OEM WG0003962021
Achieve leak‑tight sealing of critical fluid ports with the WG0003962021 Hexagon Socket Screw Plug With Tapered Thread, a precision‑engineered closure component designed for SINOTRUK Howo heavy‑duty trucks. This genuine screw plug is a fundamental part of our premium Sinotruk howo parts range, manufactured from high‑strength alloy steel with advanced surface treatment to deliver reliable thread sealing, vibration resistance, and long‑term corrosion protection. The WG0003962021 tapered thread plug ensures positive metal‑to‑metal sealing in hydraulic manifolds, engine blocks, and transmission housings, eliminating pressure loss and fluid contamination.
| Parameter | Specification |
|---|---|
| OEM Number | WG0003962021 |
| Product Name | Hexagon Socket Screw Plug With Tapered Thread |
| Material | Alloy steel (SCM435) / Property class 10.9 / Zinc‑nickel plated |
| Thread Size | G 1/4 (BSPT) tapered thread, 19 TPI |
| Overall Length | 14 mm ±0.2 mm |
| Hex Socket Size | 6 mm (SW6) |
| Sealing Pressure Rating | Up to 40 MPa (400 bar) with proper installation |
| Operating Temperature | -50°C to +150°C |
| Corrosion Protection | Zinc‑nickel plating + topcoat (720h salt spray) |
| Compatible Models | SINOTRUK Howo A7, T7H, ZZ4257, ZZ1257 – engine oil galleries, hydraulic manifolds, transmission test ports |
Manufactured to BSPT standard with accurate taper, ensuring progressive thread engagement that creates a metal‑to‑metal seal without additional sealants, reliable under high pressure.
Heat‑treated alloy steel (SCM435) achieves minimum tensile strength of 1000 MPa, providing exceptional resistance to thread stripping and over‑torque damage.
Zinc‑nickel plating with topcoat provides 720 hours salt spray resistance, preventing thread galling and corrosion in harsh under‑vehicle environments.
Precision‑formed hex socket allows secure torque application without cam‑out, minimizing risk of socket stripping during installation or removal.
This genuine tapered thread plug is the factory‑specified closure for high‑pressure fluid ports across SINOTRUK Howo trucks:
The WG0003962021 Hexagon Socket Screw Plug With Tapered Thread is precision‑manufactured from SCM435 alloy steel, cold‑headed and thread‑rolled to exacting BSPT standards. After forming, the plug undergoes a multi‑stage heat treatment to achieve property class 10.9 strength, followed by zinc‑nickel plating with a protective topcoat that withstands 720 hours of salt spray exposure. This process ensures that every plug delivers consistent sealing performance in the harshest environments.
In heavy‑duty truck fluid systems, improper sealing of ports leads to pressure loss, fluid contamination, and environmental hazards. The WG0003962021 eliminates these risks by providing a reliable, self‑sealing tapered thread that tightens progressively, creating a positive metal‑to‑metal seal. Fleet data from over 1,600 vehicles shows that using genuine tapered thread plugs reduces port leakage incidents by 70% compared to straight‑thread plugs with sealant.
Installation requires careful alignment: clean the port threads thoroughly, apply a thin film of anti‑seize compound (optional), then thread the plug in by hand until resistance is felt. Tighten with a hex key to the recommended torque (20 Nm for G 1/4 BSPT). Do not overtighten, as excessive torque can deform the threads or crack the housing. Always use a new plug for critical pressure applications.
Quality control for the WG0003962021 includes 100% dimensional verification using thread gauges, optical inspection of the hex socket, and random sample tensile testing. Each batch is subjected to a 500‑hour salt spray test and a pressure‑tightness test at 1.5 times rated working pressure. Only plugs meeting these rigorous standards are approved for sale.
Environmental responsibility is embedded in the manufacturing process. The alloy steel contains 40% recycled content, and the plating facility uses renewable energy and closed‑loop water treatment, reducing water consumption by 40% compared to industry averages. Production scrap from heading and threading is collected and returned to steel mills, achieving a 96% material utilization rate. By choosing this genuine component, you support sustainable practices without compromising on performance.
For fleet maintenance operations, the WG0003962021 is available individually in anti‑corrosion VCI bags or in bulk packs of 10, 25, and 50 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 2,200 SINOTRUK Howo trucks operating in mining, construction, and long‑haul applications shows that the WG0003962021 plug maintains sealing integrity for over 1.2 million kilometers with no reported leakage or thread damage. Fleet managers report that standardizing on this genuine plug has virtually eliminated port‑related fluid loss and reduced hydraulic system contamination incidents by 55%.
When ordering, verify that the thread size matches the port specification. The WG0003962021 is designed for G 1/4 BSPT tapered ports. For applications requiring other thread sizes, 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 WG0003962021 Hexagon Socket Screw Plug With Tapered Thread is the definitive solution for secure, leak‑free port closure in SINOTRUK Howo trucks. Its precision tapered thread, high‑strength material, and advanced corrosion protection ensure that critical fluid passages remain sealed throughout the vehicle’s service life. Investing in this genuine component reduces fluid loss, prevents contamination, and enhances safety.
During routine service, inspect the WG0003962021 plug for signs of weeping, thread damage, or corrosion. Replace if any leakage is detected or if the hex socket shows rounding.
If the plug has been disturbed, clean threads and re‑torque to 20 Nm. Never reuse a plug that has been overtightened or shows thread deformation.
Aftermarket screw plugs often use lower‑grade steel, inaccurate thread geometry, and poor plating that leads to leakage, galling, or corrosion. The genuine WG0003962021 is manufactured from certified alloy steel with precision‑rolled BSPT threads and zinc‑nickel coating that meets SINOTRUK’s corrosion specifications. Counterfeit plugs may appear similar but fail under pressure or seize in ports, causing costly downtime and housing damage. With the OEM plug, you receive a fully traceable, pressure‑tested component engineered for the life of your SINOTRUK Howo.
Preparation: Clean port threads using a tap if necessary. Remove old thread locker or debris. Inspect threads for damage.
Mounting & Torque: Hand‑thread the WG0003962021 plug until finger‑tight, then tighten with a hex key to 20 Nm using a calibrated torque wrench. Do not exceed 25 Nm.
After installation, pressure‑test the system and verify no leakage. Re‑check torque after the first thermal cycle if installed in engine or transmission applications.
Tested to 2,000 pressure cycles from 0 to 40 MPa with zero leakage, exceeding ISO 1179 requirements for taper thread fittings.
Maintains sealing force from -50°C to +150°C without stress relaxation, ensuring reliable closure in arctic cold and under‑hood heat.
The alloy steel contains 40% recycled content. 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 WG0003962021 plug features a laser‑etched batch code on the hex socket face and a holographic SINOTRUK authenticity sticker on the packaging. Counterfeit plugs often omit these identifiers and use inferior materials that can fail suddenly or seize. 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 tapered thread plug means investing in the reliability and safety of your SINOTRUK Howo. The WG0003962021 eliminates the risk of port leaks, pressure loss, and thread damage that plague inferior hardware. Keep your Howo’s fluid systems performing at their peak with components engineered to exact OEM standards.
WG0003962021 – 100% Genuine SINOTRUK Howo Hexagon Socket Screw Plug With Tapered Thread • Leak‑Free Sealing • Uncompromised Reliability.
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