I would use a 5/8 drill bit which is almost exactly 16mm.
For a 16mm drill, the appropriate size pilot hole typically ranges from 10mm to 12mm in diameter, depending on the material and the specific application. A pilot hole that is slightly smaller than the drill bit diameter helps to guide the drill and reduce friction. Always refer to the manufacturer's guidelines for specific recommendations based on the type of drill and material being used.
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For a cut tap the correct drill size is a #17 drill, which has a diameter of .173 inches.
The recommended drill size for a 12 screw is 5/32 inches.
A 6mm drill bit can drill a hole that is approximately 15/64 inches in size.
To drill out a hole that has a diameter of 0.055 inches, you would typically use a drill bit that is slightly larger than 0.055 inches, depending on the desired final size. If you need to increase the hole size, you can consider using a 1/16 inch (0.0625 inches) drill bit, which is a common size for this purpose. Always ensure to check the specifications for the application to avoid oversizing.
For a 6 screw, you should use a drill bit that is 7/64 inches in size.
A drill bit size of .376 inches is equivalent to a 3/8 inch drill bit, which is slightly smaller than 3/8 inch (0.375 inches) and larger than 13/32 inch (0.40625 inches). In metric terms, this is approximately 9.55 mm. It’s important to choose the right drill bit size based on the specific requirements of your project.
A 16mm diameter is roughly equivalent to about 0.63 inches, which is slightly larger than a U.S. nickel coin. To visualize it, think of the size of a small button or a large marble. It's a common size in various applications, such as in jewelry or mechanical components.
size 6 rings start at 10 then just add the size to it,lets say its a size 6 so,10+6=16mm
The recommended 5 drill bit size for drilling holes in metal is 0.2055 inches in diameter.
The recommended drill bit size for a 1/4 lag screw is 3/16 inches.