Abstract: A threaded screw with cutting notch structures thereon comprising a screw body and a plurality of screw threads provided along the screw body, characterized in that at least two notches, corresponding to each other are provided at the front end of the screw body, the interior space of the notch is tapered upward from the bottom forming into a slanting cut face and a cut wall, and the slanting cut face is corresponding to the cut wall and forming an inclination angle of 91 to 119 degree, thereby when the end portion of the first screw thread is screwed into a locking element, the screw threads are easily screwed in the locking element with the cut wall cuts the locking element and the debris of the locking element can be expelled by the space of the cutting notch and a lower resistance allowing a faster screwing process into the locking element.

Abstract: A pilot screw has a head, a shank beneath the head, a tapered tip at the end of the shank, and a spiral thread surrounding the shank. A large number of spaced auxiliary threads are disposed on the tapered portion of the head. A large number of spaced secondary threads are disposed on the shank between the pitches, and plural cutting gaps are formed at the end area of the spiral thread.