TOYOTA 90170-12021 Suspension Hexagon Nut

The genuine OEM part with part number TOYOTA 90170-12021 is a premium quality, high-tensile suspension hexagon nut. This fastener plays a critical role in the safe assembly of the vehicle's suspension and chassis system, ensuring the stable and secure mounting of various control arms, ball joints, shock absorbers, or sway bars.

Technical Specifications and Features:

• Type: Hexagon nut for suspension
• Material Quality: High-tensile, hardened steel engineered to withstand extreme dynamic and static loads acting on the chassis.
• Surface Treatment: Specialized anti-corrosion coating (galvanized or phosphated layer) that provides protection against the adverse effects of moisture, mud, and winter road salt.
• Thread Design: Precision metric thread ensuring a perfect fit and accurate adherence to factory torque specifications.

Role and Importance of the Suspension Nut:

Suspension components are constantly subjected to continuous vibration, impacts, and environmental influences. A reliable fastening nut prevents critical joints from loosening, which directly impacts vehicle driving stability and road safety. Genuine Toyota fasteners ensure clamping force and durability in full compliance with factory specifications.

Maintenance and Replacement Information:

During suspension repairs or the replacement of related components (e.g., shock absorbers, ball joints), it is almost always recommended to replace fastening nuts with new genuine parts. Due to mechanical fatigue, thread stretching, or corrosion, reusing old nuts can be hazardous. Always adhere to the manufacturer-specified tightening torque values during installation.