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  1. Folding Trailer Tongue
  2. Fulton
  3. Coupler Hinge Kit
  4. 3 x 4 Inch Tongue
  5. 7000 lbs GTW
  6. Bolt-On
Fulton Fold-Away Coupler Hinge Kit for 3" x 4" Tongue - Bolt On - Up to 7,000 lbs

Fulton Fold-Away Coupler Hinge Kit for 3" x 4" Tongue - Bolt On - Up to 7,000 lbs

Item # FHDPB340301
Our Price: $160.47
You Save: $81.56
Folding Trailer Tongue
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Shipping Weight: 13 lbs
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Use with actuators or standard couplers to create a foldaway tongue up to 48" long so that your trailer can be stored in even the smallest garage. Unique offset design guarantees superior performance. 1-833-496-1390 to order Fulton folding trailer tongue part number FHDPB340301 or order online at Free expert support on all Fulton products. Great prices and Fastest Shipping for Fulton Fold-Away Coupler Hinge Kit for 3" x 4" Tongue - Bolt On - Up to 7,000 lbs. Folding Trailer Tongue reviews from real customers.
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Fulton Folding Trailer Tongue - FHDPB340301

  • Coupler Hinge Kit
  • 3 x 4 Inch Tongue
  • 7000 lbs GTW
  • Bolt-On
  • Fulton
  • Up to 48 Inch Long

Use with actuators or standard couplers to create a foldaway tongue up to 48" long so that your trailer can be stored in even the smallest garage. Unique offset design guarantees superior performance.


  • Hinge kit lets you create up to a 48" foldaway tongue for your trailer
    • Designed to be used with actuators or standard couplers
  • Bolt-on installation
  • Sturdy steel construction
  • Corrosion-resistant, Z-max 600 zinc finish
  • Mounting hardware, pivot bolt and pivot pin and clip included
  • Not for use on aluminum trailer frames


  • Application: 3" x 4" trailer tongue
    • Trailer tongue material thickness must be between.188" and.120"
  • Capacity: up to 7,500 lbs (see table)
  • 5-Year limited warranty

Use the table below to determine your maximum pivot length based on your trailer capacity. Pivot length is the measurement from the center line of the coupler ball to the farthest pivot hole.


Hinge Kit Maximum Pivot Table

HDPB340301 Fulton High Performance Bolt-On, Fold-Away Hinge Kit for 3" x 4" Trailer Tongue

Installation Details FHDPB340301 Installation instructions

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Fulton Fold-Away Coupler Hinge Kit for 3" x 4" Tongue - Bolt On - Up to 7,000 lbs - FHDPB340301

Average Customer Rating:  4.8 out of 5 stars   (765 Customer Reviews)

Use with actuators or standard couplers to create a foldaway tongue up to 48" long so that your trailer can be stored in even the smallest garage. Unique offset design guarantees superior performance.


Pretty easy to install if you have the right tools. Boat now fits in garage without needing to be at an angle and in the perfect spot. Picture is before I got the new safety chains and wiring installed. Make sure to get loom to protect the wire at the joint and possibly upgrade wire quality. I went with Wesbar 787268 and a braided wrap.


Watched a good video before I started-make sure you have good drills (16 holes)
I used a 1/4-3/8 then the 1/2 I think that helped alot. One thing I would receommend of the manufacturer that they mark the "trailer" portion of the swimg away and the "tongue" portion I was a little confused on that.
I am very happy with the results was able to get my old boat into a shed it previously was too long for I was able to shorten the tongue approx 32".
The Etrailer folks were top notch with their service and ability to answer any questions I had. I only have one pic of the folded up tongue attached


This Fulton Fold-Away Coupler Hinge Kit saved our bacon!!! Our boat can now fit in a smaller(and available) storage unit, saving time and money. The install is easy. Thank you!!


Awesome product to update trailer for hinged tounge easy bolt on instructions done in less than an hour


Excellent service on my order with missing parts.


I purchase items on the internet frequently. I would say that etrailer should be rated one of the highest rated websites. The product purchased was high quality, clear instructions that made the installation easy, on time delivery and, of course, the product was exactly as described on etrailer website. The trailer now fit in my garage.

