You shouldn't need an adapter with single wall
Also don't get crazy concerned of there is an ever so small gap between the stove pipe and flue collar, if wont leak smoke and it doesn't need sealant between any of the seams, just 3 self taping screws, don't forget, male end pointed back to the stove incase liquid creosote forms, it can drip back into the stove, the smoke will naturally be pulled by the vacuum (draft) out through the chimney.
Thank you! I was concerned I wouldn't be able to get my first burn in this weekend.