I. Core Product Identification and Positioning

Model Specifications: AZ9112550213 (Original Factory Standard Model)

Product Name: Fuel Tank Cap Assembly

Core Attributes: Key protective component for heavy-duty truck fuel systems, certified by ISO/TS 16949 automotive industry quality standards, original factory-grade quality, specifically designed for long-distance commercial vehicle transportation and complex road conditions, ensuring fuel safety and preventing leaks and pollution. "The First Line of Defense," precisely adapted to Sinotruk's mainstream heavy-duty truck models.

II. Core Functions and System Value

As a crucial protective component of the fuel system, this fuel tank cap assembly undertakes three core safety missions, directly impacting fuel storage safety and operating costs:

Anti-theft Security: The metal lock cylinder structure paired with a dedicated key forms double anti-theft protection, effectively eliminating the risk of fuel theft, reducing property losses during transportation, and suitable for long-distance logistics, outdoor parking, and other scenarios;

Sealing Protection: Built-in high-precision sealing rings achieve all-around sealing of the fuel tank opening, preventing fuel evaporation and leakage (leakage ≤0.01g/h), and blocking dust, moisture, and impurities from entering the fuel tank, avoiding engine injector wear, fuel line blockage, and other malfunctions caused by fuel contamination;

Brand Compliance and Adaptation: The outer cover is printed with the original Sinotruk brand logo, meeting the vehicle compliance requirements. The standardized design ensures precise matching with the fuel tank opening, avoiding safety hazards caused by incompatible parts and guaranteeing normal vehicle operation.

III. Structural Design and Performance Advantages

1. Metal Lock Cylinder Structure: The Core Guarantee of Anti-theft and Durability

The metal lock cylinder, formed from high-quality cold-rolled steel plate and combined with a precision locking mechanism, has three core advantages compared to plastic lock cylinders:

Superior Anti-theft Performance: The lock cylinder uses a multi-tooth interlocking structure, providing strong anti-pry and anti-drilling capabilities. The key cross-opening rate is ≤0.01%, far exceeding industry standards, effectively resisting malicious fuel theft;

Reliable Structural Strength: The lock cylinder has a tensile strength of over 380MPa, capable of withstanding external impacts and prying damage without deformation or breakage risk, and a service life ≥5000 hours. Secondary switch operation;

Practical and convenient accessories: Equipped with two original custom keys, the key teeth have a unique shape, making it easy for the driver to keep and manage them. At the same time, the lock cylinder rotates smoothly, and the switching resistance is ≤5N, making operation effortless.

2. Built-in sealing ring: The core of precise sealing protection

Equipped with customized nitrile rubber (NBR) seals.The rubber ring, treated with a high-temperature vulcanization process, balances sealing performance and durability:

Excellent sealing performance: The rubber ring adopts a lip seal design, fitting tightly to the fuel tank opening. Within a temperature range of -30℃ to 80℃, the sealing pressure remains ≥0.05MPa, preventing fuel leakage and evaporation;

Oil-resistant and anti-aging: The nitrile rubber material possesses excellent resistance to fuel corrosion. Long-term contact with diesel, gasoline, and other fuels does not cause swelling or cracking, and the sealing life is ≥3 years;

Thorough impurity blocking: The smooth surface of the rubber ring completely blocks dust and rainwater from entering the fuel tank after application, preventing fuel deterioration and ensuring the cleanliness of the engine's fuel supply system.

3. Gray plastic outer cover: A design that combines practicality and brand appeal

The outer cover uses an enhanced design..." Made of PP (polypropylene) plastic through injection molding, combined with branded design, achieving dual value of function and branding:

High material durability: With added glass fiber reinforcement, the impact strength reaches over 15kJ/m², capable of withstanding stone impacts from heavy trucks and daily switch wear, without risk of breakage or fading;

Wide environmental adaptability: Outstanding high and low temperature resistance, able to work stably in environments ranging from -40℃ to 85℃, avoiding embrittlement or deformation caused by extreme weather;

Clear Brand Identification: The outer cover surface is embossed with the original Sinotruk brand logo, with clear and wear-resistant lettering, highlighting its original part status and making it easy for users to identify genuine products. The gray color scheme also coordinates well with the overall vehicle appearance.

IV. Precisely Matched Vehicle Models and Application Scenarios

Matched Vehicle Models (Covering Sinotruk Mainstream Platforms):

Sinotruk Howo Series: Howo T7H, Howo TH7, Howo T5G, Howo N7W

Sinotruk Sinotruk Shandeka Series: Shandeka C7H, Shandeka C9H, Shandeka G7S

Sinotruk Howohan Series: Howohan J7G, Howohan N7G, Howohan J7B, Howohan N5G

Other Compatibility: Heavy-duty vehicles conforming to Sinotruk's original fuel tank opening specifications (original size matching)

Applicable Scenarios:

Designed specifically for heavy-duty scenarios such as long-distance logistics, engineering construction, mining operations, and cold chain transportation, it can work stably in complex road conditions, outdoor parking, and extreme temperature and humidity environments, effectively preventing fuel theft, leakage, and pollution. It is a core protective component for ensuring the safety of heavy-duty truck fuel systems and reducing maintenance costs, providing reliable support for efficient vehicle operation.