Different threads

 *Fully threaded wood thread

*Wood thread with partial thread

 *Wood wire with unbreakable tip ( or type 17 ), knurling to prevent slipping screwes to facilitate and to reduce the risk of breakage

*Metal thread with full thread

*Metal thread with partial thread

*Metal thread self-tapping three-lobe thread

*Cut metal thread, self-tapping thread

*Self-tapping metal thread with serrated point

*Sheet net

*Sheet metal thread with self-drilling point