Hands-On with the Demco 50-Degree A-Frame Trailer Coupler w/ Jack Hole Video

The back of the Demco A-Frame Trailer Coupler item #12660-97SP is 10-3/8" wide. I have linked a diagram below I made along with a review video.

The Demco 50-Degree A-Frame Trailer Coupler w/ Jack Hole - eZ-Latch - Primed - 2-5/16" Ball - 21K #12660-97SP does not have any bolt information, with the reason being that this is a weld-on application and cannot be bolted on. I did cut out the…

The Brophy Safety Chain Mounting Bracket #MB58 does not have a specific weight capacity since the strength is going to be more reliant on the weld and material it is welded to rather than the part itself. I can tell you this is 5/8" diameter…

Since your trailer weighs around 2000lbs and can tow up to 7000lbs I recommend using two of the 30" Long Safety Chain with 7/16" S-Hook with Latch - 5,000 lbs - Qty 1 #TCTSCG30-730-04x1 which have a combined weight rating of 10000lbs which…

It would appear that that your 1978 Airstream had the standard 50 degree a-frame style coupler. You can verify this to ensure that the etrailer A-Frame Trailer Coupler #CA-5280-RB will fit correctly on your Airstream. I personally prefer the auto…

The trailer coupler latch repair kits are specific to the trailer coupler and not universal even if the hitch ball size is the same. Therefore, if you have the 12660-97SP, DM13203-52, DM13203-95, DM13205-52, DM13205-95, DM14040-52, DM14040-81,…

Thank you for the photos! It looks like Marvel used to be associated with Atwood and they went out of business a while ago. We have some similar coupler styles but I'm not seeing that any of our repair kits having the same design as your coupler…

Yes, you can replace your weld-on coupler with a bolt-on. You'll just need to drill the holes. Then, if you wanted to go back to a weld-on later that would be fine too. Just to confirm you can check with the trailer's manufacturer that…

The B&W Tow & Stow 2-Ball Mount #BWTS20037B referenced in your question features a 18,000 pound towing capacity when used with the 2-5/16 inch ball so it certainly has the capacity needed to tow a 13,500 pound trailer. This is designed to fit…

We currently have 3 different trailer jack support plates. I have included other dimensions in the included photos except for #BDSPB50 which was not available. #DL22763 is 1/8 inch thick. #BD003135 is 1/8 inch thick. #BDSPB50 is 1/8 inch thick. The…

I attached a picture that has the dimension of the #BDSPBQ50 that you referenced. I wasn't sure what other plate you were referring to so I grabbed dimensions for the #BD003135 and the #DL22763.

I would use a protractor, see photo, place the protractor on the edge of the inside of one side of the trailer frame and the other inside edge of the trailer frame should be parallel with the 50 degree line on the protractor. Another way to verify…