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Shandong Dong Xu Vehicle Co., Ltd.企业会员第1年
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The trailer kingpin is a critical heavy-duty steel pin installed on the underside of a semi-trailer, serving as the primary connection point between the tractor and the trailer. This 3.5-inch model, manufactured by Shandong DongXu Vehicle Co., Ltd., is designed to meet the demanding standards of heavy-haul logistics, providing a secure and reliable pivot point within the fifth wheel coupling. Constructed from high-strength steel and engineered for compatibility with JOST-style fifth wheels, it ensures safe articulation and weight distribution during transport.
| Attribute | Specification |
|---|---|
| Brand Name | Jinqiao (DongXu Brand) |
| Model / Standard | JOST Style, 3.5 Inch (90mm) |
| Material | High-Strength Steel |
| Maximum Load Capacity | 28 Tons (and above) |
| Color | Black (Standard) |
| Warranty | 12 Months |
| Minimum Order Quantity (MOQ) | 10 Sets |
| Origin | Jinan, Shandong, China |
The kingpin is welded or bolted onto the trailer's upper coupler plate. During operation, it slides into the fifth wheel's locking jaws on the tractor, forming the pivotal hinge that allows the truck and trailer to articulate during turns. Proper installation is crucial to prevent premature wear and ensure road safety.
Regular maintenance is essential for the longevity of the kingpin and the entire coupling system. It is recommended to perform a thorough inspection every three months or 30,000 miles.
DongXu Vehicle is a leading OEM/ODM manufacturer and exporter in China with over 20 years of technical accumulation in the trailer industry. The company is a verified supplier on ajfpt.com with a 5.0-star store rating and a 100% on-time shipment rate.
When sourcing through ajfpt.com, buyers can utilize Trade Assurance for order protection:
DongXu Vehicle offers customization services for bulk orders, including:
The product comes with a standard 12-month warranty. The after-sales service typically covers:
Note: Warranty may not cover damage caused by external forces, accidents, or improper installation/use.
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Disclaimer: The information provided is based on publicly available data and is intended for informational purposes only. Always consult with a certified professional for installation and maintenance procedures.
