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  2. Spacers and standoffs - Wikipedia

    en.wikipedia.org/wiki/Spacers_and_standoffs

    Two sizes of metal standoffs and one plastic standoff. The background depicts a standoff in use, holding a circuit board above a metal case. A standoff is a threaded separator of defined length used to raise one part in an assembly above another. They are usually round or hex (for wrench tightening), often made of stainless steel, aluminum ...

  3. Weld nut - Wikipedia

    en.wikipedia.org/wiki/Weld_nut

    Round base nuts. These nuts have a long threaded cylinder with a large circular base to make welding easy. They also sometimes have projections (known as weld nibs or bosses) to keep the nut from warping while welding with a high current. [1] Slab base nuts. These are very similar to the round base nuts, but with an obround, or slab shaped ...

  4. Door breaching - Wikipedia

    en.wikipedia.org/wiki/Door_breaching

    The safest option is a frangible round such as the TESAR or Hatton round, which turns to dust upon penetrating the door and disperses completely upon exit, though, these rounds are also more expensive. [4] [5] [23] Breaching a door with the fewest shots possible is faster and reduces the chance of collateral damage.

  5. Breaching round - Wikipedia

    en.wikipedia.org/wiki/Breaching_round

    A US Marine practices shotgun door-breaching techniques. A breaching round or slug-shot is a shotgun shell specially made for door breaching.It is typically fired at a range of 6 inches (15 cm) or less, aimed at the hinges or the area between the doorknob and lock and doorjamb, and is designed to destroy the object it hits and then disperse into a relatively harmless powder.

  6. Glazier - Wikipedia

    en.wikipedia.org/wiki/Glazier

    They may have to consider the type and size of scaffolding they need to stand on to fit and install the glass. Glaziers may work with glass in various surfaces and settings, such as cutting and installing windows, doors, shower doors, skylights, storefronts, display cases, mirrors, facades, interior walls, ceilings, and tabletops. [1] [2]

  7. Jeld-Wen - Wikipedia

    en.wikipedia.org/wiki/Jeld-Wen

    In 2016, door manufacturer Steves & Sons sued JELD-WEN on antitrust grounds for its 2012 acquisition of rival doorskin manufacturer Craftmaster International (CMI). In 2021 the Fourth Circuit affirmed the trial judge's remedy that JELD-WEN must sell CMI's Towanda factory, which was the first time that a private lawsuit led to an order to divest ...

  8. Revolving door - Wikipedia

    en.wikipedia.org/wiki/Revolving_door

    A revolving door in Turkey (counter-clockwise rotation) A revolving door typically consists of three or four doors that hang on a central shaft and rotate around a vertical axis within a cylindrical enclosure. To use a revolving door, a person enters the enclosure between two of the doors and then moves continuously to the desired exit while ...

  9. Door security - Wikipedia

    en.wikipedia.org/wiki/Door_security

    A metal doorframe with a strike plate built in: in other doors this would be a metal strikeplate in a wooden doorframe. The term door security or door security gate may refer to any of a range of measures used to strengthen doors against door breaching, ram-raiding and lock picking, and prevent crimes such as burglary and home invasions. Door ...

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