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Discover the specialized BY90003962612 Hollow Screw, a uniquely engineered fastener designed for critical fluid passage and mounting applications in SHACMAN heavy-duty trucks. This genuine OEM component is far more than a standard screw; it is a precision-machined part that allows for the internal transfer of fluids, gases, or wiring while simultaneously securing components.
As a trusted supplier of Shacman truck parts, we recognize the importance of specialized fasteners in complex assemblies. The BY90003962612 is manufactured from high-grade materials to exact tolerances, ensuring a perfect seal and secure fit in applications where a solid screw would be insufficient. Its hollow core design is essential for routing hydraulic lines, fuel passages, sensor cables, or providing ventilation in housings and brackets. Understanding the role of this specific fastener is crucial for proper assembly, leak prevention, and maintaining the integrity of your truck’s fluid and electrical systems during repairs, overhauls, or component upgrades.
Hollow Screw
Precision-Machined Hollow Core Design: The BY90003962612 features a perfectly centered and smoothly finished axial bore, allowing for the reliable passage of fluids, air, or small wiring harnesses without obstruction or risk of damage to the internal contents.
High-Strength Alloy Construction: Fabricated from durable steel or alloy, this screw provides the necessary tensile and shear strength to securely clamp components while maintaining the structural integrity of its hollow passage under vibration and load.
Integrated Sealing Surfaces: Often designed with specific under-head features, machined shoulders, or O-ring grooves to create a positive seal against the mounted surface, preventing external leaks of fluid or pressure from the internal passage.
Corrosion-Resistant Finish: Treated with protective coatings such as zinc plating, galvanization, or other specialized finishes to resist rust and degradation from exposure to engine oils, hydraulic fluid, coolant, and environmental elements.
The table below provides detailed technical specifications for the SHACMAN BY90003962612 Hollow Screw. This information is vital for identifying the correct component and ensuring its proper function within your truck’s system.
| Parameter | Value / Description |
|---|---|
| OEM Part Number | BY90003962612 |
| Product Name | Hollow Screw |
| Brand | SHACMAN |
| Primary Material | Steel Alloy (e.g., Carbon Steel, Alloy Steel) |
| Surface Treatment | Zinc Plated, Phosphate Coated, or Geomet® |
| Head Style | Hex Head, Flange Head, or Special Design |
| Drive Type | Hex Socket (Allen), External Hex, or Multi-spline |
| Thread Specification | Metric (e.g., M8x1.25, M10x1.5) – Fine or Coarse |
| Bore Diameter (Hole Size) | Application Specific (e.g., 3mm, 4mm, 5mm) |
| Strength Class | 8.8, 10.9, or 12.9 (High Strength for Critical Apps) |
| Primary Function | To fasten components while providing a through-hole for fluid, air, or wiring. |
Always verify the exact specifications of BY90003962612 using official SHACMAN documentation. The bore size and thread details are critical for system function.
The SHACMAN BY90003962612 Hollow Screw is deployed in specific locations where its dual function is required. It is commonly found in hydraulic valve blocks, sensor mounting bosses, and fluid distribution manifolds.
One key application is in hydraulic systems, where it serves as a port plug or a connection point that also allows fluid to pass through to another gallery within a component. This eliminates the need for separate external piping.
In engine and transmission systems, it may be used to mount sensors (like oil pressure or temperature sensors) where the screw’s hollow center allows the sensor probe to access the fluid chamber directly.
Another use is in air systems or crankcase ventilation, where the screw acts as a secure fastener with a built-in ventilation or pressure equalization passage. The BY90003962612 solves space and design constraints elegantly.
Its functional purpose is to reduce part count, simplify assembly, and create more compact and reliable system designs by integrating a fluid passage directly into a structural fastener.
1. Identify the correct BY90003962612 screw by matching its part number, thread, length, and bore diameter to the service manual specification.
2. Thoroughly clean the threaded hole and the sealing surface on the component. Ensure the hollow passage is free of debris, metal chips, or old sealant.
3. If specified, apply the correct sealant (e.g., liquid thread sealant for fuel/hydraulics) to the threads, taking care not to clog the internal bore.
4. For screws sealing with an O-ring or copper washer, ensure the new seal is correctly positioned on the screw before installation.
5. Start threading the screw by hand to avoid cross-threading, which is especially critical for hollow screws as their walls may be thinner.
