bing tracking image
  1. Gooseneck and Fifth Wheel Adapters
  2. Demco
  3. Gooseneck Hitch to Fifth Wheel Trailer
  4. Connects to Gooseneck Hole
  5. Hitch Adapters
  6. Adapts Truck
Demco 5th Wheel Base Rails Adapter for B&W Turnoverball Gooseneck Hitches

Demco 5th Wheel Base Rails Adapter for B&W Turnoverball Gooseneck Hitches

Item # DM6140
lowest price pledge
Retail:$767.00
Our Price: $649.00
You Save: $118.00
Gooseneck and Fifth Wheel Adapters
This item qualifies for Free Shipping
Shipping Weight: 86 lbs
Quantity: 
In Stock
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

In Use/Installed

Customer Photos

Need help with installation?
Locate installers near me
Install this adapter in the ball hole of your B&W Turnoverball gooseneck hitch to get above-bed base rails for your fifth-wheel trailer hitch. Universal rails provide attachment points in your truck bed for a standard fifth-wheel hitch. 1-636-306-4830 to order Demco gooseneck and fifth wheel adapters part number DM6140 or order online at etrailer.com. Free expert support on all Demco products. Guaranteed Lowest Price and Fastest Shipping for Demco 5th Wheel Base Rails Adapter for B&W Turnoverball Gooseneck Hitches. Gooseneck and Fifth Wheel Adapters reviews from real customers.
  • All Info
  • Reviews (53)
  • Q & A (0)
  • Photos
  • Why etrailer?

Demco Gooseneck and Fifth Wheel Adapters - DM6140

  • Gooseneck Hitch to Fifth Wheel Trailer
  • Connects to Gooseneck Hole
  • Demco
  • Hitch Adapters
  • Adapts Truck
  • Fixed Height
  • No Offset

Install this adapter in the ball hole of your B&W Turnoverball gooseneck hitch to get above-bed base rails for your fifth-wheel trailer hitch. Universal rails provide attachment points in your truck bed for a standard fifth-wheel hitch.


Features:

  • Adapter mounts in your gooseneck trailer hitch to supply the above-bed base rails necessary for installing a 5th-wheel hitch
    • Works with B&W Turnoverball gooseneck trailer hitches
    • Compatible with Demco Hijacker Premier Series, B&W, Curt, Draw-Tite, Hidden Hitch, Husky, Reese, and Valley above-bed 5th-wheel trailer hitches
  • Adjustable mount allows for bed mats and liners
  • Fast, easy installation
    • Drop adapter into gooseneck ball hole and lock in place
  • Sturdy, black powder coated steel resists corrosion
  • Made in the USA
  • 5-Year limited warranty


Specs:

  • Gross towing weight: 21,000 lbs
  • Vertical load limit: 5,250 lbs


Notes:

  • Do not use this adapter with the Demco Hijacker Autoslide hitch or any other automatic sliding fifth-wheel trailer hitch.
  • Do not use this adapter with a B & W Patriot slider fifth-wheel hitch.
  • Demco Hijacker 5th-wheel hitches manufactured before 2012 do not fit industry standard universal rails.
  • When using this adapter, you may have to remove the safety chain loops from your gooseneck hitch if they are mounted front/back rather than side to side.


6140 Demco Base Rails w/ B&W Ball Adapter for 5th Wheel Trailer Hitches

Installation Details DM6140 Installation instructions




Customer Reviews

Demco 5th Wheel Base Rails Adapter for B&W Turnoverball Gooseneck Hitches - DM6140

Average Customer Rating:  4.8 out of 5 stars   (53 Customer Reviews)

Install this adapter in the ball hole of your B&W Turnoverball gooseneck hitch to get above-bed base rails for your fifth-wheel trailer hitch. Universal rails provide attachment points in your truck bed for a standard fifth-wheel hitch.

by:

I like this adapter. It drops right in to where my turn over ball goes, secures just like the turn over ball with one added bolt for extra security, and the the hitch mounts to it. It is easily removed so that I can still quickly utilize a goose neck with my turn over ball. I rate this model a 4 star as it only works with 2 widths of hitches. My original hitch did not work but bought one that did. The 2 sizes are relatively common sizes. I recommend this for those that do not want to remove their turn over ball hitches and want a quick and easy way to move from 5th wheel to gooseneck connection.




by:

Great customer service and quick delivery. Fits perfectly in my B&W turnover gooseneck hitch!


Comments
Perfect solution for me! Easy to install and remove when not needed. It doesnt move around when towing. Im very pleased with the performance and price.
Tim K - 09/15/2021


by:

Product had minimal set up, and works perfectly. As for etrailer staff, they are consistently great.


Comments
Sorry for delay in answering, my wife and I are very happy with product.
Patrick - 01/25/2022


by:

When my truck came with a gooseneck hitch, I didn't want to get an adapter for the trailer. This adapter fit perfectly and allows me to mount my fifth wheel hitch to the truck and remove it when I'm not using it. The hitch and adapter together are REALLY heavy; it'll take a forklift or 2 or 3 strong people to take it out.




by:

This is my second adapter. I tried the Curt X5 first and had problems with it fitting. But etrailer worked dilligently with me to find a solution. Ultimately refunding my money on the X5 and suggesting this Demco product. It fit and worked perfectly in my truck. Thanks etrailer for your help.


