Screw-securing means with optical function display

摘要

The two-stage or single-stage screw-securing means with optical display is held together by a bonding foam 6 to form an assembly unit, comprising the perforated discs 1 and 2 with the balls 5 and the intermediate disc 4. Upon tightening the nut 13, by virtue of the balls 5 being lowered into the perforated discs 1 and 2, via the resulting displacement resistance, a precisely defined prestressing in the screw 14 is optically displayed by the lateral emergence of the bonding foam. IMAGE