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The Q340B12 Type I Hex Head Nut is a precision-formed, high-strength fastener used in critical bolted connections throughout the chassis and driveline of SINOTRUK Howo heavy-duty trucks. As a premier supplier of genuine Sinotruk howo parts, we offer this hex nut as a direct OEM replacement, manufactured to the original equipment’s stringent specifications. The nut features a standard hex profile with precisely controlled thread dimensions, providing reliable clamp load, excellent fatigue resistance, and long-term durability under the extreme loads, vibration, and harsh environmental conditions typical of heavy-duty trucking.
This hex head nut (OEM Q340B12) is essential for securing critical chassis components, including frame crossmembers, suspension links, brake brackets, and engine mounts. Its consistent thread fit and high-strength material ensure secure fastening and resistance to loosening. The Q340B12 is built to endure the rigors of long-haul transport, off-road operations, and severe environmental exposure, delivering dependable service over thousands of miles.
OEM direct replacement • Grade 10 steel • Precision rolled threads • Corrosion-resistant finish
The Q340B12 Type I Hex Head Nut is a standard metric hex nut used to secure bolts and threaded studs in a multitude of chassis and powertrain applications on SINOTRUK Howo trucks. Engineered as a direct OEM replacement, this nut guarantees correct thread fit, consistent clamp load, and reliable retention under dynamic loading. Manufactured to the original specifications, it ensures a seamless fit and robust performance.
The nut is produced from high-quality carbon steel, grade 10 or equivalent, providing excellent tensile strength and resistance to stripping. The threads are formed using a precision rolling process that work-hardens the thread flanks, enhancing fatigue resistance and improving surface finish for consistent torque-tension characteristics. The hex profile is precisely formed to ensure proper engagement with standard wrenches or sockets, minimizing the risk of rounding during installation or removal.
This hex nut is essential for maintaining the integrity of bolted joints, preventing loosening and joint separation that can lead to component wear, noise, or failure. Its robust material properties and precise engineering guarantee reliable clamping over extended service intervals, meeting the rigorous demands of heavy-duty trucking. It is the direct replacement you can trust to keep your SINOTRUK Howo securely fastened.
The Q340B12 Type I Hex Head Nut is specifically designed for SINOTRUK Howo heavy-duty trucks, including Howo A7, T7H, T5G, and many other models. It is commonly used with M12 bolts to secure chassis crossmembers, suspension brackets, brake calipers, engine mounts, and numerous other bolted joints. Its standard M12×1.75 thread size makes it a versatile and essential fastener for a wide range of applications.
This nut is ideal for a wide range of operating environments, including long-haul trucking, regional distribution, construction, mining, and agricultural operations. Its high-strength material and corrosion-resistant finish ensure reliable fastening even under sustained heavy loads, high vibration, and extreme ambient conditions.
When replacing, always verify the thread size and pitch to ensure a perfect match. The Q340B12 is a direct-fit component that simplifies maintenance and restores original joint integrity.
Installing the Q340B12 Type I Hex Head Nut requires proper torque control and the correct wrench size (18 mm). Begin by inspecting the nut for any visible damage or corrosion before installation. Ensure the mating bolt threads are clean and free of dirt, rust, or old thread-locking compound. Apply a light coat of clean engine oil or anti-seize to the threads if recommended by the service manual.
Thread the nut onto the bolt by hand to ensure it turns freely. Use a calibrated torque wrench to tighten the nut to the torque value specified in the service manual. For M12 grade 10 nuts, the typical torque range is 80–100 N·m, depending on the joint friction conditions. When tightening, hold the bolt head securely to prevent spinning. For critical joints, consider using a thread-locking compound to prevent loosening under vibration.
After installation, double-check the torque after the first 100 miles of operation to account for any initial settling. Regular maintenance includes periodic inspection of the nut for signs of corrosion, thread damage, or loss of tension. If the nut shows any signs of stretching, corrosion, or damage during routine service, replace it immediately. Nuts that have been torqued multiple times may also lose their clamping ability; replacement is recommended if they show any sign of fatigue.
This nut is engineered for long service life, but proper installation and torque management are essential for maintaining joint integrity and safety.
This hex nut is manufactured in an ISO 9001-certified facility using high-quality carbon steel sourced from approved mills. The raw material is tested for chemical composition, tensile strength, and hardness to ensure compliance with grade 10 requirements. The nut is produced through a controlled cold-forming and thread-rolling process that maintains precise dimensional tolerances and surface quality.
Every nut undergoes 100% dimensional inspection, including thread gauging, hex width measurement, and height verification. We also perform hardness testing, proof load testing, and torque-tension correlation tests on random samples from each production batch. The zinc plating thickness is measured and salt spray tested to ensure it meets the specified corrosion resistance requirements. The nuts are carefully packaged to prevent damage and contamination during shipping.
Our commitment to quality ensures a nut that delivers reliable, long-lasting clamping, protecting your truck from joint loosening and structural failure. Backed by a comprehensive warranty, this nut offers peace of mind for fleet operators and owner-operators.
Choose genuine quality for your fastening needs – choose the Q340B12 OEM hex head nut.
The Q340B12 Type I Hex Head Nut may appear simple, but it is essential for maintaining the structural integrity and safety of your SINOTRUK Howo. Its high-strength material, precision rolled threads, and corrosion-resistant finish ensure that every bolted joint remains secure, reducing the risk of loosening, component wear, or catastrophic failure. It is the genuine solution you need.
By choosing this genuine OEM-quality nut, you avoid the risks of thread damage, corrosion, or stripping that can occur with substandard aftermarket fasteners. It is engineered for long-lasting performance, ensuring that every bolted connection stays tight under the most demanding conditions. The Q340B12 delivers the reliability you expect from a genuine SINOTRUK Howo component.
Fleet operators will benefit from reduced maintenance costs, fewer fastener-related issues, and improved vehicle safety. Owner-operators will gain confidence in their truck’s ability to handle heavy loads and rough roads without compromising joint integrity. This nut is the dependable choice for professionals who demand the best.
Invest in this OEM hex nut and experience the difference that genuine quality makes. Its proven reliability and engineering excellence make it the smart choice for anyone who values performance and durability. The Q340B12 sets the standard for hex nuts in heavy-duty trucks.
Order your Q340B12 Type I Hex Head Nut today and ensure every bolted connection in your SINOTRUK Howo remains securely fastened for miles to come.
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