Hezaosth Gooseneck to 5th Wheel Adapter
$69.99 on Amazon.com (as of October 14, 2026, 11:58 PM EST) View details ↗
The Hezaosth Gooseneck to 5th Wheel Adapter is a versatile, high-capacity solution for converting between pop-up gooseneck trailers and standard fifth-wheel setups. Engineered for durability and adaptability, this adapter features a perfect-fit 4-inch round gooseneck kingpin coupler that seamlessly integrates with existing gooseneck trailer tubes, making it ideal for semi-trailers or pickup trucks equipped with fifth-wheel pre-styles. The design allows for quick and easy conversion—simply slide the heavy-duty wall tube coupler into place and secure the SAE-standard main pin adapter, enabling hassle-free switching between trailer types.
Built to withstand harsh conditions, this adapter incorporates a rust-proof blueing anti-rust process, enhancing corrosion resistance by 300% compared to standard coatings. This makes it well-suited for extreme environments, including cold climates, coastal areas, and rainy regions. The adapter’s robust construction includes an integral forged alloy steel structure with a laser-welded kingpin base, ensuring unmatched stability and load-bearing performance. With a 7/20-inch wall thickness, it supports a rated load capacity of over 30,000 pounds, providing peace of mind for heavy-duty towing applications. Additionally, the adjustable height mechanism accommodates most standard round gooseneck tubes, offering four height settings to ensure compatibility with a wide range of vehicle models.
| Load Capacity | Over 30,000 lbs |
|---|---|
| Material | Forged alloy steel with laser-welded kingpin base |
| Wall Thickness | 7/20″ |
| Rust Resistance | 300% improved via blueing anti-rust process |
| Compatibility | Standard 4″ round gooseneck tubes and SAE fifth-wheel pins |
| Adjustable Height Settings | 4 |






