ISUZU High-Strength Steel U Shape Screw Bolt OEM Standard for Leaf Spring to Axle Connection
Basic Properties
Place of Origin:
CHINA
Brand Name:
YIMI
Certification:
ISO/TS16949
Model Number:
ISUZU Heavy-Duty Truck
Trading Properties
Minimum Order Quantity:
20 PCS
Price:
Negotiable
Payment Terms:
T/T
Supply Ability:
10000 pcs/month
Specifications
| Part Name: | U Shape Screw Bolt | Material: | High-Strength Steel |
| OEM Part Number: | 8-94461228-3 / 8944612283 | Part Type: | Suspension System Leaf Spring Fastener |
| Installation Position: | Leaf Spring To Axle Connection | Minimum Order Quantity: | 5 Pieces |
| Compatible Models: | ISUZU Series Heavy-duty Trucks | Delivery Time: | 5–8 Working Days |
| High Light: | High-Strength Steel U Shape Screw Bolt,OEM Standard Leaf Spring U-Bolt,Leaf Spring to Axle Connection Suspension Fastener |
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Product Description
ISUZU U Shape Screw Bolt 8-94461228-3 8944612283 for ISUZU Heavy-Duty Truck
ISUZU Leaf Spring U-Bolt 8-94461228-3 8944612283 Compatible with ISUZU Heavy-Duty Truck — High-Strength Steel OEM Standard Suspension Fastener
Product Overview
The ISUZU U Shape Screw Bolt with OEM numbers 8-94461228-3 / 8944612283 is a precision-engineered replacement designed for ISUZU series heavy-duty trucks. This component is a critical fastening part of the vehicle's suspension system — the Leaf Spring U-Bolt — responsible for securely fixing the leaf spring to the axle housing.
Numbering Note: This product number is 8-94461228-3 / 8944612283. It is supplied by professional truck parts suppliers meeting ISUZU OEM quality standards. Please verify the specific number based on actual vehicle configuration.
Working Principle
The leaf spring U-bolt is a critical fastening component of the suspension system, installed between the axle and the leaf spring. Its working principle includes:
- Secure Connection: The U-bolt passes over the leaf spring, with both ends passing through the axle spring seat and secured with nuts.
- Load Transfer: Transfers vehicle load from the frame through the leaf spring to the axle, and transmits road impacts from the wheels to the suspension.
- Positioning: Ensures the leaf spring maintains correct position during vehicle operation, preventing relative movement between spring leaves.
- Locking Design: Used with nuts and washers to prevent loosening under long-term vibration conditions.
Failure Symptoms
⚠️ Inspect immediately if any of these occur:
| Symptom | Probable Cause |
|---|---|
| "Clunking" metallic noise from chassis on rough roads | Loose or broken U-bolt; loose leaf spring-to-axle connection |
| Uneven ride height or vehicle leaning to one side | Loose U-bolt causing leaf spring displacement |
| Visual inspection shows bent, cracked, or severely rusted bolt | Material fatigue or corrosion from long-term use |
| Visible misalignment between leaf spring leaves | Failed U-bolt; unable to maintain spring leaf alignment |
| Reduced load capacity; suspension feels noticeably softer | Loose U-bolt preventing proper leaf spring function |
Product Specifications
| Part Number: | 8-94461228-3 8944612283 |
| Product Name: | U Shape Screw Bolt |
| Car Model: | ISUZU Heavy-Duty Truck |
| Condition: | 100% Brand New |
| Material: | High-strength steel |
| Quality Standard: | OEM equivalent / ISO quality control |
Verifiable Data
- ✅ Material Standard: High-Strength Steel — excellent tensile strength and fatigue resistance.
- ✅ Part Name: U Shape Screw Bolt.
- ✅ OE Cross-Reference Verified: Replaces OEM numbers 8-94461228-3 / 8944612283.
- ✅ Compatible Models: ISUZU series heavy-duty trucks.
- ✅ Quality Grade: High Quality — 100% tested before delivery.
- ✅ Supplier Certification: Meets ISUZU OEM quality standards.
- ✅ Condition: Brand New — 100% quality inspected.
- ✅ Supply Capacity: Stable inventory available.
- ✅ Delivery Time: 5–8 working days.
Vehicle Compatibility
| Brand | Model Series | Notes |
|---|---|---|
| ISUZU | Heavy-Duty Truck Series | Suspension system component |
Important Fitment Warnings
- Number Confirmation: This product number is 8-94461228-3 / 8944612283. Verify the specific number on the original part before ordering.
- Installation Torque: Refer to ISUZU factory workshop manual for U-bolt nut torque specifications. Cross-tightening with a torque wrench is mandatory.
