An injection molded screw retainer is employed on an air intake manifold system to retain screws which connect an active system body to a manifold lower assembly. The retainer is substantially "L-shaped" and includes a retaining portion and a substantially perpendicular attachment portion. The retaining portion includes a substantially hemispherical feature positioned substantially over the head of the screw. The oversized attachment portion is inserted within a pocket in the active system body. Ultrasonic energy applied by a sonic welding process slightly melts the outer surface of the attachment portion, creating a weld interference between the attachment portion and the pocket, securing the attachment portion within the pocket.

The present invention refers to a support frame (2) for wall-mounting at least one electrical apparatus, the frame (2) comprising:--a frame body (7) fixable to the wall and developing about a window (9) defining a mounting seat adapted for receiving and holding said at least one electrical apparatus; and--fixing means (12) for removably fixing a cover plate (3) to the support frame (2). The support frame (2) is characterised in that the fixing means includes at least one fixing channel (12) exhibiting an end jointed to an opening (13) obtained in the frame body (7), the fixing channel (12) being such as to be capable of receiving, through the opening (13), a corresponding fixing tongue (4), provided in the cover plate (3), the fixing channel (12) including therein relief means (14) that can face a surface (31) of the tongue (4) and pushing means (20, 21) adapted for acting on the fixing tongue (4) for engaging pressure-wise said surface (31) of the tongue against said relief means (14) of the channel (12).

Formed metal electrical wiring boxes possess integral wiring device mounting members which permit the facile push-insertion of the wiring device mounting screws, but which firmly engage the mounting screws once tightened down. The mounting members comprise a flat portion attached to each endwall of the wiring box and formed at right angles to the endwalls. Opposed leg portions are attached to the flat portion, and are folded downwardly along the box endwalls. The leg portions terminate in opposed foot portions spaced apart from one another by a distance less than the diameter of the wiring device mounting screw. A mounting screw inserted through an aperture in the flat portion and between the opposed leg portions contacts the opposed foot portions forcing the leg portions apart to permit the push-insertion of the screw. Turning the mounting screw draws the opposed foot portions upward, forcing them against the screw threads to firmly engage the screw.

A mounting formation for an electrical outlet box includes a dome and a flap. The dome has a base that is formed within an opening. The base is connected to the wall of the electrical outlet box and the flap is connected to the dome within the opening to cover a first portion of the opening while defining a second portion that is uncovered and crescent shaped. The mounting formation facilitates the installation of electrical outlet box, boxes without the need to separately remove a knock-out prior to the installation of fasteners.

A non-metallic electrical wiring box having a fast set screw mounting socket for mounting electrical devices inside the box. The box includes a pair of side walls, a pair of end walls, a back wall, a front opening and one or more fast set screw mounting sockets in each end wall, or connected to each end wall, for receiving a mounting screw. Each socket includes: a socket wall, preferably a cylindrically-shaped wall, an interior wall surface, a first end, a second end and a mid-region. The first end corresponds to the front opening of the box and the mid-region is between the first and second ends of the fast set screw mounting socket. Each socket also has a center slot in the socket wall, which preferably bisects the socket wall and extends from about the mid-region to the second end of the socket and defines two or more flexible socket wall sections.