Spring Washer
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The 90003931122 OEM Spring Washer is a precision-engineered locking component manufactured exclusively for the Shacman X5000 heavy-duty truck platform. This specialized washer features a split or coiled design that acts as a compressed spring element under the head of a bolt or nut, maintaining a continuous axial clamping force that prevents the fastener from loosening under the severe vibration, thermal cycling, and dynamic loading conditions encountered throughout the engine, chassis, and body assemblies of a heavy-duty commercial vehicle.
Manufactured from high-grade spring steel or stainless steel with a precisely controlled split gap, material thickness, and overall height, the spring washer delivers exceptional spring-back resilience, consistent clamping force, and long-term resistance to permanent set or fatigue cracking. The 90003931122 part features accurately formed inner and outer diameters that fit perfectly around the bolt or stud shank and within the counterbore or bearing surface, ensuring uniform load distribution and reliable locking performance.
Installing a genuine OEM spring washer at every critical bolted joint preserves the designed clamp load and prevents the fastener loosening that can lead to component separation, fluid leaks, and catastrophic assembly failure. The 90003931122 identifier provides complete traceability to Shacman’s rigorous material specifications and precision manufacturing quality assurance standards for this essential fastening component.
| Parameter | Specification | Details |
|---|---|---|
| OEM Part Number | 90003931122 | Unique Shacman X5000 identifier |
| Product Name | Spring Washer | Split-ring or coiled locking washer |
| Brand / Vehicle Model | Shacman X5000 | Heavy-duty truck series |
| Material | High-grade spring steel or stainless steel | Excellent spring-back and fatigue resistance |
| Manufacturing Process | Precision stamped, coiled, and heat treated | Consistent dimensions and spring characteristics |
| Locking Mechanism | Split-ring spring action with sharp edges | Bites into fastener and mating surface to resist rotation |
| Surface Finish | Zinc-plated, phosphated, or passivated | Corrosion protection for under-hood and chassis use |
| Split Configuration | Single split with offset ends | Provides spring compression and locking bite |
| Application | Engine, chassis, and body bolted assemblies | Prevents fastener loosening from vibration and thermal cycling |
| Packaging | Protective sealed packaging | Shacman genuine labeled packaging |
The spring washer’s split ends dig into the fastener head and the mating surface, creating a mechanical lock that resists the rotational loosening forces generated by continuous engine and road vibration during vehicle operation.
The 90003931122 washer acts as a compressed spring, maintaining residual clamp force even if the bolted components settle, compress, or experience thermal expansion and contraction during engine heat cycles.
By preventing fastener loosening, the spring washer protects the integrity of the entire bolted assembly, preventing the fluid leaks, component separation, and structural failures that can result from a loose fastener.
The spring washer 90003931122 is installed under the head of a bolt or under a nut on the Shacman X5000 vehicle, positioned between the fastener and the component being secured. Before installation, the washer and the mating surfaces must be clean and free of debris, oil, or corrosion that could reduce the washer’s gripping effectiveness. The washer is placed over the bolt or stud shank with the split gap facing the direction that will provide the most effective locking action as the fastener is tightened. The fastener is then installed and torqued to the specified value, which compresses the spring washer flat and engages the sharp split ends into both the fastener head and the mating surface. It is critical to use the correct torque value; under-tightening will not fully compress the washer and engage the locking feature, while over-tightening can flatten the washer permanently, destroying its spring and locking properties. Spring washers are generally single-use components and should be replaced whenever the fastener is removed.
Each spring washer produced under OEM number 90003931122 is manufactured from high-grade spring steel or stainless steel wire or strip material selected for its specific combination of strength, hardness, and corrosion resistance. The material is precision-coiled or stamped to form the split-ring shape, with the ends offset to create the spring effect and the sharp edges that provide the locking bite. The manufacturing process is carefully controlled to achieve the exact inner diameter, outer diameter, material thickness, and free height specified by Shacman engineering.
After forming, the washer undergoes heat treatment to achieve the specified spring temper and hardness. This heat treatment is critical for giving the washer its ability to flex under load and spring back to its original shape, while also being hard enough that the split ends can bite into the fastener and mating surface. The washer then receives a surface treatment such as zinc electroplating, phosphating, or passivation that provides corrosion protection. Each production batch undergoes dimensional inspection to verify inner diameter, outer diameter, thickness, and free height. Sample washers are subjected to load-deflection testing and hardness testing to confirm they meet Shacman’s stringent performance standards. The washers are packaged in sealed quantities and labeled with the 90003931122 part number for complete traceability.
