When you’re towing serious weight, strength isn’t optional. This gooseneck-to-fifth-wheel coupler adapter is built for heavy-duty use with a 30,000-lb weight capacity. The sturdy steel construction and included load-bearing pin give you a solid, secure connection between your trailer and fifth-wheel hitch. It’s also SAE J2738 compliant, so you can count on it to meet strict industry standards every time you tow.
Every trailer sits a little differently, and this coupler makes it easy to dial in the right height. With 8" of total vertical adjustment and four hole locations spaced 2.66" apart, you can fine-tune your setup for level towing. Fully retracted, it measures 26.8" from the top of the outer tube to the bottom of the king pin, and fully extended it reaches 34.8". That flexibility means you can get your trailer riding exactly where it should.
If you’ve got both gooseneck and fifth-wheel trailers, you don’t have to swap out your entire hitch setup. This adapter replaces your gooseneck’s inner and outer tubes so your trailer couples directly to a fifth-wheel hitch instead of a ball. It’s a clean way to keep your equipment versatile without adding extra parts or complicated hardware.
The square inner tube (4") fits snugly inside the 4-1/2" outer tube for a tight, steady connection. A heavy set screw locks the inner tube in place after welding the outer tube to your trailer, creating a durable joint that holds up under demanding use. At 79.157 lbs, this adapter feels solid in hand—exactly what you want when hauling big loads.
You don’t need a pile of extra parts to get started. The adapter includes a heavy-duty load-bearing pin and a mounting plate measuring 9-7/8" long x 9-7/8" wide. With the major components ready to go, you can weld on the outer tube, lock in the inner section, and get back on the road faster.
Customer Satisfaction Score:
97% were satisfied with this product
3% of customers were not satisfied
Ratings & Reviews
Muy buena piesa
Nice part and service
Great product
Great quality welds worth the money
Excellent service
Its looks well built,its look tough
Works Great, Lot better then the one I had order from another online retailer and a lot cheaper. Thanks.
Your packaging was very poor. UPS had problems in handling it. They thought it was broken.
I rarely give an excellent review as I always feel there is room for improvement, but this service was excellent. I ordered this coupler on Monday and it arrived via UPS on Thursday. It is the correct part and appears to be excellent quality. I won't hesitate to use this company again and to recommend it to others.
Good products, great customer service
fast shipping
Very fast shipping !!!
Exactly what I needed. Great price and fast shipping.
Easy to use stout will use this on all my trailers Chris at e trailer was very helpful and professional
Great, strong, endurance product! Perfect everything!
I ordered a gooseneck hitch not a 5th wheel adapter!!!!!
Very rugged construction, gave me several options to adapt to my trailer. I had to modify it to fit my particular application but I have been using this trailer for a year and have had zero problems with the assembly. Approximately 30K miles on a trailer loaded to 26K lbs full time.
It's beefy, which is what I wanted.
Though I have to complain about the packaging.
It arrived in an enormous box, 5 times the size of the Hitch.
While there little chance of damaging this chunk of iron in shipping, one would want to believe the box would be commensurate with the actual size of the product. Too much waste in packaging/shipping, driving the price up.
I am actually of town but I will say that product showed up in a timely manner. It won't be used until spring as it is going on a trailer that I only use during the summer.
Works good fit the trailer I bought to replace the 2-5/16 hitch that was on it. I only use king pins on my farm.
I have a 3 car wedge trailer that I used every day. I had a lot of rocking with the gooseneck so I switched to this 5th wheel adapter. It definitely made a difference in stability. I’ve had no problems with it at all.
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