What Size Bolts Should Be Used To Install The Demco DM14793-81 Coupler?

Question

Question:

Do you know what bolt size and the bolt length? What is torque pound to tighten?

asked by: Daniel

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Expert Reply:

The mounting holes on the Demco A-Frame Trailer Coupler # DM14793-81 are all going to be 1/2", so you will want to use grade 5 or higher 1/2" bolts. The length will depend on the thickness of the frame you are attaching this to and the torque spec will depend on the bolt you end up going with. I know this is a fairly vague answer, but there can be a lot of variables with torque specs depending on the bolt. These rating should be listed on the bolts you end up going with though.

expert reply by: Lazer S

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Answer 1

The two bolts used to secure a coupler like the Bulldog Cast Head Coupler part #BDA200C0317 to a channel like the Bulldog 3-Position Adjustable Channel Bracket part #BDAC3000300 are 5/8" diameter x 5" long. They do come with the coupler or…

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Answer 2

The Grade 8 mounting bolts that come with the Trailer Coupler #CTA-280 have a 5/8" diameter and an overall length of 5-1/8" including the head. Without the head of the bolts they measured 4-13/16".

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Answer 3

I recommend using Grade 5 1/2" x 4" bolts to install the Demco Channel Tongue Trailer Coupler part #DM12717. These would allow for the full weight capacity of the coupler to be achieved. These can be picked up at most local hardware…

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Answer 4

Speed is a huge issue with trailer tires actually. Unless otherwise noted trailer tires are rated as 65 miles per hour as their max speed. Exceeding the speed rating will cause the tire to heat up and fail easier. We do have a couple brands that have…

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Answer 5

There is indeed a pin lock for the Demco Cast Head Coupler w/ Jack Hole - eZ-Latch - 2" Ball #DM37ZR. In fact, there is one made specifically for this coupler, from InfiniteRule: - InfiniteRule Lock for Demco eZ-Latch Trailer Couplers #IR66FR…

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Answer 6

Fulton does not carry a repair kit for your 2" ball coupler. I recommend replacing your coupler with one easier to use like the Demco A-Frame Trailer Coupler #DM14793-81. This coupler can be bolted on and if the coupler latch wears our it can be…

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Answer 7

Yes, if you wanted to weld on the Demco coupler part #DM37ZR instead of bolting it on you certainly could. This is powdercoated though so you will need to remove the powdercoating first. For a similar coupler that was designed to be welded on and…

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Answer 8

Hey Mike, thanks for reaching out! I mean you can technically install the Curt QuickPin No-Latch Trailer Coupler #C22CR on an A-Frame but you're looking at some pretty heavy modifications and you'll need to hire out a professional welder for…

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Answer 9

Yes, you can so long as your Demco EZ latch coupler is cast like item #DM14040-81 or item #DM37ZR. The InfiniteRule Lock for Demco eZ-Latch Trailer Couplers item #IR66FR works great with these couplers whether they're being towed or parked.

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Answer 10

Hey Kenneth, yes basically all couplers that were designed to be bolted on can be welded on.

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Answer 11

The only differences between the Demco eZ-Latch Couplers #DM37ZR and #DM14793-81 is that the former has integrated loop holes for installing safety chains and a about a 2" drop while the latter doesn't come with provisions for attaching the…

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Answer 12

Thank you for the image of your setup Steve. I do not know what the manufacturer was thinking when they welded in the Demco Actuator on your boat trailer. With how it was installed there is no way for you to access that rear pin without drilling a…

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What Size Bolts Should Be Used To Install The Demco DM14793-81 Coupler?

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