At least one embodiment generally relates to an installation assembly for an o?ening(135) in a workpiece (108) that includes a swaged collar(130), an inner member(145), and an outer member(140). The swaged collar(130) has a first end(200), a second end(210) ) and a main body(180) extending between the first end and the second end. The main body (180) includes an inner surface defining a passageway (190) through the collar. The inner member (145) has a mandrel section (330) for expanding the outer member (140). The inner member is used to expand the outer member and to keep the outer member in an expanded state.
