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2. List of screw and bolt types - Wikipedia

   en.wikipedia.org/wiki/List_of_screw_and_bolt_types

   A rib neck carriage bolt has several longitudinal ribs instead of the square section, to grip into a metal part being fixed. confirmat screw: confirmat screw: Used in particleboard and medium-density fiberboard: elevator bolt: An elevator bolt is a similar to a carriage bolt, except the head (or foot, depending on the application) is thin and flat.

3. Emery Worldwide Airlines Flight 17 - Wikipedia

   en.wikipedia.org/wiki/Emery_Worldwide_Airlines...

   The disconnection was caused by the failure to properly secure and inspect the attachment bolt. [5] The NTSB then added: "The safety issues discussed in this report include DC-8 elevator position indicator installation and usage, adequacy of DC-8 maintenance work cards (required inspection items), and DC-8 elevator control tab design.

4. Bolt (fastener) - Wikipedia

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

   Elevator bolt - Bolt with a large flat head used in conveyor system setups. Hanger bolt - Bolt that has no head, machine threaded body followed by a wood threaded screw tip. Allow nuts to be attached to what is really a screw. Hex bolt - Bolt with a hexagonal head and threaded shank. Section immediately under head may be unthreaded for ...

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6. Screw - Wikipedia

   en.wikipedia.org/wiki/Screw

   A lathe of 1871, equipped with leadscrew and change gears for single-point screw-cutting A Brown & Sharpe single-spindle screw machine. Fasteners had become widespread involving concepts such as dowels and pins, wedging, mortises and tenons, dovetails, nailing (with or without clenching the nail ends), forge welding, and many kinds of binding with cord made of leather or fiber, using many ...

7. TWA Flight 529 - Wikipedia

   en.wikipedia.org/wiki/TWA_Flight_529

   Schematic of elevator boost linkage mechanism, showing location of missing bolt (A) The CAB investigated the accident, and as the wreckage pieces were reassembled and scrutinized, it became apparent that a critical 5/16 inch AN-175-21 nickel steel bolt was missing in the elevator boost linkage mechanism. [5]