U-Bolt Nut for Isuzu NPR, NPR-HD & NQR 4HK1 5.2L / 4JJ1 3.0L (2006–2018)

This new OEM U-bolt nut is designed for secure suspension and axle fastening on Isuzu NPR, Isuzu NPR-HD, and Isuzu NQR models equipped with 4HK1 5.2L or 4JJ1 3.0L diesel engines (2006–2018).

U-bolt nuts play a critical role in securing the axle to the leaf spring assembly. Over time, hardware can corrode, stretch, or lose proper torque retention due to heavy loads and road vibration. Replacing worn or damaged U-bolt nuts ensures:

• Proper clamping force on suspension components

• Secure axle-to-leaf spring mounting

• Reduced vibration and component movement

• Safe and reliable load handling

Manufactured to OEM specifications, this nut provides precise thread engagement, correct hardness rating, and long-term durability under heavy-duty operating conditions.

Key Features

• New OEM U-bolt nut

• Designed for suspension and axle mounting

• Compatible with 4HK1 5.2L and 4JJ1 3.0L engines

• Heavy-duty construction for high-load applications

• Corrosion-resistant finish

• Direct replacement for factory hardware

Vehicle Compatibility (2006–2018)

Fits Isuzu Medium-Duty Trucks:

• Isuzu NPR

• Isuzu NPR-HD

• Isuzu NQR

Engines:

• 4HK1 5.2L Diesel

• 4JJ1 3.0L Diesel

Condition: New OEM
Position: Suspension / Axle U-bolt nut

Common Signs You Need a New U-Bolt Nut

• Rusted or corroded hardware

• Stripped or damaged threads

• Loose axle or suspension components

• Clunking noises from rear suspension

• After replacing leaf springs or U-bolts