Cutting 2” hole in panel. What size?

[Breath Sounds]

Hello,
I need to add a hole to side of my main panel to accept a 2” LB conduit body.
I have a Greenlee knockout kit but it doesn’t go up to 2”.
A 2”carbide whole saw is too small and a 2.5” seems like it’s going to be too big.
I see that Home Depot sells a 2-1/4” as well as a 2-5/8” hole saw.
Which one is it I want to go with? I’m trying to about too much play in the hole but not so tight the threads for the nipple won’t pass.

Appreciate any help/info.

JP

 

[Little Bill]

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