Hilti Aktiengesellschaft

Thorsten Ebert

Jan Allaart

Sven Dietze

A fastening element which has a core () of a relatively hard, carburized steel and a ferritic rim zone () of a less hard, low-carbon steel, includes a stem (), a head () provided at one end of the stem (), a tip () provided at an opposite end of the stem (), and a transition region () extending between the stem () and the tip () and in which a thickness () of the ferritic rim zone () gradually diminishes from the stem () in a direction toward the tip () to a nill value (), so that the tip () is free from the ferritic rim zone ().

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Hergensweiler, Germany

Thorsten Ebert