What is the Measurement from the Top of the Bolt Hole to Bottom of Cast Head Coupler w/ Jack Hole?
Updated 08/07/2025 | Published 07/11/2025
Question:
DM37ZR interested in buying but need to confirm the dimension of the hole top to bottom of the rail. The reason is, my A-frame trailer structure of rails is 3inch wide and L shape, not square tubing. See picture of what width I need one for bolt on. Thanks
asked by: Stephen N
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Expert Reply:
Hello Stephen,
I am always looking for a good excuse to stretch my legs (thank you), so I went out and got the measurement you requested, from the top of the bolt hole, to the bottle of the rail on the # DM37ZR is 1 9/16". I attached an image of the measurement as well, and also an image that a customer sent in that has the same style frame as you, he was able to get it bolted on.
What kind of trailer is this going on?
(click to enlarge)
(click to enlarge)
Product Page this Question was Asked From
Demco Cast Head Coupler w/ Jack Hole - eZ-Latch - 2" Ball - A-Frame - Bolt-On - 10K
- A-Frame Trailer Coupler
- Standard Coupler
- 50-Degree Frame
- Bolt-On
- 10000 lbs GTW
- 2 Inch Ball Coupler
- Auto Latch
- 2-1/4 Inch Hole
- Standard Grade
- Demco
more information >
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Kate F.
8/7/2025
Hey Stephen, How did the installation go with the coupler on your A-frame trailer? I'm curious to know if the measurement worked out for you and if everything fit as expected. Let me know how it turned out, as it could really help others with similar trailers!