Stove Pipe Trim Collar Won't Fasten to Chimney Support Box

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DadHamdard

New Member
Oct 8, 2022
1
Virginia
Hi all,

I installed a square flat ceiling support box for a stove. I inserted a 6" telescoping pipe into the support box. There is a trim collar that needs be fastened to the support box. There are very narrow four holes already made in the support box to which the trim collar should be fastened. Normal screws won't go through it. What kind of screws or other methods would it need to get fastened?

Attached is a photo. I inserted a little pressure which resulted in a little damage to the whole but its deep enough that I can still use it if I know how to use it. Thank you.

Thank you,
Dad Hamdard

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