- Re-torque After Installation: U-bolts must be re-checked and re-tightened 7–10 days after installation to ensure proper leaf spring seating.
- Associated Components: When replacing U-bolts, it is recommended to inspect leaf spring leaves, center bolt, and shock absorbers — replace if necessary.
- Pair Replacement Recommended: Replace in pairs (left and right) when servicing both sides of the same axle.
- Professional Installation: U-bolts are critical suspension safety components — professional installation is recommended.
Features & Benefits
OEM Standard Design
Manufactured to ISUZU original specifications — ensures perfect fitment for ISUZU heavy-duty trucks; direct OEM replacement, no modification required.
High-Strength Steel Construction
Excellent tensile strength and fatigue resistance for long-term reliable operation under heavy-load conditions — engineered for ISUZU truck suspension applications.
100% Factory Quality Inspection
Every piece undergoes strict quality inspection — 100% tested before delivery.
Professional Supplier Supply
Meets ISUZU OEM quality standards with global sales — provides reliable automotive parts solutions worldwide.
Broad OEM Cross-Compatibility
Replaces OEM numbers 8-94461228-3 / 8944612283 — fits ISUZU series heavy-duty trucks.
Flexible Supply
MOQ 5 pieces, delivery 5–8 working days — meets diverse procurement needs.
Quality Control
| QC Item | Inspection Method | Acceptance Criterion | Frequency |
|---|---|---|---|
| Bolt dimensional accuracy | Calipers / Height gauge | OEM standard size ± tolerance | 100% |
| Thread size & precision | Thread gauge | Per standard thread specification | Batch sampling |
| Material composition | Spectrometer | Per high-strength steel standard | Batch sampling |
| Bolt hardness | Rockwell/Vickers tester | Standard hardness range | Batch sampling |
| Tensile strength | Universal tensile testing machine | Per strength standard | Batch sampling |
| Surface anti-corrosion | Salt spray test | Per anti-corrosion standard | Annual sampling |
| Visual inspection | Visual | No cracks, burrs, or rust | 100% |
| 100% function test | Special inspection equipment | 100% tested | 100% |
Installation & Maintenance
IMPORTANT SAFETY NOTICE: Leaf spring U-bolts are critical suspension safety components that directly affect vehicle load capacity and driving safety. Installation requires leaf spring disassembly and axle alignment — professional installation is recommended. Re-torque 7–10 days after installation.
Installation Guidelines (Reference Workshop Manual):
Preparation
- Confirm installation position (Leaf Spring) and part number (8-94461228-3)
- Prepare tools: Socket wrench, torque wrench, jack + safety stands
- Recommended to also prepare: Leaf spring leaves, center bolt, shock absorbers
Removing Old U-Bolts
- Park vehicle on level surface, engage parking brake, and securely support with jack stands.
- Support the axle with a jack to relieve leaf spring load.
- Remove old U-bolt nuts and carefully remove the old U-bolts.
- Note the position and order of each spring leaf.
Installing New U-Bolts
- Clean mounting surface: Thoroughly clean the axle spring seat and leaf spring contact surfaces — ensure no oil or debris.
- Install leaf spring: Place the leaf spring on the axle spring seat in correct order.
- Install U-bolts: Place the U-bolts over the leaf spring, with both ends inserted into the axle spring seat mounting holes.
- Install washers and nuts: Install washers and nuts, tightening in cross-pattern.
- Final torque: Torque to specification in cross-pattern (refer to ISUZU workshop manual).
Post-Installation Checks (Mandatory)
- Torque check: Confirm U-bolts are torqued to specification.
- Suspension check: Check for correct ride height and left-right balance.
- Re-torque reminder: Re-check and re-tighten U-bolts 7–10 days after installation.
- Road test: Perform road test — confirm no abnormal chassis noise, normal suspension operation.
Maintenance Schedule
| Item | Interval | Notes |
|---|---|---|
| U-bolt re-torque | 7–10 days after installation | Mandatory re-check and re-tighten |
| U-bolt visual inspection | Every 10,000 km / each service | Check for looseness, cracks, rust |
| Suspension noise check | Every 10,000 km / each service | Listen for abnormal noise on rough roads |
| U-bolt replacement | Upon damage/corrosion | Replace in pairs (left and right) |
Packaging & Supply
| Packaging | Neutral packaging or customized per customer request |
| Brand | OEM Standard |
| Place of Origin | China |
| Customization Options | OEM custom packaging / neutral packaging / private labeling |
| Minimum Order Quantity | 5 pieces |
| Delivery Time | 5–8 working days |
| Target Customers | Truck parts wholesalers, heavy-duty truck repair shops, fleet purchasers, export traders |
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