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The rear wheel bolts are critical fasteners that secure the wheels to the hub, ensuring safe and reliable operation under the heaviest loads. The genuine SINOTRUK HOWO AZ7121340130 Rear Wheel Bolts are OEM‑grade components manufactured to exacting tolerances for a perfect fit and lasting durability. As a critical element of the trusted Sinotruk howo parts family, these bolts guarantee a secure wheel attachment, superior tensile strength, and long‑term reliability. Made from high‑strength alloy steel with a corrosion‑resistant finish, the AZ7121340130 bolts withstand extreme loads, vibrations, and harsh environments in mining, construction, and long‑haul applications.
Rear Wheel Bolts
Болты заднего колеса
Pernos de rueda trasera
The AZ7121340130 rear wheel bolts are forged from high‑grade 10.9 alloy steel, providing exceptional tensile strength and resistance to shearing forces. Each bolt is heat‑treated and quenched to achieve consistent hardness throughout, preventing stretching or failure under heavy loads. The threads are rolled after heat treatment for superior fatigue resistance, ensuring the bolts maintain clamping force even after millions of stress cycles.
The bolts feature a precision‑rolled thread profile that meets ISO and DIN standards, guaranteeing a perfect fit with the wheel nuts and hub threads. The thread pitch is optimized for heavy‑duty applications, providing secure engagement while minimizing the risk of cross‑threading. The bolt head is designed with a 22mm hex (or as per OEM) for use with standard impact sockets, and includes an integral flange that distributes clamping load evenly across the wheel mounting surface.
A multi‑layer anti‑corrosion coating, including zinc‑plating and a clear chromate seal, protects the AZ7121340130 bolts from rust caused by road salt, moisture, and chemicals. This finish has been tested to withstand over 500 hours of salt spray, ensuring the hardware remains serviceable even after years of exposure. The bolts are supplied in sets with the correct quantity for a complete rear axle, ensuring you have all the fasteners needed for a professional installation.
The table below provides detailed technical specifications for the genuine SINOTRUK HOWO AZ7121340130 Rear Wheel Bolts. This data is essential for verifying compatibility and performance characteristics.
| Parameter | Specification | Details |
|---|---|---|
| OEM Part Number | AZ7121340130 | SINOTRUK HOWO Original Code |
| Product Name | Rear Wheel Bolts | Set for one rear wheel (quantity as required) |
| Material | Alloy steel, grade 10.9 | Tensile strength ≥ 1040 MPa |
| Thread Size | M22 x 1.5 | Fine pitch for heavy‑duty applications |
| Bolt Length (under head) | 70 mm | Accommodates standard dual wheel setup |
| Head Type | Hex flange, 32 mm across flats | Integral washer face |
| Finish | Zinc‑plated + yellow chromate | >500 h salt spray resistance |
| Torque Specification (dry) | 600 – 650 N·m | Use calibrated torque wrench |
| Torque Specification (lubricated) | 500 – 550 N·m | Reduce by 15% if oiled |
| Quantity per wheel | 10 bolts (typical for dual wheels) | Confirm with vehicle specs |
| Compatible Models | HOWO 6×4, 8×4, Tractor, Dump (select years) | Verify with axle type |
Correct installation of the AZ7121340130 rear wheel bolts is critical for safety and wheel retention. Begin by safely lifting the vehicle and supporting it on jack stands. Remove the wheel nuts and the wheel assembly. Clean the hub mounting surface and the bolt holes thoroughly, removing any rust, dirt, or old thread locker. Inspect the hub threads for damage; if any are damaged, they must be repaired before proceeding.
Apply a light coat of anti‑seize compound to the bolt threads (if specified) or leave them dry as per manufacturer recommendation. Insert the new AZ7121340130 bolts through the wheel and hub, then thread them into the hub by hand to avoid cross‑threading. Use a torque wrench to tighten the bolts in a crisscross star pattern to the specified torque. Recheck the torque after 100 km of driving to account for settling. The AZ7121340130 bolts are a direct OEM replacement for SINOTRUK HOWO vehicles; always verify compatibility with your axle model and wheel type.
