Will this fit the solo stove bonfire fire pit - large 19.5?

We have this spark screen and the bonfire and they fit together as advertised.

Will this fit the Yukon?

I do not believe so. The "bonfire" pit is the medium size solo stove. "Yukon" is the larger model. I believe this spark screen is sized for the "bonfire". That's not to say, however that they do not have one that fits the Yukon. You would just have to search specifically for "Yukon" spark screen.

Will this fit the hi-flame bonfire stove fire pit 20.5 inches all stainless steel heavy duty outdoor smokeless firepit? i believe it is 22.5 inches?

Each stove has its own accessories. I'm answering a few of these so not sure I'm getting ur ? Right. I have the yukon but I got mine thru the SOLO company even though I bought the stove from Amazon.

What is the warranty on the screen for the bonfire

From my recollection there's no specific time other then to say how rugged it is. Ive got one and believe me its rugged and you will get many years of great use out of it! I have the whole set-up of accessories and they are all of the same quality that my solo stove is!