| 摘要 |
The invention relates to a fastener (10) comprising a shaft (12), comprising a disk-shaped head (14) which is integrally joined to the shaft (12) and which is provided with cutting ribs (24) on a lower face (18), each said cutting rib extending overall from the inside to the outside, and comprising a rotational receiving area in order to apply the fastener (10) in a rotating manner. The cutting ribs (24) are curved in a concave manner in the rotating direction such that granular cut material that is generated during the applying process of the fastener (10) is conveyed between each pair of cutting ribs (24) that are adjacent in a circumferential direction in the direction towards a central axis (19). |
