Mack Semi-Round U Bolt Kits, Grade 8

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Mack Semi-Round U-Bolt Kits – Grade 8

ATS Springs offers high-quality Mack Semi-Round U-Bolt Kits built to meet or exceed OEM specifications. These Grade 8 U-bolts are designed for Mack trucks using trunnion suspension systems, providing durability, proper torque, and reliability.

Key Features:

• Grade 8 construction for superior strength and safety
• Semi-round bend fits Mack trunnion rear suspension
• Includes deep nuts and thick washers for secure installation
• All U-bolts bent in-house from straight rods for precise fit
• Re-use of old U-bolts not recommended due to fatigue and stretching

Mack Trunnion Seats:

• One-piece design with pressed and reamed bronze bushings
• Grease zerk for front-position greasing
• Same quality and durability as Mack dealer parts at a fraction of the cost
• ATS also offers optional internal hardware kits, with or without bushings

Why Upgrade or Replace:
Mack Semi-Round U-Bolts and trunnion seats are critical for safe and reliable suspension operation. Over time, U-bolts can stretch, weaken, or corrode, leading to suspension misalignment, uneven wear, and compromised handling. Upgrading to new Grade 8 components ensures proper suspension performance and extended component life.

ATS Advantage:

• OEM-quality parts at discounted prices
• Kits ready to install for faster, easier repairs
• Expert support available via “Just Ask Bob” or our toll-free number