Gooseneck Trailer to 5th Wheel King Pin Adapter Kit, Fits 4" Square Tube, Adjustable Height for Level Towing, 30K Heavy Duty Capacity, Reinforced Gusset Base, Lock Pin & 2 Lube Plates

GOOSENECK TRAILER TO 5TH WHEEL KING PIN ADAPTER KIT Convert your gooseneck trailer for use with a standard 2" fifth wheel king pin hitch with a more complete installation solution. This kit includes the inner tube, outer tube, and lock pin, making it ideal for users who want a fuller conversion setup rather than sourcing additional tube hardware separately. ADJUSTABLE HEIGHT FOR LEVEL TOWING With up to 6" of vertical adjustment, this adapter kit helps you work toward a better level towing setup. It gives users more flexibility when matching trailer height to different trucks, correcting towing stance, or improving setup balance for long-distance hauling and heavy trailer work. 30,000-LB HEAVY-DUTY CAPACITY Rated for up to 30,000 lbs, this rigid steel adapter kit is designed for demanding trailer use. It is well suited for equipment transport, flatbed hauling, livestock trailers, farm and ranch work, utility hauling, and other heavy-duty towing applications where a direct mechanical structure is preferred. REINFORCED GUSSET BASE + LOCK PIN The reinforced gusset base strengthens the lower king pin section and adds visible structural support where it matters most. The included outer tube and lock pin make this version a more complete and installation-friendly option for users who want added setup convenience and a clearer retention solution. INCLUDES 2 FIFTH WHEEL HITCH LUBE PLATES Two fifth wheel hitch lube plates are included to help reduce metal-to-metal contact, minimize grease mess, and reduce wear on the hitch surface over time. This helps improve everyday towing maintenance and keeps the contact area cleaner during repeated use. REAL-WORLD APPLICATIONS Flatbed trailer conversion for fifth wheel towing Farm and ranch hauling applications Livestock and utility trailer transport Equipment and machinery towing Heavy trailer setups where a complete adapter kit is preferred WHY CHOOSE THIS VERSION This version is ideal for users who want a more complete package. Instead of buying only the inner tube and sourcing other hardware separately, this kit provides the inner tube, outer tube, and lock pin together for a more convenient setup path. IMPORTANT Please confirm your trailer tube dimensions and fifth wheel hitch compatibility before purchase.

• COMPLETE ADAPTER KIT FOR 4" SQUARE TUBE APPLICATIONS This kit includes the inner tube, outer tube, and lock pin, creating a more complete gooseneck-to-fifth-wheel conversion solution. Designed for 4-inch square tube trailer applications and a standard 2" fifth wheel king pin hitch connection.
• HEIGHT ADJUSTABLE FOR LEVEL TOWING The adjustable multi-hole design provides up to 6 inches of vertical adjustment to help create a better level towing setup. Useful for matching different truck heights, trailer stances, and hauling conditions where towing balance matters.
• 30K LBS HEAVY-DUTY CAPACITY Built for demanding work with a 30,000-lb capacity, this rigid steel adapter kit is made for flatbeds, heavy utility trailers, equipment hauling, livestock trailers, agricultural towing, and other serious trailer applications.
• REINFORCED GUSSET BASE WITH LOCK PIN SECURITY The lower section features a reinforced gusset base to strengthen the king pin connection area, while the included lock pin adds a more complete retaining solution for users who want a more secure and ready-to-install setup.
• INCLUDES 2 FIFTH WHEEL HITCH LUBE PLATES Comes with 2 fifth wheel hitch lube plates to help reduce friction, lower grease mess, and minimize wear on the hitch contact surface. A practical addition for cleaner maintenance and repeated towing use.
• Professional Towing Guidance & After-Sales Support TOWGUARD provides towing setup recommendations, fitment assistance, and after-sales technical support. If you have questions regarding compatibility, towing configuration, or product coverage, please contact us at towguardsc@163.com. Our team is committed to delivering reliable support and product confidence.