Ejot Se & Co. Kg

David Korn

Ralph J Hellmig

The invention relates to a spring head screw assembly () incorporating a spring head screw () having a head () with a conical skirt () that widens towards the free end of a threaded shank which adjoins the head (), wherein the spring head screw assembly () has a washer () which is located between the skirt and the threaded part () of the shank () in an unthreaded part () of the shank that has a bolt diameter (d). The inner surface () of the skirt transitions into the shank at a radius (R), wherein the inner surface () forms a contact angle (α) with a support plane (E). The support plane is defined by the end of the skirt facing the free end of the screw and is orthogonal to the screw axis. The shank has, between the support plane and the radius in the transition to the skirt, a cylindrical region having the bolt diameter.

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Bad Laasphe, Germany

David Korn