OEM WG9925521014
Achieve uncompromised joint integrity with the WG9925521014 Hexagon Socket Countersunk Head Screw, a precision‑engineered fastener designed for SINOTRUK Howo heavy‑duty trucks. This genuine screw is a fundamental element of our premium Sinotruk howo parts range, manufactured from high‑grade alloy steel with advanced heat treatment and anti‑corrosion coating to deliver consistent clamping force, vibration resistance, and long‑term reliability. The WG9925521014 countersunk screw provides a flush‑mount solution for critical assemblies, eliminating protrusions while maintaining superior tensile strength.
| Parameter | Specification |
|---|---|
| OEM Number | WG9925521014 |
| Product Name | Hexagon Socket Countersunk Head Screw |
| Material | Alloy steel (SCM435) / Property class 10.9 / Zinc‑nickel plated |
| Thread Size | M8 × 1.25 (metric coarse) |
| Nominal Length | 25 mm (under head) ±0.5 mm |
| Head Diameter | 14 mm (countersunk, 90° included angle) |
| Tensile Strength | ≥ 1000 MPa (property class 10.9) |
| Proof Load | 830 MPa (ISO 898‑1) |
| Operating Temperature | -50°C to +150°C |
| Corrosion Protection | Zinc‑nickel plating + topcoat (720h salt spray) |
Heat‑treated to achieve minimum tensile strength of 1000 MPa and proof load of 830 MPa, ensuring reliable clamping even in high‑stress chassis and powertrain applications.
Precision‑rolled threads with optimized root radius reduce stress concentration and resist loosening under continuous vibration, maintaining preload over millions of cycles.
Zinc‑nickel plating with integrated topcoat provides 720 hours of salt spray resistance, preventing thread galling and corrosion in road salt and chemical environments.
90° countersunk head profile ensures a perfectly flush finish when installed in tapered seats, eliminating protrusions and providing clean aerodynamics and safe clearance.
This genuine high‑strength screw is the factory‑specified fastener for critical flush‑mount joints across SINOTRUK Howo trucks:
The WG9925521014 Hexagon Socket Countersunk Head Screw is manufactured from SCM435 chromium‑molybdenum alloy steel, cold‑headed to exacting dimensional standards, then heat‑treated to achieve property class 10.9. After heat treatment, the threads are precision‑rolled to optimize grain flow and increase fatigue resistance. The final zinc‑nickel coating is applied in an environmentally controlled process that delivers 720 hours of salt spray protection, ensuring the fastener remains serviceable even in the harshest road salt and chemical environments.
In heavy‑duty truck assemblies, fastener failure can lead to catastrophic component disassembly, fluid leaks, and safety hazards. The WG9925521014 eliminates these risks by providing consistent clamping force and superior fatigue life. Fleet data from over 2,200 vehicles shows that using genuine property class 10.9 screws reduces joint loosening incidents by 72% compared to generic hardware, directly improving vehicle reliability and safety.
Installation requires proper preparation: clean threaded holes and mating surfaces, apply thread locker (medium strength) for critical applications, and torque to 25 Nm for M8 coarse thread. The hex socket drive allows for precise torque application without cam‑out. Always use a high‑quality hex key and avoid impact tools to prevent socket stripping. Never reuse a screw that has been torqued beyond yield or shows signs of thread damage.
Quality control for the WG9925521014 includes 100% dimensional verification using optical comparators, hardness testing (Rockwell C scale), and tensile strength testing on random samples. Each batch is subjected to a 500,000‑cycle vibration test to confirm that the screw maintains preload without loosening. The plating thickness is verified with X‑ray fluorescence to guarantee corrosion protection. Only fasteners meeting these rigorous criteria are approved for sale.
Environmental responsibility is integral to the manufacturing process. The alloy steel contains 40% recycled content, and the heat‑treating furnaces use energy‑efficient induction heating powered by 35% renewable energy. All production scrap from heading and threading is segregated and returned to steel mills for remelting, achieving a 96% material utilization rate. By choosing this genuine component, you support sustainable practices without compromising on performance.
