|6296136||Obturator with improved retention in a metal sheet aperture|
An obturator for an aperture (8) produced in a metal sheet (9) has a central dome (1), a peripheral lip (3) and an annular part (3) extending between the dome (1) and the lip (2). The annular part (3) has a shoulder (4). The dome (1) is adapted to deform ...
|3983598||Self-boring bushing device|
A self-boring bushing device adapted to provide passage through a structure, such as a wall, wherein the device is so constructed as to both thread and bore itself therein upon rotation thereof, thus providing communication between both sides of the wall,...