Screw, comprising head with two differently shaped segments for manipulation with open-end wrench or fingers

摘要

The screw has a cylindrical shaft with an outer thread and a specifically shaped head. The head is divided into two segments (2, 5) of different diameters. The first, upper segment is designed in a hexagonal shape (5) and can be manipulated with an open end spanner or a socket wrench. A segment with a wider diameter (2) is positioned directly below the hexagonal area (5) and provided with a ribbed outer surface in order to be held and rotated using the fingers.