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  2. Screw extractor - Wikipedia

    en.wikipedia.org/wiki/Screw_extractor

    The screw is drilled out with the appropriate drill and drill bushing. The extractor is then hammered into the hole with a brass hammer, because a steel hammer is more likely to cause the extractor to break. The appropriate special nut is then attached to the end of the extractor. The nuts can then be turned with a wrench to remove the screw. [1]

  3. Jam nut - Wikipedia

    en.wikipedia.org/wiki/Jam_nut

    The inner nut is tightened to about a quarter to a half of the torque of the outer nut. It is then held in place by a wrench while the outer nut is tightened on top using the full torque. This arrangement causes the two nuts to push against each other, creating a tensile stress in the short section of the bolt that lies between them. Even when ...

  4. Nut driver - Wikipedia

    en.wikipedia.org/wiki/Nut_driver

    A nutdriver or nut driver is a hand tool for tightening or loosening nuts and bolts. It essentially consists of a socket attached to a shaft and cylindrical handle and is similar in appearance and use to a screwdriver. [1] They generally have a hollow shaft to accommodate a shank onto which a nut is threaded.

  5. Locknut - Wikipedia

    en.wikipedia.org/wiki/Locknut

    A locknut, also known as a lock nut, locking nut, self-locking nut, prevailing torque nut, [1] stiff nut [1] or elastic stop nut, [2] is a nut that resists loosening under vibrations and torque. Prevailing torque nuts have some portion of the nut that deforms elastically to provide a locking action. [ 2 ]

  6. Cheater bar - Wikipedia

    en.wikipedia.org/wiki/Cheater_bar

    Nearly every auto body or mechanic shop will have an air compressor and impact wrench to loosen and tighten lug nuts on wheels. [6] Most major tool manufacturers carry an air impact wrench, including DeWalt, Ingersoll, and Paoli SRL. Torque multiplier – Uses a multi-stage epicyclic gearing mechanism to multiply torque output. Torque is ...

  7. Tap and die - Wikipedia

    en.wikipedia.org/wiki/Tap_and_die

    While modern nuts and bolts are routinely made of metal, this was not the case in earlier ages, when woodworking tools were employed to fashion very large wooden bolts and nuts for use in winches, windmills, watermills, and flour mills of the Middle Ages; the ease of cutting and replacing wooden parts was balanced by the need to resist large amounts of torque, and bear up against ever heavier ...

  8. Socket wrench - Wikipedia

    en.wikipedia.org/wiki/Socket_wrench

    A socket wrench (or socket spanner) is a type of spanner (or wrench [1] in North American English) that uses a closed socket format, rather than a typical open wrench/spanner to turn a fastener, typically in the form of a nut or bolt. [2] The most prevalent form is the ratcheting socket wrench, often informally called a ratchet.

  9. Set screw - Wikipedia

    en.wikipedia.org/wiki/Set_screw

    Isometric projection of a grub screw with a hex socket head.. Set screws are not always the best way to resist the torque of driven shafts. To reduce the chance of slipping and to increase load capacity, a detent (often called a "flat") may be milled or ground at the part of the shaft where the set screw's point contacts.