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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
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.
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.
Yimi (Guangzhou) Automotive Parts Co., Ltd.
Located in Guangzhou—the economic and transportation hub of Southern China—we are a specialized supplier and exporter with over 20 years of experience in the automotive parts industry. We focus on the production and sales of high-quality ... Yimi (Guangzhou) Automotive Parts Co., Ltd.
Located in Guangzhou—the economic and transportation hub of Southern China—we are a specialized supplier and exporter with over 20 years of experience in the automotive parts industry. We focus on the production and sales of high-quality ...
