Screw for fixing hollow plastic section members with metal profiled reinforcements to a substructure

摘要

The screw for fastening metal profile reinforced plastic window frames to walls has a collar below its head (6). The width of the gap between the two corresponds to the thickness of the outer profile wall (10). The section of the screw between the collar and thread is cylindrical and fits through bores (20, 21) in inner profile walls (22, 23).