Abstract: A combination of a plastic part and metal part functions as a fastener to attach a panel to the flange of a portion of a chassis for electronic equipment or the like. The panel is formed with a counterbored hole and has an arcuate groove outside the counterbore on the outside of the panel and angularly spaced dimples on the underside. The fastener is a peripherally flanged hollow cylindrical member fitting into the hole and counterbore. It has a partially closed bottom and opposed openings in the cylindrical walls. A detent slants upward-outward from the bottom through one of the openings. A metal clip attaches to the cap, having an inverted U-shape having a web and two depending sides which fit through the openings. The top has a shoulder which locks outside the detent to hold the parts assembled and has a locking extension beyond the shoulder.

Abstract: A module is sandwiched between an underlying member and a superimposed enclosure. The underlying member may be a base or another enclosure. The module is constructed so that it can be secured to the underlying member. The superimposed member has feet formed with horizontal grooves which fit into pockets in corners of the module. A slide is horizontally movable in the module between retracted position and an operative position. In the operative position edges of the slide engage in the grooves in the feet to lock the superimposed enclosure to the module and thereby to the underlying member. The slide may be detachably secured in operative position.