Name that boat trailer part

[Sparty047]

Bought a 1999 Genesis pontoon trailer.....built like a tank and not one speck of rust anywhere!

Tail lights needed an upgrade and a couple of side running lights did not work; so decided to pull new wires and change over to a 7way plug and water tight junction box.

All went well until I attempted to reinsert the plastic "plugs" that keep water out of the frame rails. One fractured! Not surprising with a 20+ year old plastic plug. Anyone know what this plug is even called? Inside it is inscribed Moss Plastic Parts and 100 x 50 (100mm x 50mm no doubt). I could literally whittle something to plug one rail but would rather replace it. Would help if I knew the part name!

Anyone with a clue?

.

 

[JimS123]

They really aren't water tight. They will eventually let some water inside the frame, and then not let it out.

Cover the wires with shrinkwrap sealer and leave the holes open. You'll be glad you did.

 

[Scott Danforth]

its called a vanity cover or a vanity plug.

if you want you could use one of these. https://www.mcmaster.com/tube-plugs...ular-plugs/?SrchEntryWebPart_InpBox=tube+plug

however as Jim mentioned, it will literally hold water in your frame and rust it out.

 

[Chris1956]

It is very hard to keep water out. Those plugs will likely trap water causing more harm. However, you do want chafe protection for the wiring.

There are plastic bushings that protect the wiring and allow the water to drain out.

 

[Sparty047]

Jim,Chris and Scott:
Thanks for the replies!!! "Snap-in Plug" and "rectangular snap-in plug are the winning correct terms. McMaster-Carr catalog also very informative. Found a 4 pack for $13 with free shipping here: ps://www.amazon.com/Pack-100-Snap-Rectangular-Plugs/dp/B07B69GW3D/ref=sr_1_2?dchild=1&keywords=rectangular+snap-in+plugs&qid=1616806947&sr=8-2

Each rail on this trailer has small "drain holes" on the underside, fore and aft, to allow water out. I did purchase "marine grade heat shrink wire butt connectors that each contain a ring of low heat solder at the center" to assure that all wiring is waterproof.

However, we'll be "trailering" the pontoon here and there and then storing it for days to weeks (and over the Winter) in the back yard. Besides excluding duck weed and other debris out at the boat launch, these plugs will also keep mice and squirrels from storing seeds, and possible chewing wiring while the trailer is parked.

Again, I am always amazed how the various forums always have knowledgeable members willing to share. Thanks. Peace/Out.