This Dzus Slide Latch comprises a sliding bar attached to a housing / mounting plate (which is riveted to the panel). The latch engages onto a bush which can be riveted or screwed to the support member.
The latch can be mounted on the top or the underside of a panel. To mount to the underside of a panel it must be mounted at the edge of the panel and the sliding bar must be turned so that the finger tab is facing up.