Flat rear diff drain plug?

I want to replace my rear diff drain plug with something that will sit flush but I'm having a hard time finding the right size. I have been searching the internet and called a few places but can't seem to find it. Any suggestions on where to find this. I went to Napa Auto Parts and he could not help me but told me the size was 5/8/24 thread. Any suggestions? Hello is a picture of what I am kind of looking for.
The reason for this is that I have a rear diff skid from BAMF which offers the best ground clearance for a diff skid but the drain hole is unprotected and I can see it getting scraped down more and more. I want to put in a low profile drain plug then grind the protective ring on the diff down and then weld a solid plate over the hole that way it is completely protected.

 

I understand what you are trying to say. I think that is a lot of effort and work for it though. Do you rock crawfish a lot? Going over mud, sand, snow, even wooden logs seems like the difference would be negligible with the exception of maybe rock crawling.

That being said it sounds like it will help make the underside of your truck all but bullet proof. Good luck with your mod! Finished pictures would be cool to see!

 

Not really possible to have the plug flush with the housing because it's not a tapered plug like a pipe plug, it has to seal on the face of the hole it screws into. That's why it has the protective ring around it.

 

Not a welder or offroader but would it be possible to have someone weld a thick bead all around the drain plug hole on the skid plate? Basically just putting a large lip around the bolt hole.
Edit - heck your ok with welding a plate over that hole, how about a welder making a slightly domed plate over the existing bolt hole? No idea how practical that would be.

 

The drain plug can take direct bashing on rocks with no damage. Some rock crawlers change to a flanged allen socket drain plug, on the odd chance a corner of the OEM plug may catch on a rock and rotate to loosen:

Trail-Gear P/N 140032-1-KIT allen socket magnetic drain plug

^I use this one and the magnet is stronger than OEM, so it catches more debris. Don't be alarmed when you change diff oil lol.

 

I thought about that as well I think that would work but it would still be something extra to get dragged on rock. That's what this is for it's dragging the rear diff on the rocks.

So the diff drain plug that is on my truck now won't wear down if I start dragging it? The protective ring has worn down flush with the drain plug. It's actually kind of hard to get a socket on the plug right now.
Thanks for the link to the other plug. That looks good.

 

I replaced the drain plug with this one from Summit racing. I like this better than dragging the stock plug. I'm going to see how this does for a while and if I continue to wear the protective ring down then I will weld something over the hole