The product has worked out great. Several friends commented and may have ordered one for themselves.
Victor - 06/02/2017


My son purchased this product which I installed on my EZ Loader trailer. Took a few hours but I like a project. Its been great, allowing me to easily park my boat in the garage with room to spare. Just wish I had installed it earlier. When I installed, I also replaced my brakes (the entire brake plate, etc), bled the brake line and installed the flex line needed for the swing. Got all the accessories from etrailer. Great service and just recently ordered some lights as well.


We ordered this product for our boat trailer. My husband us extremely happy with it and recommends it to anyone with storage space issues. We are now able to park our boat in our driveway instead of storing it off site and paying winter storage fees.


What a great product! And it's made in the U.S.A. Excellent quality, just as you would expect from an American made product. Fit & finish are very good, and the instructions were well detailed and easy to follow. Kit was complete with special tools needed for installation, and was not missing any parts. Took a little under 4 hours, and that included time to relocate trailer tongue jack to a new location. Looks like it was factory installed, and was considerably cheaper than adding 3" to the back of my barn. Now I can just fold the tongue (shortens trailer by 27 inches) and close both the front and rear barn doors. As the photos show, all that's left is to add the new, longer safety chains. Thanks for a great solution to my problem.


I ordered a trailer part and several days later realized I had ordered the wrong part. I panicked and called etrailer and spoke to Carol. Lucky for me she found my order and replaced it with the correct part. Carol was super nice and understanding!


Your product was a tremendous package. The trailer I installed it on carries a 1976 Cobalt 19DV that I have owned since new. The trailer is a Calkins single axle 4000lbGW. I have paid over 15K in storage fees for the over 37 years I have owned this boat. I wasn't aware of a product like this until I happened to see a trailer at a Bass Pro Shop in Branson MO while on a vacation trip. The trailer had a swing tongue not your product but it got me thinking and after returning home I found your product on the internet. Can't believe how great the application fit and the ease of installation(after drilling holes of course). I have on single car garage that I tried to store the boat in but the tongue was to long to be able to close the door. After this installation the trailer fits perfect. Great product would recommend to anyone.


Haven't put it on yet, maybe this week. I purchased a new boat April 1st of last year, knowing that I would need the coupler hinge kit to garage store it. The boat is in the garage, but I had to cut the tongue off to be able to shut the overhead door. Now I can install the coupler just in time for boating season. I knew the problem wasn't etrailer's making.


I’ve had this installed one year, and used it in salt water twice and freshwater twice, and rinsed with a hose after each use. Other than that it has sat uncovered in my driveway, and already it’s rusting very heavily. The trailer and bunks are all galvanized steel, and all older than the folding coupler, and none of them have corroded under the same conditions. For what this product costs, I’m pretty disappointed because it looks awful and now that it’s rusting, there’s not a ton you can do with it to stop it. To effectively paint it, I’d have to remove it from the trailer to get paint on all sides. I built a similar hinge for my last boar and fabricated the hinge myself with a mig welder and steel and I purposefully spent a lot on this coupler because of the galvanizing, but it’s rusting about as fast as the painted steel one did.

Other than the rust, it does work the way it’s supposed to. It’s definitely got more slop in it now after not much use than it did when it was installed. It requires a lot of large drill holes to install, which is a real pain in the butt, but I guess that’s what makes it secure. I don’t think I’d buy it again based on the rust. At the very least, paint it with several coats of rust preventative paint before you install it.


Fast reply’s and prompt shipping!! Will definitely purchase from Etrailer again! Thanks for the great service!


Love this, won’t have a boat without it. Pretty easy to install(1-1.5 hrs to install).


Excellent product. They were extremely helpful in getting this ordered --'real' friendly people. All hardware, plus a centering punch and torx bit to hold the fasteners were provided. Thank you much.


Great product, built very strong, took me a couple hours to install, it would have gone faster had I a better quality 1/2" drill bit! Fit and finish is excellent, it's nice the torx and center punch are included. Saved me 20" making it easily fit in the garage!


Just what I was looking for. Gives me a little extra needed space.