Comments
Perfectly. One of the best purchases and customer experiences I’ve had. Thanks you etrailer.
Jeff B - 12/21/2017



by:

This adapter plate when used with the B&W turnover ball hitch allows me to use a gooseneck trailer, fifth wheel trailer, and also use a truck camper. My original Fifth wheel bed rails were interfering with installation of a truck bed camper and this eliminates that problem. Installation is very fast and only requires torquing of the single center bolt after placing the adapter lug into the socket. I had zero problems installing this unit and it only takes about a minute to do. Also the paint job is very durable.




by:

It works great easy hook up and easy to install




by:

item was exactly as represented, fit as it should, delivered on time.


Comments
this is not a quick exchange if you need to remove and reinstall for each use, but the product has been good, works just as it should.
Stephen - 02/22/2022


by:

Fantastic product and fantastic service. I ordered on Monday and received at noon on Wednesday.




by:

Heavy and Built like a tank. One to three people will be needed in installing, one or two people to place in the flip over receiver and one person to pull the locking pin. Direct fit for the Demco Recon fifth wheel hitch.
Very well packed with all necessary parts securely attached to item.




by:

Robert in customer service answered my questions about the product and took my order. Arrived in 2 days as stated with no packaging issues. Had it installed in 30 minutes or less after reading instructions and them mounted 5th wheel hitch to it. Installation was straightforward. As there is a torque specs for adjustment/lock bolt I
suggest having torque wrench availiable for proper installation. Only reason for not giving a 5 star rating is have not pulled 5th wheel rv yet to see if it has any slack




by:

It fits the truck and my fifth wheel hitch fits in it perfectly. Great product.




by:

Fantastic customer service. Communication exceptional. Kept me informed about product, informed me that might be a delay in the original product ordered and suggested another like product that would ship sooner. Worked out perfectly. Would definitely recommend!




by:

This hitch mount is great! I can now swap over from my 5th wheel hitch to a gooseneck in minutes. This is a great product. I had a gooseneck hitch already installed in my pick up but needed to tow my 29 foot 5th wheel. I other mounts to install the 5the wheel to my 2013 Ram but the gooseneck hitch mount was in the way. Found this set up on line at etrailer.com . Fast shipping, Ez to get my order in. 100 % satisfied. Plug and play. Took less than 10 minutes to install.




by:

This product worked great. Used it in a 2016 Ram 2500 4x4 with the B&W turnover ball. The only problem is the safety chains for the B&W wont let this set flat against the bed of the truck. I solved this problem by using a heavy duty 1/4 inch rubber bed mat between the bed and this bracket and cut the rubber around the B&W hole and safety chains. That helped take up the extra space and helped to protect the spray in bed liner from being rubbed. Had no problems towing my fifth wheel and was happy I don't have these rails permanently mounted in my truck bed.




by:

I am fairly unhappy with the fact that I can not use this 5th wheel rail system with my b and w gooseneck chain hooks installed. I have to unbolt the chain hooks to get the rails flush in the bed. I specifically asked if this was compatible with my set up prior to order. Pretty upset that it turned out different than what I was told. The rails are nice, but I did not want to have to modify my set up each time I want to hook up a gooseneck trailer. Hopefully this will help others in their research.




by:

Quick and Easy to install holds up good just pulled my fithwheel back from Louisiana to the house in Alabama running 70/80 the whole way held up good no slack in it the only thing I wish was a lil deff is when I go from gooseneck ball to hitch I have to remove my safety chain loops out of my bed so it allows a flush mount but that’s about it overall a great product




by:

Very helpful very knowledgeable




by:

It works perfectly with my B&W turnover hitch and Reese 20k 5th wheel hitch.




by:

The adator I purchased is a great piece of engineering. Instalation was very easy. I am very happy with it so far. Have not towed my 5th wheel yet but will soon.
The only thing I can suggest to etrailer is the packaging. The cardboard box was broken open on one side and retaped. In a few places the paint was chipped off. I repainted the chips before installation so they will not rust.




by:

Fantastic product, perfect fit both in the turnover gooseneck and the rails for my plate , easy install but do wish they'd cut slots in for the safety chain u-bolts as I had to remove those to make it sit flush.




by:

I’ve had zero issue with this. It saved me from having to buy another style fifth wheel. Glad I bought it.




by:

The adapter works great, it alow me to pull gooseneck trailers and my fifth wheel and still have a totally flat floor to carry cargo in the bed.




by:

Rail system fit b&w gooseneck hitch perfectly, very satisfied with purchase




by:

Was just what I was looking for I have a b&w flip over ball and couldn't put rails I with it so I went with the dm6140 to solve my problem and it worked perfectly thank you so much



25
53
Show More Reviews

See what our Experts say about this Demco Gooseneck and Fifth Wheel Adapters





< Previous
123. . .5



Do you have a question about this Gooseneck and Fifth Wheel Adapter?




  • Why etrailer.com?

    At etrailer.com we guarantee:
  • Highest quality gooseneck and fifth wheel adapters for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate gooseneck and fifth wheel adapter information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Employee Jackie C
Expert Research:
Jackie C
Employee Mike L
Expert Research:
Mike L
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Conner L
Installed by:
Conner L
Employee Joshua S
Video Edited:
Joshua S
Employee Wilson B
Updated by:
Wilson B
Employee Hannah L
Updated by:
Hannah L
Employee Kristina F
Updated by:
Kristina F
Employee Noah M
Updated by:
Noah M
Employee Amanda M
Written by:
Amanda M
Employee Jonathan Y
Video by:
Jonathan Y

At etrailer.com 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.


Product Experts Available Now!
Call 1-636-306-4830