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High-quality, Brand New Truck Parts Dongfeng Truck 12.9 Engine Wheel Bolt 31ZB1-03051

The 31ZB1-03051 Front Wheel Hub Bolt Assembly is a high-strength fastening system manufactured by Dongfeng Commercial Vehicles (DFCV) in cooperation with Dongfeng Dana Axle Co., Ltd. This assembly serves as the critical connection between the front wheel rim, brake drum, and hub, ensuring secure attachment under extreme operational conditions such as heavy loads, high-speed travel, and rough terrain.

Designed for use on 7-ton to 9-ton class front steering axles, including models like 435, 460, and VGD series, this bolt set plays a vital role in maintaining vehicle safety, structural integrity, and driving stability. The 31ZB1-03051 is typically included in complete hub assemblies such as 3103011-T1311, and is widely used across premium DFCV platforms including Tianlong KL/KX/GX, Dasuri KC, and Kingrun KR series trucks.

Made from ultra-high-strength alloy steel (Grade 12.9) and treated with anti-corrosion coatings such as phosphating or Dacromet, this assembly offers exceptional resistance to fatigue, vibration loosening, and environmental degradation—making it ideal for long-haul freight, construction, and cross-border transport applications in 2026 and beyond.
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  • 31ZB1-03051

  • Dongfeng

Attribute Specification
Part Number 31ZB1-03051
Product Name Front Wheel Hub Bolt Assembly (with Nuts)
Function Secures front wheel rim to hub and brake drum
Installation Position Front axle hub (left/right side), dual-wheel configuration
Vehicle Type Heavy-Duty Trucks, Tractors, Dump Trucks, Mixers
Axle Compatibility Dongfeng Dana 435, 460, VGD71, VGD75, VGD90 Series
Material Grade Alloy Steel – Grade 12.9 (highest commercial strength)
Surface Treatment Phosphated or Dacromet Coating (anti-rust & corrosion resistant)
Thread Size M22 × 1.5 mm (standard)
Number per Wheel Typically 10 bolts per front hub
OEM Manufacturer Dongfeng Commercial Vehicle / Dongfeng Dana Joint Venture
Standards Compliance GB/T 3098.1, ISO 898-1, QC/T 290–2013
轮毂螺栓-4


轮毂螺栓-2


Parameter Specification
Tensile Strength ≥ 1,220 MPa
Yield Strength ≥ 1,100 MPa
Hardness HRC 39–44
Torque Specification 550–650 N·m (must use calibrated torque wrench)
Length (L) Model-specific (~140–160 mm; varies by hub design)
Weight (Per Bolt + Nut) ~0.58 kg – 0.62 kg
Operating Temperature Range -40°C to +150°C
Fatigue Life ≥ 1 million load cycles
Corrosion Resistance > 500 hours salt spray test (Dacromet-coated version)
Friction Coefficient (Dry) μ ≈ 0.10–0.14 (clean, unlubricated threads)
Design Load Capacity Supports up to 9-ton front axle applications


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