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  2. Toggle bolt - Wikipedia

    en.wikipedia.org/wiki/Toggle_bolt

    A toggle bolt, also known as a butterfly anchor, is a fastener for hanging objects on hollow walls such as drywall. Toggle bolts have wings that open inside a hollow wall, bracing against it to hold the fastener securely. [1] The wings, once fully opened, greatly expand the surface area making contact with the back of the hollow wall.

  3. Molly (fastener) - Wikipedia

    en.wikipedia.org/wiki/Molly_(fastener)

    Figure 1 of the original patent for the molly bolt, U.S. Patent No. 2,018,251. The molly bolt was patented in 1934 by George Frederick Croessant. [3] Although his patent acknowledges that expandable fasteners of this general kind were already known, Croessant's patent is intended to provide "an improved and adequate anchoring grip that may be retightened if necessary and that will permit ...

  4. Wall plug - Wikipedia

    en.wikipedia.org/wiki/Wall_plug

    Other varieties of wall plug are mechanical anchors for heavy duty loads and hollow wall fixings for fixing to plasterboard. The first mechanical anchor, the Rawlbolt, was designed in the 1930s by the Rawlplug company and the first fixing for hollow walls was the Toggle Bolt, which was also designed by Rawlplug in 1941.

  5. List of screw and bolt types - Wikipedia

    en.wikipedia.org/wiki/List_of_screw_and_bolt_types

    Drywall screws designated as fine are the most common screws to use the twinfast style of threads. [5] wood screw: A metal screw with a sharp point designed to attach two pieces of wood together. Wood screws are commonly available with flat, pan, or oval-heads. A wood screw generally has a partially unthreaded shank below the head.

  6. 30 Man-Made Innovations That Were Designed Mimicking Nature’s ...

    www.aol.com/30-objects-were-directly-inspired...

    Image credits: Sasha Weilbaker #7 Solar Panels. While both solar panels and plant leaves harvest energy from the sun, a team at Princeton University took biomimicry in solar panels a step further ...

  7. Wingnut (hardware) - Wikipedia

    en.wikipedia.org/wiki/Wingnut_(hardware)

    A wingnut, wing nut or butterfly nut is a type of nut with two large metal "wings", one on each side, so it can be easily tightened and loosened by hand without tools. A similar fastener with a male thread is known as a wing screw [1] [2] or a wing bolt. [3]

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