Worked great easy install


Bought this to fit my new-to-me boat in my garage. Installed very easily and it helps to have a second set of hands. As others have mentioned, it does have a little play up and down, but it's nothing noticeable when towing. The coupler pin sits pretty snug and there isn't any play in mine.


excellent product in fact I just ordered another for another trailer installation is straightforward and very easyexcellent price thanks again William


Good product and great service from etr ailer


Very well made High Quality item. The size was exact to spec with easy to follow instructions. My garage was a bit short so the hinge enables me to accommodate my double-axel trailer pulling a 23 ft boat that weighs ~4k lbs. The boat yard guys are impressed and so am I. I highly recommend.


I have a pontoon boat, I have had a problem launching my boat, having to put
the tow vehicle to far out in the water, I was looking for a way to extend my trailer tongue a couple of feet, I saw an ad for the Fulton coupler, I ordered a unit from
etrailer, free shipping and delivered on time, plus was surprised to see the quality construction of the product, would recommend the product and the service of this company.
Lonnie S.

thanks for the inquiry, very satisfied with the product, and service from the friendly etrailer staff.
Lonnie S - 03/27/2018


This coupler has been awesome, I did decide to weld this coupler instead of bolt it on. Its holding up great and saves a ton of room. Very happy with it.

Show More Reviews

See what our Experts say about this Fulton Folding Trailer Tongue

  • Does Fulton Fold-Away Coupler Hinge Kit for 3 x 4 Tongue Come With Transfer Punch
    A transfer punch is not included with the Fulton Fold-Away Coupler Hinge Kit # FHDPB340301. The hinge kit comes with mounting hardware, a pivot bolt, and pivot pin and clip. I have added a link below to the installation instructions for you to check out as well of this hinge kit.
    view full answer...
  • Install Video for Fulton Fold-Away Coupler Hinge Kit
    I attached an install video for a similar hinge kit as the # FHDPB340301 for you to check out. You'll see the entire process like you are asking about from the cutting of the frame to drilling and bolting in the new hardware.
    view full answer...
    Image 1 for
  • Can Fulton Fold-Away Coupler Hinge Kit be Used on Pontoon Trailer and Capacity When Cut to 36 inch
    As long as your trailer has a 3x4 inch trailer tongue the hinge kit part # FHDPB340301 will fit and work well. When using the hinge at the 36 inch length the capacity would be 6,000 lb total trailer weigh and 600 lb tongue weight.
    view full answer...
  • Coupler Hinge Kit for a Trailer with a 3 inch by 4 inch Frame
    We do have a hinge kit that fits a 3 x 4 inch trailer tongue with the part # FHDPB340301. We don't have the channel you'd need but you could source that locally at a hardware store.
    view full answer...
  • How Much Up and Down Play Is Normal With Fulton Fold-Away Coupler Hinge Kit FHDPB340301?
    With the Fulton Fold-Away Coupler Hinge Kit for 3" x 4" Tongue - Bolt On - Up to 7,000 lbs # FHDPB340301 installed you will get some up and down movement. Typically this should not exceed about 5 degrees, or 1-1/2" with tongue at the longest length of 48". The shorter the tongue the less play you will notice. There is play due clearances needed to allow the hinge to be able to open and close without getting stuck. I included a video of the # FHDPB340301 for you to take a look at.
    view full answer...
  • Can Fulton FHDPB340301 Fold Away Coupler Hinge Kit Be Welded Instead of Bolted
    I checked with my contact in the Tech services department at Fulton, who tells me that it is indeed acceptable to install the # FHDPB340301 fold-away coupler hinge by welding instead of bolting. If your trailer tongue is galvanized, be sure to install it in a well ventilated area as welding on galvanized metal can give off toxic fumes. I've linked you to a product description video for the # FHDPB340301 fold-away hinge.
    view full answer...
  • Is There a Difference Between Fulton FHDPB340301 And HDPB340101
    There is no difference other than part number between the HDPB340101 and the Fulton Fold-Away Coupler Hinge Kit for 3" x 4" Tongue # FHDPB340301. We only offer the # FHDPB340301, but each bolt onto 3" x 4" trailer tongues (steel tongues only) and have a 7,500 lb capacity.
