Pin Lock For Demco Cast Head Coupler DM37ZR
Updated 05/02/2023 | Published 04/30/2023 >
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Question:
Is there a way to lock the trailer to the tow vehicle ball with a Demco A-Frame cast head or standard head coupler? I dont see a pin hole for which to a lock.
asked by: David G
Expert Reply:
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
Not only is this lock made for this coupler, but it is also extremely strong, with a tested shear strength of 42,000 lbs.

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
- Bolt-On
- 10000 lbs GTW
- 2 Inch Ball Coupler
- Auto Latch
- Demco
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