion coating (galvanization or specialized passivation) offering protection against moisture, grime, and road salt.

Function and Importance:

Bolts with integrated washers (SEMS bolts) are highly effective in automotive engineering. Key functions of the integrated washer include:

• Even Pressure Distribution: Expands the bearing surface area so that clamping torque is distributed across a wider surface, preventing deformation or cracking of fastened components (particularly aluminum or plastic parts).
• Surface Protection: Prevents the bolt head from scoring or damaging the surface coating of fastened parts during rotation, preventing premature corrosion.
• Loosening Prevention: Reduces the risk of spontaneous loosening caused by engine and road vibrations.

Signs of Wear or Failure:

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

• Thread Damage: Threads may stretch or strip due to over-torquing.
• Severe Corrosion: Heavy rust weakens the material and complicates subsequent removal.
• Rounded Bolt Head: Using improperly sized or worn tools can round the hex head, making it impossible to tighten to proper torque specifications.

To maintain safe operation in accordance with factory specifications, damaged, stretched, or heavily corroded bolts should always be replaced with genuine Toyota parts.