Power connector hole size?

[DuncanM]

Sorry if it's a trivial question - I've searched and done my best but....

Can anyone tell me the hole diameter in millimetres for the SmallBear 2.1mm plastic power connector?

I'm awaiting delivery of one but I need to get on and finish drilling the box.
Impatient of me I know, but I have a deadline.

Many thanks.

[Paul Perry (Frostwave)]

13mm, in my opinion.