Replacement Plugs For Demco Underbed Rail System DM8551010

Updated 08/26/2025 | Published 08/24/2025

Products Featured in This Question

Underbed Rail and Installation Kit for Demco UMS 5th Wheel and Gooseneck Trailer Hitches

(14)

$479.45

Replacement Cap Plug for Demco 5th Wheel Hitch Installation Kit

(16)

$7.13

Question:

I bought a Demco Autoslide 21K 5th wheel hitch from ETrailer a few years ago. I installed it myself with the under bed frame bracket kit. The plastic plugs to cover the holes in the bed when the hitch is out werent that good to start with but they are completely usless and broken now. Do you have anything maybe made out of rubber to cover the holes?

asked by: Dewayne H

Expert Reply:

Hello again Dewayne!

I looked around our site, but it looks like the only thing we have is the direct replacement plugs # DM14335. Everything else was either the wrong shape or wrong size. This is a 2" plug though, so you may be able to find something at a local hardware store that could work and be a bit more flexible.

Sorry I don't have a better option for you.

expert reply by: Lazer S