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If you need to pull your gooseneck trailer with a fifth wheel hitch, this inner tube makes the swap simple. It replaces your existing gooseneck coupler tube and gives you a standard 2" king pin connection, so you can hook up right to a fifth wheel hitch. The square inner tube fits standard 4" outer tubes, making it an easy drop-in upgrade for mixed towing setups.
When you’re hauling serious weight, this adapter is built to hold up. It’s rated for 30,000 lbs gross towing weight, letting you move heavy equipment or large trailers with confidence. The sturdy steel construction and heavy-duty design deliver peace of mind every time you hitch up.
You can dial in your setup for a level ride thanks to the 8" range of vertical adjustment. The holes are spaced 2-11/16" apart on center, and the pin hole diameter is 13/16". From the plate to the top adjustment hole there’s 15" of length, giving you flexibility to fine-tune your trailer height for proper clearance and weight balance.
The welded 10" x 10" plate, 2.36" gussets, and .354" skid plate thickness give this coupler its solid feel. It’s compliant with SAE J2638 standards, so it meets performance and safety specs for heavy-duty towing gear. Weighing 54 lbs, this piece is made to handle years of tough use without flex or fatigue.
This adapter uses a standard 2" diameter king pin, so it works with most fifth wheel hitches and even many commercial setups. You can also add a universal capture plate like the Pullrite 3317 if your hitch requires it. For anyone who needs to tow a gooseneck trailer behind a fifth wheel setup, this coupler tube delivers straightforward connection and reliable performance.
Customer Satisfaction Score:
97% were satisfied with this product
3% of customers were not satisfied
Ratings & Reviews
Shipping was faster than they predicted and I like that as a business owner. The part does come as they say bare metal but with about an hour of a grinder and some paint, it turned out pretty good. The welds look professional and beefy and should last the lifetime of my 40ft flat deck trailer.
It fit as designed. But it would have been nice if the company that made it cared about looks as much as they do function. Mine had welding splatter and welding wire still hanging off it.
Very heavy duty and built great. Best Ive purchased yet. I sale Trailers and have had to get these for many customers from different companies and by far this is the best. Thanks
Excellent quality of materials and welding! Braces were a great feature! The holes are too small and will have to be drilled out before I can use the hitch!
Worked as advertised howler on our trailer we had to shorten the adapter by 5 inches to get out trailer to the right height. Works great!
Fit and function is great. Item is as described. I’m completely disappointed in the finish quality. They didn’t even bother to remove any welding soot nor splatter and definitely no paint. Hitch is covered in surface rust. The welds were burned in hot but did not wrap the gussets left holes in ones corner and a
large weld droplet. No pride taken in the work. Packaging was poor with multiple holes torn in the oversized box with on piece of packaging paper that was supposed to protect this 40 pound hitch.
Super fast shipping, product is good quality. My first experience with etrailer wasn’t good & I was skeptical about ordering from them again but they did good on this order
Box was destroyed due to shipping with the USPS, but heavy pce, so its was expected. HItch was as expected, satisfied.
I bought this gooseneck to fifth wheel hitch to make easier hook up and not have to change hitch on truck. I have already installed it sure makes hooking trailer easier and pulling the trailer is more reactive than before. I am totally happy with the product.
Comes as Raw metal. Buy a couple cans of primer and paint. Welds on this are very nice and heavy duty. Shipping was very fast ordered Friday and was here Monday afternoon.
Very stout and well built product !!
I've been a customer of etrailer for several years now and have always been pleased with their excellent products and service. I recently purchased a gooseneck to fifth wheel square steel trailer coupler inner tube adapter rated at 30,000 lbs and am very pleased with it's quality and received it within a few days of my order and imediately put the adapter to use.
We've put over 70k miles on the trailer since installing the 5th wheel neck. No issues ever, great fit. We put a small amount of grease on ball at connection, to keep everything nice and lubed. I recommend the hitch, and have always been very pleased with Etrailer.com
The 5th wheel trailer coupler adapter works very well. It's strong, solid, and we'll made. Highly recommend!
Daniel
8/29/2024
The 5th wheel coupler adapter works outstandingly! Very strong, no problems with it. Highly recommend!
Awesome service
Not fully welded very disappointing
The goose neck to 5th wheel hitch is well made. The problem it solves for me is I do not have to change hitches on my truck for we pull a 5th wheel camper all so. I will be using it on a 20 foot flat bed trailer. Had a problem with the order called customer service and it was taken care of right a way.Very friendly people to deal with.
Norman A.
7/22/2017
It is working very well
Great product
Great. Product
Excellent shipping, excellent product! Would recommend
Exact fit, works as intended
The neck pulls great, and locks right into its coupler. And handles the weights I put on it hauling hot shot.
Product is well built. It arrived on time, only used it once.I think is going to last as long as my trailer will. Just ordered another one for different trailer that had the square tubing.
Do you have a question about this 5th Wheel Gooseneck Adapter?
Info for this part was:
At etrailer we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.
Katrina D.
12/16/2023
These Coupler adapters are bare metal. Since there is no coating, it is susceptible to rusting. You can clean off the rust by using some vinegar and coating the hitch generously. Then you can ball up some aluminum foil and begin scrubbing the hitch ball. This will scrape off any rust and polish the material. Once you have that cleaned off, then you can use a rust oleum type of paint to cover the adapter to prevent any future rust issues.