Factory holes in floorboard

[DanDweller]

Hello all, in prepping the subfloor of my Ford Transit Connect, I noticed it has several factory holes that were never plugged with anything, and are totally exposed to the outside.  I am wondering why it would have come from the factory like that, and what people use to plug them.  They are about 1/4"-1/2" in size.

 

[B and C]

They make rubber plugs to put in those holes: https://www.amazon.com/Piece-Flush-Mount-Black-Assortment/dp/B00PP7XU1E

Maybe someone at the dealer took them out (or PO). I doubt it left the factory that way.

 

[Reducto]

They're probably for seats or some other dealer option.

Glue pennies over them using Goop glue. Larger holes use quarters or find a suitable metal blank from the electrical conduit section at a hardware store.

 

[Doubleone]

Could also cover with peel-and-seal, or foil tape, and/or fill it with RTV silicone.

 

[Sunny1]

Hello all, in prepping the subfloor of my Ford Transit Connect, I noticed it has several factory holes that were never plugged with anything, and are totally exposed to the outside.  I am wondering why it would have come from the factory like that, and what people use to plug them.  They are about 1/4"-1/2" in size.

My 2013 came with rubber plugs in the holes.

 

[maki2]

Measure the holes and go to an auto parts store and get replacement plugs.