Metal machine bolt has at least one recess in cylindrical surface region with its longitudinal axis at angle other than zero to vertical to bolt's longitudinal axis

摘要

The metal bolt (2) has a longitudinal axis (4), a head part (6) and a shaft part (8) with cylindrical surface region (10). in which there is at least one recess (16), the longitudinal axis of which is at an angle other than zero to a vertical to the bolt's longitudinal axis. The recess extends from the endface at least as far as the threaded region.