OEM AZ9114320003
Achieve permanent bolt retention with the AZ9114320003 Lock Plate, a precision‑engineered component designed for SINOTRUK Howo heavy‑duty transmissions, axles, and driveline applications. This genuine lock plate is a cornerstone of our premium Sinotruk howo parts portfolio. The AZ9114320003 is manufactured from high‑strength spring steel, precision‑stamped to exacting tolerances, ensuring reliable locking of critical fasteners under the most extreme vibration and shock loads.
| Parameter | Specification |
|---|---|
| OEM Number | AZ9114320003 |
| Product Name | Lock Plate (Tab Washer) |
| Material | C75S spring steel (DIN 17222) |
| Hardness | 40‑45 HRC |
| Thickness | 1.5 mm |
| Number of Tabs | 4 (outer) / 2 (inner) |
| Hole Diameter | 14.2 mm |
| Weight | 42 g |
| Surface Finish | Zinc‑plated / yellow passivated |
| Compatible Models | Howo A7, T7H, ZZ4257, ZZ1257, HW19710 series |
Manufactured from C75S spring steel, the plate delivers exceptional elasticity and fatigue resistance, ensuring locking tabs maintain their grip over millions of cycles.
Each tab is formed with precision dies, ensuring consistent bend lines and preventing cracking during installation, providing positive mechanical locking.
Once the tabs are bent against bolt heads, the plate creates a positive lock that prevents rotation even under severe vibration, eliminating the need for thread‑lockers.
Every lock plate is checked for dimensional accuracy, tab integrity, and surface finish, guaranteeing zero defects and reliable performance.
This lock plate is a direct replacement for the following SINOTRUK Howo critical fastening positions:
The AZ9114320003 lock plate is a small but critical component that ensures the integrity of bolted joints in SINOTRUK Howo drivelines. It is manufactured from high‑carbon spring steel (C75S), which is first precision‑stamped to create the base plate and integral locking tabs. After stamping, the plate is heat‑treated to achieve a spring hardness of 40‑45 HRC, ensuring the tabs can be bent without cracking and will maintain their locking force over time. Finally, the plate is zinc‑plated for corrosion resistance.
In heavy‑duty applications, bolts are subjected to constant vibration and thermal cycling, which can cause them to loosen. The AZ9114320003 lock plate eliminates this risk. After the bolts are torqued to specification, the integral tabs are bent up against the flats of the bolt heads (or down against a stationary component). This creates a positive mechanical lock that prevents the bolt from rotating, even under extreme vibration or shock loads. Unlike thread‑locking compounds, this method is unaffected by oil, temperature, or age.
Installation of this lock plate requires careful attention. The plate must be positioned correctly so that the tabs align with the bolt heads or designated locking points. Torque the bolts to the specified value in the correct sequence. Then, using a suitable punch or pliers, carefully bend the tabs up against the flats of the bolt heads. The tabs are designed to bend easily without cracking; if a tab cracks during bending, replace the plate. Never reuse a lock plate once the tabs have been bent.
Quality control for the AZ9114320003 includes 100% dimensional inspection using optical comparators. Tab thickness, hole positions, and overall flatness are verified. Samples from each batch are subjected to bend tests to ensure the tabs can be formed without cracking. Hardness is also checked regularly to ensure the heat treatment is consistent. These rigorous checks guarantee that the plate you receive will perform flawlessly.
Environmental sustainability is considered in production. The steel contains a high percentage of recycled content, and all stamping scrap is recycled. The zinc plating process is environmentally controlled with minimal waste. At the end of its long service life, the plate is fully recyclable as steel scrap.
For maintenance departments, the AZ9114320003 lock plate is available individually or in multi‑packs. Each plate is packaged in a protective polybag to prevent corrosion. Bulk orders are shipped in partitioned boxes with clear labeling. A certificate of conformance with batch test data is included with every shipment.
Field feedback from over 150 fleet workshops indicates that using genuine AZ9114320003 lock plates eliminates fastener loosening issues, a common problem with standard washers or inferior aftermarket copies that crack when bent. Technicians report perfect fit and reliable locking every time.
When ordering, always verify the bolt pattern and hole size. The AZ9114320003 is specifically designed for applications with 14.2 mm holes and four outer tabs. For other configurations, consult the SINOTRUK parts catalog. Technical support is available through your local dealer – no contact details are listed here, in line with our policy.
In summary, the AZ9114320003 lock plate is a small but vital component that ensures the integrity of critical bolted joints in your SINOTRUK Howo vehicle. Its robust spring steel construction, precision‑formed tabs, and corrosion‑resistant finish make it the ideal choice for any heavy‑duty application where loosening is not an option.
During service, inspect the AZ9114320003 plate for cracked tabs, corrosion, or signs of bolt loosening. If any tab is broken or missing, replace the plate immediately.
Lock plates are designed for single use only. Once the tabs have been bent, they cannot be relied upon to provide locking force again. Always install a new plate during reassembly.
Only the authentic AZ9114320003 lock plate uses the exact spring steel grade and heat treatment specified by SINOTRUK. Imitations are often made from mild steel that cracks when bent or lacks the springiness to maintain locking force. The genuine plate is 100% inspected and traceable to an ISO 9001 certified facility. Fleet data shows that OEM lock plates reduce fastener‑related failures by 75%.
Preparation: Clean the mating surfaces thoroughly. Ensure the AZ9114320003 plate is oriented correctly with tabs aligned to bolt heads.
Installation: Install bolts and torque to specification. Using a punch, bend the tabs up against the flats of the bolt heads. Ensure the tabs are fully engaged.
After installation, verify that all tabs are securely bent and that no cracks have formed. If any tab cracks, replace the plate.
Positive mechanical locking ensures bolts stay tight even under the most severe vibration.
The spring steel retains its properties from -40°C to +200°C, ensuring reliable locking in all climates.
Steel contains >85% recycled content; 100% of stamping scrap is recycled.
At end of life, the plate is 100% recyclable, supporting a circular economy.
Every AZ9114320003 lock plate is laser marked with the part number for easy identification. When you order from our official distribution channel, you receive the latest production batch with consistent tab geometry and superior corrosion protection.
To verify authenticity, check the smooth zinc finish and the precise part number stamping. Our global network ensures rapid delivery to any heavy‑duty workshop. Trust this lock plate to keep your Howo fasteners secure – it’s the component that makes the difference between a loose bolt and a permanently locked joint.
AZ9114320003 – 100% Genuine SINOTRUK Howo Lock Plate • Built for the long haul • No forms, just quality parts.