    view full answer...
  • Replacement Mounting Hardware For Fulton Fold-Away Trailer Coupler Hinge
    The only way we have the mounting bolts that you are looking for is with the Fulton Fold-Away Coupler Hinge Kit # FHDPB340301 for 3"x4" trailer pole tongues or # FHDPB330301 for 3"x3" trailer pole tongues. You may be able to find the hardware from a local specialty hardware store. Be sure to get grade 5 bolts for the strength rating.
    view full answer...
  • Availability of Coupler Hinge Kit that Could Fit 2003 EZ Loader Trailer
    We do have coupler hinge kits available but what your 2003 EZ Loader trailer would need depends on the dimensions of your trailer's tongue. The part # FHDPB330301 is for 3 inch by 3 inch tongues, the part # FHDPB350101 is for 3 inch by 5 inch tongues, and part # FHDPB340301 is for 3 inch by 4 inch. So you'd have to measure your tongue to see which option would work best for you.
    view full answer...
  • Can a Fold-Away Coupler Hinge Kit Be Used To Extend A Trailer Tongue?
    Yes, you will be able to add the Fulton Fold-Away Coupler Hinge Kit to your boat trailer to gain some additional length out of the trailer. We have the hinge kit in different sizes to match your trailer tongue. It appears you will need the 3"X5" # FHDPB350101. We also have a 3"X4" # FHDPB340301 and 3"X3" # FHDPB330301. You will need to source the additional trailer tongue material from a local supplier in the length you are needing.
    view full answer...
    Image 1 for
  • Swing-Away Tongue For Aluminum Trailer With Galvanized Steel Tongue
    For your aluminum trailer with a galvanized steel tongue (swing-away tongues cannot be used on aluminum tongues), you'll need a die-cast steel tongue with a zinc finish from Fulton. The correct fit is going to depend on the size of your trailer tongue, as well as the thickness of the material of your current tongue, which must have a thickness between 0.188" and 0.120". If your trailer tongue's material thickness meets that requirement you can choose from the following, based on your...
    view full answer...
  • Inside Dimensions of Fulton FHDPW330300 Fold-Away Trailer Coupler Hinge
    The Fulton # FHDPW330300 fold away coupler hinge is designed to slide over a 3 x 3 inch trailer tongue, so the inside dimension is just slightly larger than 3 x 3. To install, you'd cut the trailer tongue at the point where you'd like it to fold, slide the hinge over the tube and weld it into place. The hinges aren't intended for use on aluminum trailer frames. Fulton also makes bolt on hinges for a 3 x 4 tube, part # FHDPB340301 or 3 x 5 tubes, part # FHDPB350101. I've linked to a product...
    view full answer...
  • Availability Of Fold-Away Coupler Hinge Kit For 1999 Four Winns 190 Horizon
    We do have folding tongue adapters that will fit the tongue of your 1999 Four Winns 190 Horizon, but unfortunately the only way to determine the dimensions of the tongue is going to be by measuring it as we do not have that information and I was unable to find it. Your trailer will more than likely either have a 3" x 3" tongue and would need the Fulton Fold-Away Coupler Hinge Kit for 3" x 3" Tongue - Bolt On - Up to 5,000 lbs # FHDPB330301, or will have a 3" x 4" tongue as you mentioned...
    view full answer...
  • Can the Fulton Fold-Away Coupler Hinge Kit Rust Over Time
    The Replacement Pivot Pin for Fulton Coupler Hinge Kits part # F500336 like the Fulton Fold-Away Coupler Hinge Kit part # FHDPB340301 is designed for boat trailers that frequent salt water so there will be no issues with rust. The hardware and brackets are all zinc coated so as long you don't wear through the coating there will be no rust issues. I have attached a review video I did on the Fulton Fold-Away Coupler Hinge Kit below as well.
    view full answer...
  • Needing A Fold-Away Coupler For A 3" X 4" Trailer Frame
    The Fulton Fold-Away Coupler Hinge Kit for 3" x 4" Tongue - Bolt On - Up to 7,000 lbs. part # FHDPB340301, is a fold away coupler hinge for a 3" X 4" trailer frame. I have included a product description link and a video installation link below.
    view full answer...
  • Replacement Surge Brake Actuator For Trailer W/ Older Swing Away Actuator For Disc Brakes
