Patent ID: 7520710

Claim:
A linearly driven-in fastening element, comprising a stem ( 11 having a tip ( 13 ) at one end thereof; a head ( 14 ) arranged at an end of the stem ( 11 ) opposite the tip ( 13 ), the stem ( 11 ) having a first bullet-shaped section ( 21 ) extending from the tip ( 13 ) in a direction of the head ( 14 ), and a second section ( 22 ) adjoining the first section ( 21 ) at an end of the first section ( 24 ) remote from the tip ( 13 ) and extending in the direction of the head ( 14 ); and a thread profile ( 15 ) provided on the stem ( 11 ), the thread profile ( 15 ) having, on the second section ( 22 ), a constant steep gradient with a lead angle (β 2 ) from 50° to 74° and, on the first section ( 21 ), a gradient that increases from the lead angle (β 2 ) of the second section ( 22 ) toward the tip ( 13 ), with a lead angle (β 1 ) at a half of a length between the tip ( 13 ) and the end ( 24 ) of the first section ( 21 ) remote from the tip ( 13 ) amounting to at least 75° .