| 摘要 |
<p>The screw has a screw head (1) comprising a screw drive, and a screw shank (5) connected to the screw head and comprising a grooved thread (8). The screw shank exhibits rounded off polygonal or circular cross section, and is conically formed in contact area (9) defined for thread engagement with a hole. A groove zone (7) is arranged at front end (6) of the screw shank, and cylindrical area is formed between the contact area and a contact surface (3) of the screw head. The screw shank exhibits taper in the contact area, and the screw is manufactured by die casting process. The screw head is designed as a fillister head.</p> |
