Old water heater drain

I put a new washer in it. I think its leaking where it swivels on the stem part of it.
I apologize for the pic size, just wanted to give good images so people could see what I'm talking about. I can take them down if necessary. Can you elaborate when you say you cant scroll to see other posts? I can scroll to the right and see mine and everyone else's post text. Are you using a phone? Im on my desktop. I dont know if I can make them smaller now. Ive closed the windows to the image host site and dont think I can get back to it. Would have to take them down and reupload them.
What was the point of adding this connector in here and removing the 1/2" plug. It was a pain to try and hold the metal part from spinning while trying to screw in the plastic plug. Having the original plug would seem to have been much easier.
One more thing, does anyone know what kind of tank is in this water heater, aluminum or steel? Just want to know if i should try to get an anode for it. And also was wondering, on the steel tanks, if they are glass lined why do they corrode and need an anode rod?
Sorry, a lot of questions and info in one post. Tried to make paragraphs to separate it.
Thanks everyone

BTW, make the images smaller, I can't even scroll to see all of the print in other posts.

The garden hose fitting replaced the original plug. I have a Model Temp heater with a valve, same difference. The water hose fitting can be removed, if you desire to do it. The leaking may be caused by a bad hose washer. If you want to turn it out of the heater, a basin wrench may be the best tool.

Great photos!
Looks like someone over the years has screwed a water hoce adapter into the 1/2 inch pipe opening in the tank.
You could try removing burner tube, remove plug and try a large easy out to remove the adapter.

It is an American water heater, model RV-6

It doesnt look like it was added on by a previous owner and from looking at I'm not sure how to take it off. It looks like the sheet metal is behind the flange of the connection. I was hoping I could take the back cover off and slide the unit out of the case so I could get a good look at how its connected to the tank so I can replace with a plug. I had to rotate that clamp just to be able to install the plastic plug so it doesnt seem like anyone has ever had to install a plug or hose into it. Im confused.

It's probably an 'add on' by a previous owner and was put there to drain the water heater. I have a valve added on to mine instead of a plug. Same reason, a previous owner needed to drain the system, maybe frequently, and didn't want to fuss with a plug that was behind a gas line.

Do you have make and model?
Atwood water heaters are aluminum tanks. Tey use a 1/2 inch nylon plug on the exterior. This is used for draining.
Suburban water heaters are glass lined steel tanks. They use an anode in 3/4 (?) pipe whole. This is to prevent the tank from rusting out.
Some older rigs had American Water Heaters. Yours should have either Atwood or Suburban.