摘要:
A screw (3) is used to join two profiled elements (1, 2). The screw has a drilling part (4), a thread part (5), an unthreaded shank section (15) and a screw head (7). The sum (S) of the length (B) of the drilling part (4) and the length (G) of the thread part (5) is equal to or less than the clearance (W) between two webs (10, 11), following one after the other in the drilling/screw-in direction, of the profiled elements (1, 2) to be joined together. Thus, the process of drilling into web (11) does not begin until the thread part (5) has already exited web (10).
摘要:
The screw to fix the distance of covering plates in a substructure is provided with two shank sections (9, 10) having threaded areas (11, 12) with different diameters. A stop-like section is formed below the screw head (14) and in a transition (15) between the two shank sections (9, 10). The unthreaded areas (16, 17) match the thickness of the covering plates to be fixed and the plain and sealing washers (18) used as well as the thickness of the substructure. A drilling part (19) is configured in the free end of the screw (1).
摘要:
A screw (3) is used to join two profiled elements (1, 2). The screw has a drilling part (4), a thread part (5), an unthreaded shank section (15) and a screw head (7). The sum (S) of the length (B) of the drilling part (4) and the length (G) of the thread part (5) is equal to or less than the clearance (W) between two webs (10, 11), following one after the other in the drilling/screw-in direction, of the profiled elements (1, 2) to be joined together. Thus, the process of drilling into web (11) does not begin until the thread part (5) has already exited web (10).
摘要:
The screw to fix the distance of covering plates in a substructure is provided with two shank sections (9, 10) having threaded areas (11, 12) with different diameters. A stop-like section is formed below the screw head (14) and in a transition (15) between the two shank sections (9, 10). The unthreaded areas (16, 17) match the thickness of the covering plates to be fixed and the plain and sealing washers (18) used as well as the thickness of the substructure. A drilling part (19) is configured in the free end of the screw (1).