Abstract: An anchor for a bolt formed of a single strip of sheet metal includes a pair of opposed shell portions having helically aligned connecting strips. The shell portions extend from a bottom end of the anchor having a threaded sleeve for accepting the bolt. The free ends of the shell portions have tabs extending outwardly for engagement into the plate in which the member is being installed. The anchor is formed by first stamping a strip of metal and then bending the ends of the strip to form a cylindrical shell. Axially aligned tabs on the free ends extend into complimentary recesses to join the two shell halves together.

Abstract: A retaining device for fastening an appliance insert in a base panel, such as a sink in a kitchen work surface. The device has a retaining clamp that can be fixed in an opening in the work surface, and a retaining web connected to the sink that can be introduced into the retaining clamp from above and anchored in place. The retaining clamp includes an elongated retaining leg and two elastically resilient clamping legs integrally formed, in a U-shaped manner, on the ends of the retaining leg. The retaining leg can be firmly fixed in a predetermined position on the side edges of the opening while the clamping legs have latching teeth oriented towards the retaining leg and into which the retaining web can be latched, by a latching web directed towards the latching teeth, after being pressed into the retaining clamp.

Abstract: A metal dowel for anchorage in a wall panel, said dowel being made from a folded blank of sheet metal and comprising a pair of flat leg members folded over at one end to lie flat against each other, the legs tapering toward the folded end to form a pointed end to the dowel and being held together at said folded end by a breakable web formed by the fold between said legs. The leg members are fixedly connected together at the opposite end to form a head end to the dowel and a threaded hole is formed out of and located between the legs adjacent the head end of the dowel with a funnel-shaped recess formed out of and located between said legs being axially aligned with said threaded hole and located between the threaded hole and the pointed end. After insertion of the dowel pointed end first into a panel, threading of a threaded member into the threaded hole with the tip thereof entering into said recess, breaks the web and forces the legs apart to anchor the dowel in the panel.

Abstract: A self-locking sheet-metal nut having a generally flat leg with an embossed thread portion for receipt of a screw and a pair of locking tabs resiliently and integrally connected to one end of said leg that extend over and are spaced from the leg. The tabs are approximately perpendicular to the axis of the screw and have clamping edges which are directed toward each other and form an opening downstream of the embossed thread portion that is smaller than the core diameter of the screw to be threaded into the nut. Upon turning of a screw through the nut, the clamping edges are forced apart and resiliently grip the core of the screw to lock it in place.

Abstract: A fastening device for holding elements such as snap pins or clamps on a cover plate made of molded fiber which includes a holding plate spaced above the cover plate and having support plates fixed to opposite ends thereof by side walls. A separate intermediate plate is between the holding plate and support plates and the cover plate and has a plurality of claws adapted to penetrate the fiber plate. The intermediate plate and the holding plate are fastened together by hooks and/or snap fasteners.