Always replace wheel bolts in complete sets for a given wheel position. Never mix old and new bolts. After installation, mark the bolt heads and wheel with a torque stripe to easily detect loosening during visual inspections.
Grade 10.9 material and precision manufacturing guarantee that the AZ7121340130 bolts will not fail under extreme loads. Proper clamping force prevents wheel separation, ensuring the safety of the driver and others on the road.
The high‑quality alloy steel and corrosion‑resistant coating ensure that the bolts remain in serviceable condition for years, even in corrosive environments. This reduces maintenance frequency and replacement costs.
Precision‑rolled threads and controlled friction characteristics allow the bolts to maintain their clamping force over time, reducing the need for frequent retorquing and minimizing the risk of loosening.
By using genuine OEM bolts, you avoid premature wear of wheel hubs and rims caused by loose or mismatched fasteners. Fewer repairs and longer component life directly improve your bottom line.
Wheel bolts are subjected to extreme cyclic loads and should be inspected regularly. Common indicators that the AZ7121340130 bolts need replacement include visible rust or corrosion pitting, stretched or deformed threads, reduced bolt length (indicating plastic deformation), and difficulty in achieving proper torque. If the bolts have been over‑torqued or subjected to a wheel-off event, they must be replaced immediately, even if they appear undamaged, as internal fatigue may have occurred.
Ignoring worn or damaged wheel bolts can lead to wheel loosening, vibration, and potentially catastrophic wheel separation. Replacing them promptly with genuine AZ7121340130 bolts restores safe wheel attachment and ensures compliance with safety regulations. Always replace all bolts on a wheel at the same time, even if only one appears damaged, to maintain uniform clamping.
To maximize the life of your AZ7121340130 rear wheel bolts, perform regular visual inspections during tire rotations or routine maintenance. Check for any signs of corrosion, rust streaks (indicating movement), or loose bolts. Re‑torque the bolts after the first 100 km following installation, and then at every tire service interval. Keep the bolt threads and hub threads clean and lightly lubricated with anti‑seize if specified by the manufacturer.
When using impact wrenches, always final‑torque with a calibrated torque wrench to avoid over‑tightening. Avoid using worn or damaged sockets that could round the bolt heads. If the truck operates in severe conditions (e.g., frequent off‑road, salted roads), consider inspecting the bolts more frequently. Following these practices will help your AZ7121340130 bolts provide reliable service for hundreds of thousands of kilometers.
Generic aftermarket wheel bolts often use lower‑grade steel, incorrect thread pitch, and inadequate coatings, leading to thread stripping, bolt failure, and corrosion. The genuine SINOTRUK HOWO AZ7121340130 rear wheel bolts are engineered to the exact specifications of your truck’s axle and wheel system, ensuring correct fit, clamping force, and durability. They are manufactured under strict quality controls using the same materials and processes as the original parts fitted at the factory.
By choosing the authentic AZ7121340130, you protect your investment, ensure vehicle safety, and maintain warranty compliance. For fleet managers and owner‑operators who demand the best, the genuine AZ7121340130 is the only responsible choice for keeping your HOWO’s wheels securely attached.
The AZ7121340130 Rear Wheel Bolts are part of SINOTRUK’s comprehensive line of genuine chassis fasteners. Whether you operate in extreme cold, desert heat, or humid coastal environments, these bolts deliver dependable performance. Their robust construction resists corrosion and fatigue, providing peace of mind for every journey. Always insist on genuine parts to keep your HOWO running at its best.
For workshops and service centers, stocking the genuine AZ7121340130 ensures that every wheel service meets the highest standards. Customers will appreciate the secure fit, easy installation, and long service life. With the AZ7121340130, you are not just replacing fasteners—you are reinforcing the safety and reliability of the entire vehicle.
Remember, the bolts that hold your wheels on are the last line of defense against catastrophic failure. Using genuine SINOTRUK HOWO parts like the AZ7121340130 is an investment in safety, compliance, and operational efficiency. Trust the original, trust the AZ7121340130.
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