Spreading dowel for window frame fastening - has larger cross=section in rear part for frame bore than frame bore and screw dia., with long slits longer than increased dia. section

摘要

The outer diameter of the plastics dowel corresponds approx. to that of the frame and masonry bores. The front part dowel dia. for the masonry is smaller than the core dia. of the cooperating screw. The front part of the dowel has longitudinal slits, longer than the length of dowel part with smaller length of smaller dia. The dowel cross section, defined by its periphery and its bore, in its rear part for the window frame is greater than the cross section, defined by the frame bore and the screw periphery. In this dowel section are provided long slits of greater length than that of the section with cross-sectional increase. The screw rear part has additional thread, extended over the frame, at least partly, when the dowel is anchored.