Need help guys

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Here is a link to a table that I use all the time. . I keep the link on my desktop.

Drill Size Conversion Table

Looks to me like a 25/64" would do the trick, but the hole will be very slightly undersize.
 
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A 25/64 is the same as a 10mm. I use this link a lot: Millimeters to Inches (mm to in) conversion calculator

It's actually not the same. That converter is telling you the closest fractional size only and does not include letter bit sizes. In this particular case it works because that is the closest but in other cases it may not be the best choice. The table linked above gives better information for choices.
 
But a 10mm tube will fit in a blank drilled with a 25/64 bit. I have a 25/64, and the package says 10.0 mm (25/64) Ordered it from PSI
 
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