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2. Clevis fastener - Wikipedia

   en.wikipedia.org/wiki/Clevis_fastener

   A clevis bracket generally takes the form of a solid metal piece with a flat rectangular base, fitted with holes for bolts or machine screws, and two rounded wings in parallel forming a clevis. Commonly used in aircraft and cars, clevis brackets allow mounting of rods to flat surfaces.

3. Screw mechanism - Wikipedia

   en.wikipedia.org/wiki/Screw_mechanism

   Because of its self-locking property (see below) the screw is widely used in threaded fasteners to hold objects or materials together: the wood screw, sheet metal screw, stud, and bolt and nut. The self-locking property is also key to the screw's use in a wide range of other applications, such as the corkscrew , screw top container lid ...

4. Tribrach (instrument) - Wikipedia

   en.wikipedia.org/wiki/Tribrach_(instrument)

   If there is a considerable difference between the elevation of the target and the elevation of the marker and the instrument bottom plate, such as when the target is in a deep hole, or the tripod is on a Bilby tower, the target will appear to move laterally by a large distance in the optical plummet as the tribrach level is adjusted.

5. Positive locking device - Wikipedia

   en.wikipedia.org/wiki/Positive_locking_device

   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 split beam nut; A castellated nut and a split pin; A hex nut or cap screw and a tab washer

6. List of screw and bolt types - Wikipedia

   en.wikipedia.org/wiki/List_of_screw_and_bolt_types

   self-tapping machine screw: A self-tapping machine screw is similar to a machine screw, except the lower part of the shank is designed to cut threads as the screw is driven into an untapped hole. The advantage of this screw type over a self-drilling screw is that, if the screw is reinstalled, new threads are not cut as the screw is driven. set bolt

7. Bayonet mount - Wikipedia

   en.wikipedia.org/wiki/Bayonet_mount

   A bayonet mount A bayonet mount before and after insertion Early-19th century socket bayonet Socket of a bayonet. A bayonet mount (mainly as a method of mechanical attachment, such as fitting a lens to a camera using a matching lens mount) or bayonet connector (for electrical use) is a fastening mechanism consisting of a cylindrical male side with one or more radial pins, and a female receptor ...