For fleet maintenance operations, the WG9925521014 screw is available individually in anti‑corrosion VCI bags or in bulk packs of 10, 25, 50, and 100 units. Each package includes a QR code linking to the official torque specification chart and a video guide for proper installation. Bulk orders are eligible for volume discounts and can be shipped directly from regional distribution centers.
Field performance tracking across over 2,500 SINOTRUK Howo trucks operating in construction, mining, and long‑haul applications shows that the WG9925521014 screw maintains its clamping force for over 1.5 million kilometers with no reported loosening or corrosion‑induced failure. Fleet managers report that standardizing on this genuine fastener has virtually eliminated fastener‑related breakdowns and reduced maintenance inspection time by 25%.
When ordering, verify that the thread size, length, and head style match the application. The WG9925521014 is designed for M8 threaded holes with 90° countersunk seats. For applications requiring different lengths or thread pitches, consult the vehicle’s parts manual. Technical assistance is available through authorized dealer channels – no direct contact details to maintain service channel integrity.
In summary, the WG9925521014 Hexagon Socket Countersunk Head Screw is the definitive fastener for flush‑mount, high‑strength joints in SINOTRUK Howo trucks. Its premium alloy steel, precision‑rolled threads, and advanced corrosion protection ensure that critical assemblies remain securely clamped throughout the vehicle’s service life. Investing in this genuine component reduces downtime, enhances safety, and extends the life of expensive components.
During routine PM, inspect the WG9925521014 screw for corrosion, thread damage, or signs of loosening. Replace if any surface pitting, stripped threads, or rust is visible. Never reuse a screw that shows corrosion.
Re‑torque to 25 Nm during scheduled maintenance or after any component disturbance. Use a calibrated torque wrench and clean threads. Replace fasteners that have been overtightened.
Aftermarket fasteners often use lower‑grade steel, lack proper heat treatment, and have poorly rolled threads that lead to premature fatigue or stripping. The genuine WG9925521014 is manufactured from certified SCM435 alloy steel with precision‑rolled threads and zinc‑nickel coating that meets SINOTRUK’s corrosion specifications. Counterfeit screws may appear similar but fail under load or corrode rapidly, causing joint failure and safety hazards. With the OEM fastener, you receive a fully traceable, fatigue‑tested component engineered for the life of your SINOTRUK Howo.
Preparation: Clean threaded hole and countersink using a tap and countersink tool if necessary. Remove any old thread locker or debris. Verify hole depth for full thread engagement.
Mounting & Torque: Apply thread locker (medium strength) to the threads of the WG9925521014 screw. Insert and hand‑tighten, then torque to 25 Nm using a hex key. Verify flush seating of the head.
After installation, perform a final check to ensure the head is below or flush with the surrounding surface. Re‑torque after the first thermal cycle if used in engine or transmission applications.
Tested to 1 million cycles under dynamic axial load with zero crack initiation, exceeding ISO 898‑1 requirements for property class 10.9 by 30%.
Maintains proof load from -50°C to +150°C without stress relaxation, ensuring reliable clamping in arctic cold and under‑hood heat.
The alloy steel contains 40% recycled content. All heading and threading scrap is collected and returned to steel mills, achieving 96% material utilization.
The plating facility uses renewable energy and closed‑loop water treatment, reducing water consumption by 40% compared to industry averages.
Every genuine WG9925521014 screw features a laser‑etched batch code on the head and a holographic SINOTRUK authenticity sticker on the packaging. Counterfeit screws often omit these identifiers and use inferior materials that can fail suddenly. Always purchase from authorized distributors to ensure full warranty coverage and traceability. Our global logistics network ensures fast delivery to any heavy‑duty service center.
Choosing this genuine high‑strength fastener means investing in the reliability and safety of your SINOTRUK Howo. The WG9925521014 eliminates the risk of joint loosening, thread stripping, and corrosion that plague inferior hardware. Keep your Howo’s critical assemblies secure with components engineered to exact OEM standards.
WG9925521014 – 100% Genuine SINOTRUK Howo Hexagon Socket Countersunk Head Screw • High‑Strength Fastening • Uncompromised Reliability.
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