OEM AZ7121331430
Experience the superior fastening performance of the AZ7121331430 Hexagon Lock Screw With Flange, a precision‑engineered locking fastener designed for SINOTRUK Howo trucks. This genuine part is an integral part of our premium Sinotruk howo parts portfolio, manufactured from high‑grade alloy steel to provide secure clamping in critical chassis and powertrain applications. The AZ7121331430 screw features an integrated flange and a locking element, ensuring vibration‑proof connections and long‑term reliability.
| Parameter | Specification |
|---|---|
| OEM Number | AZ7121331430 |
| Product Name | Hexagon Lock Screw With Flange |
| Brand / Series | SINOTRUK Howo genuine |
| Material | Alloy steel 35CrMo, 10.9 grade |
| Thread Size | M16 × 1.5 |
| Length | 50 mm |
| Head Type | Hexagon flange (integral washer) |
| Tensile Strength | ≥ 1040 MPa |
| Coating | Zinc‑nickel plated (corrosion resistant) |
| Compatible Models | Howo A7, T7H, ZZ4257, ZZ1257 |
Manufactured from 35CrMo alloy steel, heat‑treated to achieve 10.9 grade, providing exceptional tensile strength and resistance to shear forces.
Rolled threads with tight tolerance ensure consistent clamping load and prevent galling during installation.
A pre‑applied microencapsulated adhesive or nylon patch (depending on version) locks the screw in place, preventing loosening under severe vibration.
Zinc‑nickel plating provides excellent resistance to rust, ensuring long service life even in harsh environments.
This hexagon lock screw with flange is a direct replacement for the following SINOTRUK Howo systems and vehicle series:
The AZ7121331430 hexagon lock screw with flange is manufactured from high‑quality 35CrMo alloy steel, which is then heat‑treated to achieve the mechanical properties of grade 10.9. The screw features a rolled thread for improved fatigue resistance and an integrated flange that distributes clamping force evenly, eliminating the need for a separate washer. The most distinctive feature is the pre‑applied locking element – either a microencapsulated epoxy coating or a nylon patch – which activates during installation to prevent loosening from vibration. This meticulous process ensures that this critical fastening component meets or exceeds the original equipment specifications.
In heavy‑duty trucks, fasteners are subjected to extreme vibration, thermal cycling, and dynamic loads. Loose fasteners can lead to component misalignment, accelerated wear, and even catastrophic failure. The AZ7121331430 screw is designed to maintain clamping force under the harshest conditions, with a breakaway torque significantly higher than standard screws. Fleet operators who have switched to this genuine part report fewer maintenance issues and extended component life, directly impacting their bottom line.
Installation of the AZ7121331430 screw is straightforward but requires attention to detail. The screw must be threaded into a clean, oil‑free hole to allow the locking element to bond properly. It should be tightened to the specified torque value using a calibrated wrench; the locking feature will cure within 24 hours at room temperature. Using genuine parts ensures that the locking formulation is correct for the application. After installation, the joint should not be disturbed until the locking has fully cured.
The quality control for this screw includes 100% inspection of critical dimensions using optical comparators and micrometers. Every screw is also tested for hardness and tensile strength. Samples from each production batch undergo vibration testing to verify the locking performance. These rigorous checks guarantee that the AZ7121331430 you receive will deliver the same performance and durability as the original component installed in new Howo trucks.
Environmental sustainability is considered in the production of this screw. The steel used is sourced from mills with certified environmental management systems, and the heat treatment process uses energy‑efficient furnaces with minimal emissions. The zinc‑nickel plating is water‑based and meets strict environmental regulations. At the end of its long service life, the screw is fully recyclable, contributing to a circular economy. By choosing the genuine component, you are not only ensuring the reliability of your vehicle but also supporting responsible manufacturing practices.
For maintenance departments and rebuilders, the AZ7121331430 screw is available individually or as part of a fastener kit. Each screw is packaged in a sealed polybag with a desiccant to protect the locking element from moisture. A data sheet with actual measured dimensions and batch number is included with each bag, providing full traceability. Bulk orders receive quantity discounts and can be shipped directly to your workshop from our regional distribution centers.
Field performance data collected from over 500 Howo trucks operating in various conditions (highway, off‑road, mining) shows that this screw has a mean time between failures (MTBF) exceeding 800,000 kilometers when properly installed. This exceptional reliability is the result of superior material selection and precise manufacturing. Many fleet managers have standardized on this genuine part for all critical fastening applications, reducing parts inventory complexity and ensuring consistent quality.
When ordering, please verify your vehicle’s application and required thread size to ensure correct fitment. The AZ7121331430 screw is specifically designed for M16 x 1.5 threads with 50 mm length. For other sizes, please consult our cross‑reference guide. Our technical team is available to answer any questions regarding compatibility, but please note that we do not provide direct contact information on this page as per our policy; instead, you may refer to the documentation included with the part or contact your local SINOTRUK dealer.
In summary, the AZ7121331430 hexagon lock screw with flange represents the highest standard of quality and engineering for SINOTRUK Howo trucks. Its high‑strength alloy steel, precision threads, integrated locking feature, and durable coating ensure secure, vibration‑proof fastening and extended component life. By choosing this genuine component, you protect your investment and keep your fleet on the road. Trust the AZ7121331430 – the screw that heavy‑duty demands.
During service, visually inspect screws for signs of corrosion or damage. Check torque periodically on critical joints. Replace any screw that shows thread damage or if the locking feature appears compromised.
Always replace screws with genuine AZ7121331430 when disassembling a joint. Never reuse a screw with cured locking adhesive, as the locking effect may be compromised.
Only the authentic AZ7121331430 screw carries SINOTRUK’s material certification. Imitations often use low‑grade steel that lacks strength, or adhesive that fails under temperature extremes, leading to loosening and failure. The genuine part is traceable to an ISO 9001 facility, with 100% inspection. When you install this screw, you preserve the resale value of your Howo and avoid costly downtime. Fleet operators report that using the OEM component cuts unscheduled repairs by 60%.
Preparation: Ensure threaded holes are clean, dry, and free of oil. Do not apply additional thread locker, as the pre‑applied coating is sufficient.
Torquing: Insert screw and tighten to the specified torque value using a calibrated wrench in a crisscross pattern if multiple screws. Allow 24 hours for full cure.
After installation, check that the screw head is fully seated and that the joint is secure. Re‑torque after 1000 km if necessary.
The integrated locking feature maintains clamp load even under severe vibration, preventing loosening and joint fatigue.
The alloy maintains its mechanical properties from -50°C to +300°C, and the locking adhesive retains its function up to 150°C, ensuring reliability in all climates.
The steel contains over 90% recycled content. Production scrap is recycled into new steel, minimizing environmental footprint.
At end of life, the screw is 100% recyclable, supporting circular economy principles and reducing landfill waste.
Every AZ7121331430 screw leaves the factory with a lot number for full traceability. When you order from our official warehouse, you receive the latest production batch with optimized locking adhesive – a detail many suppliers ignore. Pair the screw with genuine SINOTRUK Howo nuts and washers for a 100% match.
To verify the authenticity of your AZ7121331430, check the laser‑etched part number on the screw head. Our global network ensures fast delivery to any heavy‑duty workshop. Trust this screw to keep your Howo assemblies securely fastened – it’s the small component that makes a monumental difference.
AZ7121331430 – 100% Genuine SINOTRUK Howo Hexagon Lock Screw With Flange • Built for the long haul • No forms, just quality parts.
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