Q & A: Do I have to use Kreg Screws?

Can I use any type of screw for Kreg Pocket-hole Joinery?

I wouldn’t use any other screw than a Kreg. The cost difference is relatively small, and their screws are far superior.

Self-tapping tip reduces chances for splitting.
Deep square drive never strips out.
Very hard steel; I’ve never had one break off in the hole (the frustration from having this happen even once with another screw will have you thinking as I do almost immediately).
They have a screw for everything.
Threads only go up 1/2 the screw, this prevents the screw from pushing the two workpieces apart.
(Maybe the most important) Kreg screws have a flat bottom head which creates a solid joint and prevents splitting. This is a major difference Kreg has over many others.
They are designed to be the best option for pocket joints. You may be able to go to a hardware store and buy similar screws at a better price, but be sure they have self-tapping threads.

Kreg Screws are available in two main thread types:

Coarse thread – work best in soft woods
Fine thread – works best in hard woods