A number 4 size screw comes from the fact that it is the fourth in a series of screw sizes. The screw sizes start at number 0 with a diameter of 0.060" and increase by 0.013" for each size larger.
The listed size of a #4 screw is 0.1120 inch. In fractions that's approximately 7/64
The next size larger from a number 6 size screw.
A number 8 screw typically requires a size 8 screw.
To determine the appropriate size for a screw, you can use screw numbers which are based on the diameter and length of the screw. The higher the screw number, the larger the diameter and length of the screw. You can match the screw number to the size needed for your project by referring to a screw size chart.
The standard size for a number 6 screw diameter is 0.138 inches.
The standard size for a number 8 screw diameter is 0.164 inches.
The standard size of a tripod screw is 1/4 inch.
A number 10 screw has a diameter of approximately 0.190 inches.
A number 8 screw has a diameter of approximately 0.164 inches.
Oh, dude, like, the numbers on a screw are just telling you how big it is. It's not a secret code or anything, just a way to know if it's gonna fit the hole you're trying to fill. So, if you see a screw that says, like, 4-40, it means it's a size 4 screw with 40 threads per inch. It's not rocket science, just screw science.
An M4 screw typically has a diameter of 4 millimeters.
The recommended pocket screw size for 3/4 inch plywood is 1-1/4 inch.