What do these do?

Was under my truck and noticed these plugs had rust around them. Am I correct in assuming these are plugs or drain holes? The inner caveman in me couldn't resist putting a flathead to one and twisting (so I broke one off). Figured they were coming out anyhow so I can sand this off and paint it. Just trying to figure out a part number and educate myself on the purpose of those holes.

 

Ya pic didn't load.


/now it did. Lol.

 

If it can be found.
It’s likely here
https://www.tacomaworld.com/threads...ams-and-part-numbers-with-list-prices.347123/

 

Screws plugging the threaded holes where running boards mount.

 

They rust?

 

See the drain channels in the pinch seam at the bottom of the rocker panel? I put the little red tube of the lubricant of my choice up in there and hose up into the rockers at least once per year. I used WD-40 on my old T-100 for years and the rockers and cab corners were solid when I sold it.

That should get a little lube up in there if you don't want to take them out. Just know that they will drip for a few days.