It depends which thread the screw is, the pitch and depth of the thread varies.
B.S.F. - 5.3 mm
Whitworth - 5.10 mm
B.S.P. - 11.80 mm
U.N.F. - 5.50 mm
U.N.C. - 5.2 mm
A.N.C., A.N.F. and B.A. threads are numbered, I.S.O threads are in metric
If they are self tapping screws, the drill bit is as thick as the solid barrel of the screw. If you want the screw to go through easily to have a nut on the other side, then the drill bit is slightly larger than thread 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.
I use a 3/16 drill bit for that.
Drill bits and screws are not the same and cannot be converted. vido produces drill bits with high quality, exported overseas and loved by the public. If you want to buy a drill, you can go to VIDO's official website to check.
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The recommended drill bit size for a 5/16 inch screw is 1/8 inch.
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.
A 3/16 drill bit.
A 7/64 inch drill bit should be used for a 6 screw.
The recommended drill bit size for a 6 screw is 7/64 inch for optimal performance and accuracy.
The recommended drill bit size for installing cabinet hardware with a 8 screw is 11/64 inch.
For installing a 1/4 inch screw into hardwood, it is recommended to use a 3/16 inch pre-drill bit.
A 3/16 inch pilot hole drill bit should be used for installing a 1/4 inch screw into hardwood.
For a clearance hole you need a 9/64 drill bit.
quarter inch drill bit
For a 1 1/4 screw, you should use a drill bit that is slightly smaller in diameter than the screw itself. In this case, a 1/8 inch drill bit would be suitable for drilling a pilot hole before driving in the screw.