It depends on the material you are fitting it into. In most wood I pre-drill a 1/4 hole for this. In softer woods i would drill a smaller hole .
The recommended drill bit size for a 5/16 inch screw is 1/8 inch.
The recommended drill size for a 6 screw is 7/64 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 7/64 inch drill bit should be used for a 6 screw.
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.
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 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.
A 3/16 drill bit.
I use a 3/8 bit for tapping fine thread, or a 11/32 for coarse threads.