TOYOTA 90159-60431 Bumper Screw with Washer

This genuine Toyota (OEM: 90159-60431) screw with washer is an OEM-quality fastener specifically engineered for the secure and durable mounting of body components, particularly bumpers, fender liners, and lower engine splash shields.

Technical Features and Construction

The integrated washer (screw-with-washer) design delivers several technical advantages during automotive assembly:

• Integrated Washer: The washer expands the load-bearing contact area, evenly distributing clamping force. This is critical when securing plastic bumpers and trim panels, as it prevents fastening tabs from cracking or deforming.
• Corrosion Protection: The screw surface is treated with a specialized anti-corrosion coating that resists mud, moisture, road salt, and harsh weather conditions.
• Vibration Resistance: The integrated washer and precision thread design minimize the risk of self-loosening caused by ongoing vehicle vibration.

Function and Importance

Bumper mounting screws play an essential role in preserving the structural integrity and aerodynamic stability of exterior vehicle components. Without proper fastening, underbody covers and panels can shift, rattle, or detach under wind resistance, creating a road safety hazard.

Signs of Failure or Wear

• Severe Corrosion: Rust can weaken the screw head or cause the threads to seize, making maintenance and servicing difficult.
• Mechanical Damage: Using improper tools or overtightening can strip the screw head or damage the threads.
• Loose Fitment: If the screw threads or the mounting point are worn out, the bumper or panel may rattle, and noticeable gaps may develop between body components.