10 mm would be ideal. But 13/32" will work.
12mm
For a 10mm Rawl bolt, you typically need to use a drill bit that is slightly smaller than the bolt's diameter to ensure a snug fit. The recommended drill bit size is usually 8-9mm, depending on the type of Rawl bolt and the material you are drilling into. Always check the manufacturer's specifications for the specific bolt you are using, as requirements may vary.
That size is 8-32. The drill bit for a clearance hole is 11/64, or a #17 drill bit.
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The size of the drill bit you should use for your project depends on the size of the hole you need to drill. Check the project specifications or use a drill bit sizing guide to determine the appropriate size for the job.
The standard size of a 6mm drill bit is 6 millimeters in diameter.
The recommended drill bit size for a 15/64 inch hole is a 15/64 inch drill bit.
The recommended size of the drill bit for a 7/16 inch hole is a 7/16 inch drill bit.
A 10 cm hole is almost 4 inches ! ! - IF you meant 10mm, then that's a little over 3/8 of an inch, or 13/32 for a clearance hole.
For an M6 tap, a drill bit size of 5.0mm should be used.
The recommended drill bit size for a 10 screw is 3/16 inch.
The recommended drill bit size for a 6 screw is 7/64 inch.