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Discover the critical BY612630090006 Nut, a precision-engineered fastener specifically designed to secure high-pressure connections within SHACMAN diesel fuel injection systems. This genuine OEM component, though seemingly simple, plays a vital role in maintaining the structural integrity and leak-proof seal of fuel rails, injectors, and high-pressure pipe assemblies. As a trusted supplier of Shacman truck parts, we understand that the reliability of the entire fuel system often depends on the quality of fasteners like the BY612630090006.
Manufactured from high-grade alloy steel and finished to exact SHACMAN specifications, this nut is engineered to withstand extreme clamping forces, continuous vibration, and corrosive environments. Its precise thread geometry and strength are essential for achieving and maintaining the correct torque on critical connections. Using the correct BY612630090006 nut during assembly or repair is fundamental to preventing dangerous fuel leaks, ensuring consistent injection pressure, and guaranteeing the long-term reliability and safety of your heavy-duty engine.
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High-Strength Alloy Steel Construction: The BY612630090006 nut is forged from a specific grade of heat-treated alloy steel, providing exceptional tensile strength and resistance to stretching or shearing under the extreme clamp loads required for high-pressure fuel sealing.
Precision-Cut Thread Profile: Features machine-cut threads with exact pitch, depth, and flank angle to ensure perfect engagement with its mating bolt or stud, minimizing the risk of cross-threading and ensuring consistent, accurate torque application.
Corrosion-Resistant Surface Finish: Coated with a durable protective layer such as zinc plating, dichromate, or other specialized finish to prevent rust and corrosion from fuel, moisture, road salt, and engine chemicals, ensuring long-term serviceability.
Consistent Hardness and Dimensional Stability: Manufactured under strict quality controls to ensure uniform hardness (Rockwell scale) across every batch, preventing deformation under torque and guaranteeing a reliable, repeatable clamping force every time.
The table below provides detailed technical specifications for the BY612630090006 Nut. This information is essential for verifying compatibility and ensuring correct installation in your SHACMAN truck’s fuel system.
| Parameter | Value / Description |
|---|---|
| OEM Part Number | BY612630090006 |
| Product Name | Nut |
| Brand | SHACMAN |
| Primary Material | Alloy Steel (e.g., Grade 8 or 10 equivalent) |
| Surface Treatment | Zinc Plating, Yellow Dichromate, or Phosphate |
| Thread Size & Pitch | Metric Fine Thread (Specific to application, e.g., M10x1.0) |
| Width Across Flats (Wrench Size) | 17mm, 19mm, or as per SHACMAN specification |
| Height/Thickness | Standard or Flange type as required |
| Proof Load / Strength Grade | High Grade (Suitable for high-pressure applications) |
| Temperature Range | -40°C to +150°C (Operating environment) |
| Application | High-Pressure Fuel Line, Rail, Injector, or Pump Mounting |
| Compatible SHACMAN Models | X3000, M3000, F3000 series with common rail engines |
Always confirm BY612630090006 compatibility with your specific fuel system component using the official SHACMAN parts catalog or your Vehicle Identification Number (VIN).
The BY612630090006 Nut is deployed at critical junctures in the SHACMAN high-pressure fuel circuit. It is typically used to secure the connectors of high-pressure fuel pipes to the common rail or injectors, or to fasten the rail itself to the cylinder head.
Its primary function is to apply and maintain a specific clamping force. This force crushes the sealing element (such as a copper washer or O-ring) to create a metal-to-metal seal capable of containing fuel at pressures exceeding 2000 bar. The nut also absorbs vibrational loads, preventing loosening.
Incorrect torque or using an inferior BY612630090006 substitute can have catastrophic results. Under-torquing leads to leaks; over-torquing can strip threads, distort components, or over-compress seals, leading to failure. This fastener directly influences the safety and performance of the entire injection system.
Its role is to translate the precise rotational force applied by a torque wrench into a reliable, static axial force that remains constant despite thermal cycling and engine vibration throughout the component’s service life.
1. Depressurize the fuel system completely. Ensure the mating threads on the bolt, stud, or component are clean, undamaged, and free of old thread-locking compound.
2. Hand-start the new BY612630090006 nut to ensure it threads on smoothly without resistance or cross-threading. Never force it.
3. If specified by SHACMAN, apply a small amount of the correct thread lubricant or anti-seize compound to the threads. This ensures accurate torque reading.
4. Using a calibrated torque wrench, tighten the nut in stages according to the specified torque value and sequence (e.g., for a rail with multiple fasteners).
5. Apply the final torque in a smooth, steady pull. Do not use impact wrenches for final tightening on high-pressure fuel components.