    Thank you for the pictures! For a replacement option I recommend the Dexter DX7.5L A-60 Brake Actuator w Electric Lockout - Bolt On - Disc - 2" Ball - Zinc - 7.5K # DX29FR to replace your current actuator. The # DX29FR has a 7500lb trailer weight rating, is designed for trailers with disc brakes, and is a bolt on replacement. You will likely also need a replacement swing away tongue adapter like the Fulton Fold-Away Coupler Hinge Kit for 3" x 4" Tongue # FHDPB340301 which fits 3" x 4"...
    view full answer...
  • Replacement Actuator for ACT-7.5K Disc Brake Actuator
    For a replacement option I recommend the Dexter DX7.5L A-60 Brake Actuator w Electric Lockout - Bolt On - Disc - 2" Ball - Zinc - 7.5K # DX29FR. The swing-away actuator you are referencing was discontinued and there is no direct replacement. The # DX29FR has a 7,500 lb trailer capacity, is designed for trailers with disc brakes, and is a bolt on replacement. More than likely you will also need a replacement swing away tongue adapter like the Fulton Fold-Away Coupler Hinge Kit for 3" x...
    view full answer...
  • How To Make Boat Trailer Tongue Shorter To Fit In A Garage
    I would be happy to help! Personally I would go with the Fulton Fold-Away Coupler Hinge Kit for 3" x 4" Tongue - Bolt On - Up to 7,000 lbs # FHDPB340301 since you are only adding 12" of pivot length. At that length you will still have the full weight rating of the coupler so it will be plenty strong for your trailer, but will also allow you to make the trailer as short as possible to fit in your garage or any other tight places. While using the Reese Ball Mount # 80232 and installing...
    view full answer...
  • Parts Needed To Replace Folding Tongue TieDown Engineering 70LC Surge Brake Actuator On Boat Trailer
    I would be happy to help! Based on the pictures you provided your trailer uses the discontinued Tie Down Engineering 70LC, and we will need to get a bit creative on a replacement as there is not a direct replacement available. What you will need to do is use the a folding tongue kit like the Fulton Fold-Away Coupler Hinge Kit for 3" x 4" Tongue - Bolt On - Up to 7,000 lbs # FHDPB340301, but you will first need to measure the size of your trailer tongue. If you have a 3" x 4" coupler this...
    view full answer...
    Image 1 for Image 2 for
  • Replacement Fold Away Surge Brake Coupler for Disc Brake Trailer
    I do have a recommendation as Titan no longer makes their brake actuator with the fold away tongue hinge you are looking for. You will be able to use either a 3"x4" Hinge # FHDPB340301 with the Dexter DX7.5L A-60 Brake Actuator # DX29FR. Or we have the 3"x5" Hinge # FHDPB350101 with the Dexter DX7.5L A-60 Brake Actuator # DX56FR. You will need to acquire a short leg of either the 3"x4" or 3"x5" tubing for connecting the hinge kit to the actuator.
    view full answer...
  • Availability Of Hitch Extender Compatible With Trailer Hitch Receiver For 2020 Ford Fusion
    There is a Class III Hitch available for your new 2020 Ford Fusion, the EcoHitch Hidden Trailer Hitch Receiver # 306-X7239. This hitch has a 525lb tongue weight rating and a 3500lb trailer weight rating so it will have a plenty high rating for your light weight 4' x 8' trailer, though you will want to check the towing section of your owner's manual to find your vehicles towing capacity and use the lower rating between the vehicle and hitch. With this receiver you would be able to use...
    view full answer...
  • Parts to Convert From 12 Inch Hydraulic to Electric Trailer Brakes
    Thanks so much for the photos as they were very helpful; they show your trailer's drums are 12 inches in diameter, and that you do have a 5-bolt brake mounting flange. To switch from hydraulic to electric trailer brakes you are correct you would be able to use your current coupler as well as drums, and we do have the parts needed for you to switch, which are the following: - Electric Trailer Brake Kit - Self-Adjusting - 12" - Left and Right Hand Assemblies - 5.2K to 7K # AKEBRK-7-SA -...
    view full answer...
    Image 1 for Image 2 for

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Notes: May have damaged packaging or minor cosmetic blemishes.

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