The WG9000361009 nut seat is a fundamental component for securing and sealing tube connections in heavy‑duty trucks. Its primary function is to provide a stable, precision‑machined surface for the tube nut to clamp against, ensuring a tight, leak‑proof seal between tube ends and mating fittings. This is especially crucial in air brake systems, where any leakage can compromise braking performance, and in fuel systems, where even minor seepage can lead to efficiency loss or safety hazards. The NG12 designator refers to the nominal size (12 mm), ensuring compatibility with standard metric tube fittings. By using the genuine WG9000361009, you guarantee a perfect fit and optimal sealing, eliminating the risk of misalignment or inadequate clamping that can cause premature failure.
Leak‑Proof Sealing
Precision‑machined seating surface ensures a tight, durable seal that withstands high pressure and vibration.
Precision NG12 Fit
Designed for 12 mm tube connections, providing a stable and accurate seating surface for the nut.
Corrosion‑Resistant Build
High‑grade brass with nickel plating offers exceptional resistance to rust, chemicals, and road salts.
OEM‑Exact Fit
Manufactured to Sinotruk’s original specifications – direct replacement with no modifications.
| Parameter | Specification |
|---|---|
| OEM Number | WG9000361009 |
| Product Name | Nut Seat NG12 |
| Brand | HOWO / Sinotruk |
| Nominal Size | NG12 (12 mm) |
| Thread Size | M14 x 1.5 (metric fine) |
| Material | Brass (CW614N) with nickel plating |
| Operating Temperature | -40°C to +120°C |
| Max. Working Pressure | 20 bar (pneumatic) / 10 bar (hydraulic) |
| Quality Standard | Original Sinotruk / HOWO OEM specification |
The WG9000361009 nut seat is extensively used across the HOWO and Sitrak model ranges, particularly in systems that require secure and stable seating for tube connections. Typical applications include:
The WG9000361009 nut seat is manufactured with uncompromising quality, ensuring it outperforms generic aftermarket alternatives. Made from premium brass billet and CNC‑machined to exacting tolerances, every seating surface and thread is flawlessly formed. The nickel‑plated finish provides a hard, corrosion‑resistant layer that resists rust, chemicals, and road salts, ensuring long‑term durability. The precision‑machined seating surface is optimised to provide a stable, even clamping force for the tube nut, preventing galling or seizing. Each nut seat is inspected for dimensional accuracy and surface finish to guarantee perfect compatibility with mating components. This dedication to quality delivers reliable, maintenance‑free operation, reducing downtime and extending the service life of your vehicle’s fluid systems.
CNC Precision
Seating surfaces and threads machined to micron accuracy for perfect sealing and fit.
Corrosion Protection
Nickel plating offers robust resistance to rust, moisture, and harsh chemicals.
Genuine OEM Quality
Built to Sinotruk’s original specifications – guaranteed fit, form, and function.
100% Dimensional Inspection
Every nut seat verified against OEM drawings for perfect compatibility.
Installing the WG9000361009 nut seat is straightforward, but correct technique ensures a leak‑free and durable connection. Clean the seating area and threads of the mating components thoroughly, removing any debris or old sealant. Place the nut seat into the fitting or port, ensuring it is properly aligned and seated. Slide the tube nut over the tube end, then thread it onto the mating fitting by hand to ensure proper alignment. Use a wrench to tighten to the recommended torque (25‑30 Nm for M14x1.5 brass fittings). The precision‑machined seating surface provides stable support for the nut, ensuring even clamping force distribution. Avoid over‑tightening, which can damage threads or distort the seating surface. After installation, pressurise the system and check for leaks with soapy water. If the connection is in a high‑vibration zone, periodically re‑check the torque to ensure it remains secure. Regular inspection for corrosion or thread wear will help maintain long‑term reliability.
Selecting the WG9000361009 genuine nut seat directly impacts the safety and reliability of your HOWO or Sitrak truck’s pneumatic and hydraulic systems. Inferior nut seats can lead to leaks, pressure drops, and contamination – all of which compromise brake performance, fuel efficiency, and engine cooling. By using a genuine OEM component that adheres to Sinotruk’s exacting standards, you guarantee a perfect seal, optimal flow, and long‑term durability. Fleet operators and workshop professionals consistently trust this nut seat to maintain system integrity, reduce unplanned downtime, and lower overall maintenance expenses. With its proven precision and robust construction, it is the definitive choice for professionals who demand excellence.
“We have standardised on the WG9000361009 nut seats for all our air brake and fuel line connections. The precision‑machined seating surface provides a stable base for the tube nut, eliminating leaks and ensuring reliable connections. This is the only nut seat we trust for our fleet.”
The WG9000361009 nut seat is designed to fit a broad range of HOWO and Sitrak heavy‑duty trucks, including HOWO‑7, HOWO T series, HOWO A7, Sitrak C7H, T7H, and M5G models. It is a direct replacement for the original nut seat used in air brake, fuel, and cooling systems across these vehicle families. The NG12 size and M14x1.5 thread make it compatible with a variety of standard metric tube fittings. Always verify the OEM number WG9000361009 on the part or packaging to ensure correct application.
HOWO and Sitrak trucks are exposed to the harshest environments – from extreme cold to desert heat, from constant vibration to corrosive road salts. The WG9000361009 nut seat is engineered to withstand these challenges. Its brass construction and nickel plating resist corrosion and chemical attack, while precision threads and seating surfaces maintain integrity under high pressure and temperature variations. The precision‑machined seating surface ensures stable support for the tube nut, preventing loosening under severe vibration. This nut seat is built for longevity, providing leak‑free service over the vehicle’s lifetime and reducing the frequency of replacements.
Wide Temperature Range
Reliable from -40°C to +120°C – no loss of sealing or structural integrity.
Vibration Resistant
Precision seating surface provides stable support, preventing loosening under constant vehicle vibration.
Corrosion Protection
Nickel plating provides long‑term resistance to moisture, salt, and aggressive chemicals.
High Pressure Capability
Rated for 20 bar pneumatic and 10 bar hydraulic – suitable for most heavy‑duty systems.
The WG9000361009 nut seat is supplied in protective packaging to ensure safe delivery and convenient storage. Each nut seat is individually wrapped to prevent thread and seating surface damage. Bulk packaging options are available for workshops, fleet depots, and OEM service centres, offering cost savings and streamlined inventory. Every pack is clearly labelled with the OEM number, product name, and key specifications for easy identification. Always verify the OEM number WG9000361009 on the label before installation to ensure you are using the correct genuine component.
OEM: WG9000361009 | Genuine HOWO / Sitrak Nut Seat NG12
Choose WG9000361009 nut seat – the professional‑grade sealing solution that delivers leak‑proof performance, exceptional durability, and reliable operation for your HOWO or Sitrak truck.
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