Spring washers should be visually inspected whenever the fastener they secure is removed for service. Technicians should examine the washer for any signs of flattening, which indicates the washer has taken a permanent set and has lost its spring locking ability. The split ends should be checked to ensure they are still sharp and offset; ends that have become rounded or flattened will not bite effectively and the washer must be replaced.
Spring washers are designed as single-use components. Whenever a bolted joint is disassembled, the old spring washer should be discarded and replaced with a new 90003931122 component. Reusing a spring washer risks fastener loosening because the washer may have lost its spring tension or the sharp edges may have been dulled from the previous installation. The cost of a new spring washer is negligible compared to the potential damage and safety risk caused by a critical fastener that loosens and allows a component to separate during vehicle operation.
Procuring the authentic spring washer for your Shacman X5000 fastening application is a simple process that ensures reliable fastener locking and joint integrity. Use the inquiry button above to verify current stock availability and request a prompt quotation. We maintain comprehensive inventory of these essential locking components to support both individual assembly repairs and complete fleet maintenance programs across all international markets.
To ensure you receive the exact factory-specified spring washer with correct dimensions and spring characteristics for your application, always reference the OEM part number 90003931122 in your purchase order. Our logistics team provides complete export documentation with every international shipment for efficient customs clearance and inventory verification at your facility.
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Immediate dispatch for Shacman X5000 fastening applications worldwide.
Choosing the genuine Spring Washer 90003931122 is a decision that directly protects the structural integrity and safety of your Shacman X5000 vehicle’s critical bolted assemblies. Aftermarket spring washers manufactured from inferior steel or with incorrect heat treatment can fail to provide effective locking, allowing fasteners to loosen under the constant vibration and thermal cycling of heavy-duty truck operation. A loosened fastener in a critical location such as a suspension component, steering linkage, or brake system can lead to component separation and a catastrophic loss of vehicle control.
The OEM spring washer’s specific material grade, precise split geometry, and controlled heat treatment were validated through extensive vibration testing and fastener joint analysis. Shacman engineers specified this exact washer design to provide the reliable locking performance that each critical bolted joint on the X5000 vehicle requires. The 90003931122 washer delivers the dependable fastener retention that keeps components securely assembled and functioning correctly across hundreds of thousands of demanding kilometers.
Professional fleet technicians and maintenance managers worldwide standardize on the 90003931122 spring washer for its guaranteed material quality, precise fit, and proven locking reliability in the field. This small but critical fastening component plays a vital role in maintaining the mechanical integrity of the vehicle’s assemblies, preventing the loosening that can lead to noise, wear, component damage, and safety hazards. Trust only the spring washer that Shacman engineered and certified for the demanding X5000 heavy truck platform.
The spring washer 90003931122 operates on a dual locking principle: the spring action maintains a continuous axial force on the fastener, while the sharp, offset split ends mechanically engage both the fastener head and the mating surface to resist rotation. When the fastener is tightened, the washer is compressed flat, storing spring energy. If the joint begins to loosen, the washer tries to expand back to its free height, maintaining clamp load. Simultaneously, the sharp ends dig into the surfaces, creating a mechanical interference that prevents the fastener from rotating counterclockwise and unscrewing.
Spring washers are most effective on relatively soft mating surfaces where the sharp split ends can achieve a good bite. On very hard surfaces, the ends may not penetrate effectively, and the locking action relies more on the spring tension alone. For critical applications, Shacman engineers specify the exact washer material and hardness that is compatible with the specific fastener and component materials, ensuring optimal locking performance. Using the correct OEM washer for each application is essential for achieving the designed joint security.
For our international customers, we take exceptional care in packaging the 90003931122 spring washers to prevent any corrosion, deformation, or damage to the split ends during global transit and extended warehouse storage. The washers are packed in sealed, moisture-resistant packaging that preserves their surface finish and sharp locking edges. Partner with our global supply network for a reliable source of genuine Shacman fastening components, and ensure that every critical bolted joint on your fleet’s vehicles remains tight, secure, and safe for the long haul.