6. Tighten the screw to the specified torque using a calibrated torque wrench. Over-tightening can distort the screw or crack the housing.
7. After installation, verify that the internal passage is clear by checking for proper system flow or sensor operation.
• During system servicing, inspect the BY90003962612 for signs of thread damage, corrosion in the bore, or cracks around the head/shank junction.
• Check for leaks around the screw’s seating area. A leak here indicates a failed seal or a damaged sealing surface.
• If removed, use a small brush or compressed air to ensure the internal passage is completely clean before reinstallation or replacement.
• Never substitute a solid screw for a hollow screw, even if the threads match. This will block a critical passage and cause system failure.
• Replace the screw if there is any doubt about its integrity. The cost of a new BY90003962612 is minimal compared to the damage caused by a failure.
• Keep a record of where these specialized fasteners are used in your trucks for faster identification during future repairs.
Precision is paramount when installing hollow screws. Always follow the manufacturer’s torque and sealant specifications to ensure both a leak-proof seal and an unobstructed internal passage.
Selecting the genuine BY90003962612 guarantees precise bore diameter, correct thread geometry, and material properties that meet SHACMAN’s engineering requirements for strength and corrosion resistance.
Aftermarket or generic hollow screws may have inconsistent bore quality (rough interiors, off-center holes) that can restrict flow, damage sensor wires, or create turbulence. Their strength rating may also be unknown.
The genuine BY90003962612 is designed to work seamlessly with the specific sealing method (O-ring, washer, tapered seat) of its application, ensuring a leak-free interface under system pressure and temperature cycles.
Using the OEM part ensures the integrated system—whether hydraulic, fuel, or sensor-based—functions as intended, maintaining performance, safety, and reliability standards.
SHACMAN master technicians note that the BY90003962612 is often overlooked but is critical in systems where it is used. Misidentifying it can lead to lengthy diagnostic troubles.
Hydraulic system specialists emphasize that the cleanliness of the hollow bore is as important as the threads. A blocked passage in a valve block can render an entire hydraulic function inoperative.
Fleet parts managers highlight the value of sourcing these specialized fasteners from genuine channels. It prevents misapplications that can cause costly downtime and component damage.
The BY90003962612 contributes to system reliability by providing a robust and sealed passage. A leak at this point can lead to fluid loss, pressure drops, and contamination ingress.
In sensor applications, a properly installed hollow screw ensures accurate readings by allowing the sensor direct access to the medium being measured without any interference or damping.
By enabling compact design, the BY90003962612 helps reduce the number of potential leak points that would exist if external pipes and separate fittings were used instead.
Each genuine BY90003962612 is produced with stringent quality controls, including dimensional checks of the thread, head, and most importantly, the internal bore diameter and finish.
Material certification and batch traceability are standard for such OEM components, providing assurance that the fastener meets the mechanical and chemical specifications for its demanding role.
Choosing the authentic BY90003962612 means you are installing a part with proven performance history and full accountability back to the SHACMAN manufacturing standard.
While the unit price of a BY90003962612 may be higher than a standard screw, its value lies in enabling a specific, often essential, system function that has no alternative.
The cost of misdiagnosing a problem caused by a missing or incorrect hollow screw—involving hours of labor and potentially damaged major components—dwarfs the part’s price.
For maintenance operations, having the correct genuine specialized fastener in stock prevents repair delays and ensures jobs are completed correctly the first time.
Always use the OEM number BY90003962612 when ordering. Descriptions like “hollow screw” are too generic and will lead to receiving an incorrect part.
Examine the old screw carefully. Note its length, thread pitch, head style, drive type, and measure the bore diameter. Compare these to the new part before installation.
Consult the SHACMAN parts catalog or a certified dealer with your truck’s VIN to confirm the application and the specific version of the hollow screw required for your vehicle’s configuration.
The SHACMAN BY90003962612 Hollow Screw is a brilliant example of functional engineering, where a simple fastener is optimized to perform a dual role critical to system operation.
Choosing the genuine BY90003962612 is a decision for precision, reliability, and adherence to the original design intent. It ensures fluid systems are sealed, sensors read accurately, and assemblies remain compact and robust.
Do not compromise on these specialized components. Equip your workshop with the authentic BY90003962612 Hollow Screw to guarantee perfect form, function, and reliability in every intricate assembly you service or rebuild.
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