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  2. Castellated nut - Wikipedia

    en.wikipedia.org/wiki/Castellated_nut

    The nut is torqued properly and then, if the slot is not aligned with the hole in the fastener, the nut is rotated forward to the nearest slot. The nut is then secured with a split pin/cotter pin, R-clip or safety wire. It is a positive locking device. [1] Castellated nuts are used in low-torque applications, such as holding a wheel bearing in ...

  3. Split pin - Wikipedia

    en.wikipedia.org/wiki/Split_pin

    Split pin. A split pin, also known as a cotter pin, or cotter key in the US, [1] is a metal fastener with two tines that are bent during installation, similar to a staple or rivet. Typically made of thick wire with a half-circular cross section, split pins come in multiple sizes and types. The British definition of " cotter pin " may include ...

  4. Bolted joint - Wikipedia

    en.wikipedia.org/wiki/Bolted_joint

    A bolted joint is one of the most common elements in construction and machine design. It consists of a male threaded fastener (e. g., a bolt) that captures and joins other parts, secured with a matching female screw thread. There are two main types of bolted joint designs: tension joints and shear joints.

  5. R-clip - Wikipedia

    en.wikipedia.org/wiki/R-clip

    R-clip. An R-clip, also known as an R-pin, R-key, hairpin cotter pin, [1] hairpin cotter, [2] bridge pin, [2] hitch pin clip[3][4] or spring cotter pin, [5] is a fastener made of a durable but flexible material, commonly hardened metal wire, resembling the shape of the letter "R". R-clips are commonly used to secure the ends of round shafts ...

  6. 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 ...

  7. Cotter (pin) - Wikipedia

    en.wikipedia.org/wiki/Cotter_(pin)

    Cotter (pin) A cotter is a pin or wedge with a flat bearing surface passing through a hole to fix parts tightly together. In British usage cotter pin has the same meaning, [1] but in the U.S. it means a split pin. Typical applications are in fixing a crank to its crankshaft, as in a bicycle, and a piston rod to a crosshead, as in a steam engine ...