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  2. Oxide jacking - Wikipedia

    en.wikipedia.org/wiki/Oxide_jacking

    Oxide jacking has caused concrete spalling on walls of the Herbst Pavilion at Fort Mason Center in San Francisco. The expansive force of rusting, which may be called oxide jacking or rust burst, is a phenomenon that can cause damage to structures made of stone, masonry, concrete or ceramics, and reinforced with metal components.

  3. Positive locking device - Wikipedia

    en.wikipedia.org/wiki/Positive_locking_device

    A wheel hub with a castellated nut secured in the center using a cotter pin to prevent it from unscrewing. A positive locking device is a device used in conjunction with a fastener in order to positively lock the fastener. This means that the fastener cannot work loose from vibrations. The following is a list of positive locking devices: [1] A ...

  4. List of screw and bolt types - Wikipedia

    en.wikipedia.org/wiki/List_of_screw_and_bolt_types

    A special type of bolt that is set into concrete, with screw threads protruding above the concrete surface to accept a nut. breakaway bolt: A breakaway bolt is a bolt with a hollow threaded shank, which is designed to break away upon impact. Typically used to fasten fire hydrants, so they will break away when hit by a car. Also used in aircraft ...

  5. Bolt (fastener) - Wikipedia

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

    Bolt with a nut. A bolt is an externally helical threaded fastener capable of being tightened or released by a twisting force to a matching nut. The bolt has an external male thread requiring a matching nut with a pre-formed female thread. [1]

  6. Split nut - Wikipedia

    en.wikipedia.org/wiki/Split_nut

    A split nut is a nut that is split lengthwise into two pieces (opposed halves) so that its female thread may be opened and closed over the male thread of a bolt or leadscrew. [1] This allows the nut, when open, to move along the screw without the screw turning (or, vice versa, to allow the screw to pass through the nut without turning).

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  8. PHOTO COLLECTION: AP Top Photos Australian Open Tennis

    www.aol.com/photo-collection-ap-top-photos...

    This is a collection of photos chosen by AP photo editors. Zhang Zhizhen of China serves to Holger Rune of Denmark during their first round match at the Australian Open tennis championship in ...

  9. Distorted thread locknut - Wikipedia

    en.wikipedia.org/wiki/Distorted_thread_locknut

    These are known as one-way nuts as the nut may be easily started on the male fastener from the bottom non-deformed portion but is practically impossible to start from the deformed end. As the male fastener reaches the deformed section it stretches the threads of the nut elastically back into a circle. This action increases the friction between ...

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