Usually a 1/8 Allen key
The listed size of a #4 screw is 0.1120 inch. In fractions that's approximately 7/64
Please - , first define your size ! -You have given a decimal figure, but of what, - -an inch, a foot, an orange,a candy bar ? ?If it is 0.393700 of an inch, then I would use a 3/8 or 10mm wrench.
Metric size #6 shank, 32 is thread pitch per inch. The bigger the no. the bigger the screw size.
The next size larger from a number 6 size screw.
Depends on size of wrench.
The recommended drill bit size for a 5/16 inch screw is 1/8 inch.
The standard size of a tripod screw is 1/4 inch.
A 1 1/4" wrench will fit a bolt of the same size .
It is in between a 9/16 inch and a 5/8 inch.
For 1/2 inch plywood, a 6 or 8 screw size is typically recommended.
The recommended drill size for a 6 screw is 7/64 inch.
The size of a camera mount screw is typically 1/4 inch in diameter.
The standard size of a tripod mount screw is 1/4 inch.
The recommended pocket screw size for 3/4 inch plywood is 1-1/4 inch.
A 8 screw is typically 1/4 inch in diameter.
To determine the size of the rounded Allen wrench needed for the task, measure the diameter of the screw head or the hole it fits into. Match this measurement to the corresponding Allen wrench size.
A Westinghouse 32 inch TV should be mounted to the wall with a half inch screw. A larger screw can be used, if available.