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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 CapacityOver 30,000 lbs
MaterialForged alloy steel with laser-welded kingpin base
Wall Thickness7/20″
Rust Resistance300% improved via blueing anti-rust process
CompatibilityStandard 4″ round gooseneck tubes and SAE fifth-wheel pins
Adjustable Height Settings4
Can this adapter be used with both semi-trailers and pickup trucks?
Yes, it’s designed for standard gooseneck trailer tubes, making it compatible with semi-trailer tractors as well as pickup trucks equipped with fifth-wheel pre-styles.
How do I switch between gooseneck and fifth-wheel trailer types?
Slide the heavy-duty wall tube coupler into the outer clamping sleeve, then insert and secure the SAE-standard main pin adapter—no additional tools required.
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