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Sinotruk AZ9925520268 Spare Parts New U-Shaped Bolt And Leaf Spring for All Sinotruk Heavy Trucks

Sinotruk AZ9925520268 Spare Parts New U-Shaped Bolt And Leaf Spring for All Sinotruk Heavy Trucks

The Part Number AZ9925520268 is an Original Equipment (OE) Rear Leaf Spring U-Bolt manufactured by Sinotruk (China National Heavy Duty Truck Group Co., Ltd.). As a core fastening component in the rear suspension system of heavy commercial vehicles, its primary function is to securely clamp the leaf spring pack onto the rear axle housing, ensuring stable load transfer and reliable chassis dynamics.

Engineered for extreme durability under high-stress conditions, this U-bolt plays a vital role in maintaining vehicle structural integrity, ride stability, and safety during long-haul and heavy-load operations. It is widely used across Sinotruk’s flagship HOWO series and compatible platforms.

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Model:
AZ9925520268
Brand:
Shacman Sinotruk HOWO FAW Dongfeng Foton Auman

Product Description

Attribute	Description
Part Name	Rear Leaf Spring U-Bolt
OEM Part Number	AZ9925520268
Application Position	Rear Axle – Secures Leaf Spring Pack to Axle Seat
Vehicle Compatibility	SINOTRUK HOWO 371, A7, T7H, TX Series; compatible Steyr-based and some SHACMAN models
Function	Clamps leaf spring firmly to axle; maintains alignment under dynamic loads
Design Type	U-shaped bolt with two threaded ends
Installation Method	Used with top plate (bridge plate) and dual nuts
Production Standard	Meets ISO9001 quality management standards
Replacement Type	Direct OEM replacement; no modification required

Parameter	Specification
Thread Size	M24 × 2.0 mm pitch
Total Length (Center-to-Center)	480 mm (±2 mm tolerance)
Leg Diameter	Ø24 mm
Bend Radius	Designed to match standard rear axle spring seat curvature
Material	40Cr alloy steel or high-tensile carbon steel
Tensile Strength	≥ 1,000 MPa (after heat treatment)
Yield Strength	≥ 800 MPa
Surface Treatment	Chrome-plated / Black oxide (ferritic anti-rust coating) / Oil-coated for corrosion resistance
Weight	3.4 kg – 3.9 kg per unit
Heat Treatment	Quenched and tempered for enhanced toughness and fatigue resistance
Compliance Standards	ISO 898-1, GB/T 3098.1 (Chinese national standard for mechanical properties of fasteners)