ISUZU Leaf Spring Center Bolt 12×220mm High-Strength Steel OEM Standard for NPR NKR CXZ FVR
| Dimensions: | 12×220mm (Diameter × Length) | Material: | High-Strength Steel |
| Strength Grade: | Grade 12.9 (reference) | Part Type: | Suspension System Leaf Spring Fastener |
| Installation Position: | Leaf Spring Center / Axle Spring Seat | Weight: | Standard |
| Thread Size: | Per Standard Thread Specification | Bolt Hardness: | Per Grade 12.9 Standard |
| High Light: | 12×220mm Leaf Spring Center Bolt,High-Strength Steel Center Pin,OEM Standard Leaf Spring Fastener |
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The ISUZU Leaf Spring Center Bolt with OEM numbers 1-51356211-0 / 1513562110 is a precision-engineered replacement designed for ISUZU NPR, NKR, CXZ, and FVR series trucks. This critical suspension component aligns and secures individual leaf spring leaves at the center position, ensuring the integrity and load-carrying capacity of the leaf spring assembly.
The leaf spring center bolt is a critical fastening component installed at the center position through all leaf spring leaves:
- Alignment: Passes through center holes of all leaf spring leaves for precise longitudinal and lateral alignment
- Load Transfer: Binds leaf spring leaves together to function as a single unit for load carrying
- Mounting Location: Positions the leaf spring assembly on the axle spring seat for correct suspension installation
- Prevention of Misalignment: Prevents relative movement between leaf spring leaves during vehicle operation
| Symptom | Probable Cause |
|---|---|
| Noticeable vehicle lean or uneven ride height | Broken or loose center bolt; leaf spring misalignment |
| "Clunking" metallic noise from chassis on rough roads | Loose or broken center bolt; relative movement between spring leaves |
| Visual inspection shows bent, cracked, or severely rusted bolt | Material fatigue or corrosion from long-term use |
| Visible misalignment between leaf spring leaves | Center bolt failure; unable to maintain spring leaf alignment |
| Reduced load capacity; suspension feels noticeably softer | Center bolt failure; leaf spring cannot function as unified assembly |
| Part Number | 1-51356211-0 1513562110 |
| Product Name | Leaf Spring Center Bolt |
| Car Model | NPR NKR |
| Engine Model | CXZ |
| Condition | 100% Brand New |
| Size | 12×220mm Standard |
| Material | High-strength steel construction (Grade 12.9) |
| Origin | China Mainland |
| Brand | Model Series | Chassis | Notes |
|---|---|---|---|
| ISUZU | NPR | NPR | Light/medium-duty truck |
| ISUZU | NKR | NKR | Light-duty truck |
| ISUZU | NHR | NHR | Light-duty truck |
| ISUZU | 100P | 100P | Light-duty truck |
| ISUZU | ELF | ELF | Light-duty truck |
| ISUZU | CXZ | CXZ | Heavy-duty truck |
| ISUZU | CVR | CVR | Heavy-duty truck |
| ISUZU | FVR | FVR | Heavy-duty truck |
| ISUZU | FVZ | FVZ | Heavy-duty truck |
| ISUZU | Giga | — | Heavy-duty truck series |
Ensures precise fitment with leaf spring leaves for reliable alignment and fixation
Excellent tensile strength and fatigue resistance for long-term reliable operation
18–20 years experience with mature production systems and extensive industry network
Every piece undergoes strict quality inspection for zero-defect delivery
Reliable after-sales protection with quality guarantee
Fits multiple ISUZU models with all diesel engines
| QC Item | Inspection Method | Acceptance Criterion |
|---|---|---|
| Bolt diameter | Micrometer / Calipers | 12mm ± tolerance |
| Bolt length | Height gauge / Calipers | 220mm ± tolerance |
| Thread size & precision | Thread gauge | Per standard thread specification |
| Material composition | Spectrometer | Per high-strength steel standard |
| Bolt hardness | Rockwell/Vickers tester | Per Grade 12.9 standard |
| Tensile strength | Universal tensile testing machine | Per Grade 12.9 standard |
| Surface anti-corrosion | Salt spray test | Per anti-corrosion standard |
| Visual inspection | Visual | No cracks, burrs, or rust |
- Preparation: Confirm installation position and part number. Prepare socket wrench, torque wrench, jack + safety stands
- Removing Old Center Bolt: Park vehicle securely, support axle, remove U-bolts and leaf spring assembly
- Installing New Center Bolt: Clean surfaces, align spring leaves, insert new center bolt, install nut and torque to specification
- Post-Installation Checks: Confirm torque specifications, check suspension height and balance, perform road test
| Packaging | Neutral Carton |
| Brand | IZUMI / BZLP |
| Place of Origin | China |
| Minimum Order Quantity | Typically 5 pieces/model |
| Delivery Time | 7–30 days |
| Supply Capacity | 10000 sets/month |
| Warranty | At least 1 year |
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