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The Q40008 Small Washer is a precision-formed hardened steel component designed to distribute clamping loads and protect mating surfaces in critical bolted joints of SINOTRUK Howo heavy-duty trucks. As a premier supplier of genuine Sinotruk howo parts, we offer this small washer as a direct OEM replacement, manufactured to the original equipment’s stringent specifications. The washer features a flat, smooth surface with a precisely sized center hole, providing consistent load spreading, friction control, and long-term durability under the extreme clamping forces, vibration, and harsh environmental conditions typical of heavy-duty trucking.
This small washer (OEM Q40008) is essential for preventing damage to softer materials, reducing the risk of bolt loosening, and ensuring uniform preload distribution in chassis and driveline fastening applications. Its accurate dimensions and high hardness guarantee reliable performance, even after repeated tightening cycles. The Q40008 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 • Hardened steel • Precision flat surface • Corrosion-resistant finish
The Q40008 Small Washer is a flat, hardened steel washer used to distribute the clamping load of a bolt or screw over a larger surface area, protecting the underlying material from damage and preventing loss of preload due to embedding or vibration. Engineered as a direct OEM replacement for SINOTRUK Howo trucks, this washer guarantees correct inner diameter, outer diameter, and thickness to match the original specification. Manufactured to the highest standards, it ensures a precise fit and reliable performance in critical fastening applications.
The washer is produced from high-carbon steel that is heat-treated to achieve a hardness of HRC 38–45, providing excellent resistance to indentation and deformation under load. The surfaces are ground flat and parallel to ensure even load distribution, and the edges are deburred to prevent scoring of mating parts. A protective zinc-plated or phosphate coating is applied to resist corrosion and extend service life. The center hole is precisely sized to provide a close fit with the bolt shank, maintaining concentric alignment during assembly.
This small washer is essential for maintaining the integrity of bolted joints, preventing loosening, and reducing the risk of stress fractures in bolted components. Its robust material properties and precise engineering guarantee reliable performance 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 Q40008 Small Washer is specifically designed for SINOTRUK Howo heavy-duty trucks, including Howo A7, T7H, T5G, and many other models. It is used in a wide variety of bolted connections, including engine mounts, transmission mounts, suspension links, brake caliper brackets, crossmember attachments, and many other chassis applications that utilize M8 bolts. Its compact size and standard dimensions make it a versatile and essential fastener component.
This washer is suitable for a wide range of operating environments, including long-haul trucking, regional distribution, construction, mining, and agricultural operations. Its hardened steel construction and corrosion-resistant finish ensure reliable load distribution even under sustained heavy loads, high vibration, and extreme ambient conditions.
When replacing, always verify the inner diameter to match the bolt size (M8) and the outer diameter and thickness to ensure proper joint design. The Q40008 is a direct-fit component that simplifies maintenance and restores original fastener integrity.
Installing the Q40008 Small Washer is straightforward but requires attention to proper orientation and torque. Place the washer under the bolt head (or nut) with the flat side against the bearing surface. Ensure the washer sits flush against the joint material and is centered on the bolt hole. For critical joints, use the washer in combination with a suitable bolt and nut to achieve the specified preload.
Tighten the bolt or nut to the torque value specified in the service manual using a calibrated torque wrench. The presence of the washer helps to achieve a more consistent torque-tension relationship by reducing friction variations and protecting the joint surface. For applications with high vibration, consider using a thread-locking compound on the bolt threads, but ensure the washer remains free to rotate during tightening to avoid false torque readings.
Regular maintenance includes periodic inspection of the washer for signs of corrosion, deformation, or cracking. If the washer shows any damage or significant rust, replace it during routine service. Washers that have been subjected to multiple tightening cycles or high clamp loads may also require replacement to ensure continued load distribution. Always use a new washer when reassembling critical joints to ensure optimal performance.
This washer is engineered for long service life, but proper installation and periodic inspection ensure continued joint integrity and safety.
This small washer 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, hardness, and tensile strength to ensure it meets the required grade. The stamping and heat-treatment processes are carefully controlled to achieve the correct hardness and dimensional accuracy.
Every washer undergoes 100% dimensional inspection, including inner diameter, outer diameter, thickness, and flatness verification. We also perform hardness testing on random samples to confirm HRC 38–45. The zinc plating thickness is measured and salt spray tested per ASTM B117 to ensure corrosion resistance. The washers are cleaned, deburred, and carefully packaged to prevent damage during transportation.
Our commitment to quality ensures a washer that provides consistent load distribution, reduces joint relaxation, and extends the life of bolted assemblies. Backed by a comprehensive warranty, this washer offers peace of mind for fleet operators and owner-operators.
Choose genuine quality for your fastening needs – choose the Q40008 OEM small washer.
The Q40008 Small Washer is a simple yet indispensable component that ensures the reliability and longevity of bolted joints throughout your SINOTRUK Howo. Its hardened steel construction, precision flatness, and corrosion-resistant finish guarantee that clamping loads are evenly distributed, protecting both the fastener and the joint material from damage. It is the genuine solution you need.
By choosing this genuine OEM-quality washer, you avoid the risks of joint failure, bolt loosening, and material embedment that can occur with inferior aftermarket washers. It is engineered for long-lasting performance, ensuring that every bolted connection maintains its preload over time. The Q40008 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 washer is the dependable choice for professionals who demand the best.
Invest in this OEM small washer 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 Q40008 sets the standard for washers in heavy-duty trucks.
Order your Q40008 Small Washer today and ensure every bolted connection in your SINOTRUK Howo remains secure and reliable for miles to come.
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