6. If the fastener has a prevailing torque feature (like a nylon insert), note the increased turning resistance is normal after the nut seats.
7. After assembly, mark the nut and adjacent surface with torque stripe paint to provide a visual indicator of any subsequent loosening.
• During routine service, visually inspect all high-pressure fuel connections secured by BY612630090006 nuts for signs of fuel wetness, rust, or damaged torque stripes.
• Check for any nuts that appear recessed or proud compared to their neighbors, which may indicate a stretched stud or incorrect installation.
• Never reuse a nut that has been torqued to its yield point (as in stretch bolts) or shows signs of thread deformation, corrosion, or rounding of the flats.
• When replacing any high-pressure fuel line or injector, always use new nuts if specified by the manufacturer. The clamping force is a one-time design.
• Keep a record of critical torque values applied during repairs for future reference and warranty validation.
• Use only the correct size, undamaged socket or wrench to avoid rounding the nut’s corners, which can make future removal difficult.
Proper installation of the BY612630090006 is a cornerstone of professional fuel system repair. Precision in torque application is not optional; it is required for safety and performance.
Choosing the genuine BY612630090006 Nut is a critical decision for system integrity. SHACMAN specifies a particular steel alloy, heat treatment, and plating that matches the corrosion resistance and strength requirements of the mating components.
Generic nuts from hardware stores may have the same thread size but are often made from lower-grade materials. They can stretch under load, have inconsistent hardness leading to inaccurate torque, or use a plating that corrodes quickly in the engine environment. This mismatch can cause joint failure.
The genuine BY612630090006 is part of a engineered fastening system. Its dimensions are optimized to work with specific washers or flanges, and its strength is calculated to achieve the correct clamp load without damaging the threads of expensive components like the fuel rail or cylinder head.
Master technicians report that using genuine fasteners like the BY612630090006 provides a consistent “feel” during torquing, giving confidence that the specified clamp load has been achieved correctly.
Fleet maintenance managers note that standardizing on OEM fasteners reduces instances of thread stripping, broken studs, and comebacks for leaks, streamlining repair processes and improving workshop efficiency.
The reliability of a properly torqued, high-quality nut is absolute. It is a component that, when chosen and installed correctly, is never thought about again—which is the highest compliment for a critical fastener.
A failed BY612630090006 nut can be the single point of failure leading to a high-pressure fuel spray, creating an extreme fire and safety risk. Using the correct, high-integrity fastener is a primary safety measure.
By ensuring a leak-free connection, it prevents hydrocarbon emissions and fuel waste. It also prevents environmental contamination from fuel dripping onto the ground.
The durability and corrosion resistance of the genuine nut mean it can be removed and potentially reused during service (if allowed), reducing waste compared to fasteners that corrode and must be cut off.
Each batch of BY612630090006 nuts undergoes material certification and dimensional checks to ensure compliance with strength and thread geometry standards.
As a genuine SHACMAN component, it is covered by the manufacturer’s warranty, providing assurance of its quality and fitness for purpose in this critical application.
Purchasing from authorized channels guarantees you receive the authentic BY612630090006 with the correct specifications, protecting your repair and the vehicle’s overall warranty.
The cost of a genuine BY612630090006 nut is insignificant compared to the labor cost of diagnosing an elusive leak, the price of a new fuel rail damaged by a overtightened or failed fastener, or the tow bill for a stranded vehicle.
Its reliability ensures the repair is completed once, correctly. This maximizes vehicle uptime and eliminates costly comebacks, making it an extremely cost-effective component in the context of a major repair.
Investing in the correct OEM fastener is the ultimate form of preventive maintenance for the joint it secures. It is a minimal investment that safeguards a much larger one.
The BY612630090006 Nut is designed for one or several specific locations within a SHACMAN fuel system. Using a nut with the wrong thread pitch, strength grade, or thickness can compromise the joint.
The OEM number BY612630090006 guarantees the exact material, dimensions, and strength required for that specific application. Substitution based on thread size alone is a common and potentially dangerous error.
Always refer to the official parts diagram to identify the correct fastener for each location. When disassembling, organize and label fasteners to ensure the correct ones are reinstalled in their original positions.
The BY612630090006 Nut exemplifies that in engineering, there are no unimportant parts. Its role in securing the high-pressure fuel system is fundamental to safety, reliability, and performance.
Choosing the genuine BY612630090006 is a commitment to precision, safety, and the long-term integrity of your SHACMAN engine. Do not let a small component be the weak link in a critical system.
For your next fuel system service, insist on the authentic SHACMAN BY612630090006 Nut. Apply the correct torque, achieve the perfect seal, and drive with the confidence that comes from genuine quality.
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