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  2. Nail (fastener) - Wikipedia

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

    Shank: the body the length of the nail between the head and the point; may be smooth, or may have rings or spirals for greater holding power Sinker : these are the most common nails used in framing today; same thin diameter as a box nail; cement coated (see above); the bottom of the head is tapered like a wedge or funnel and the top of the head ...

  3. Back-up ring - Wikipedia

    en.wikipedia.org/wiki/Back-up_ring

    A back-up ring is a rigid ring that holds an elastomeric seal or plastic (such as Polyethylene) connection to its designed shape and in its correct place. Back up rings are commonly used with O-rings, lip seals, and as reciprocating shaft seals. They are also used for piping connections joining two different materials - typically one flexible ...

  4. Orangeburg pipe - Wikipedia

    en.wikipedia.org/wiki/Orangeburg_pipe

    Orangeburg pipe (also known as "fiber conduit", "bituminous fiber pipe" or "Bermico" or "sand pipe") is bituminized fiber pipe used in the United States. It is made from layers of ground wood pulp fibers and asbestos fibres compressed with and bound by a water resistant adhesive then impregnated with liquefied coal tar pitch .

  5. Compression fitting - Wikipedia

    en.wikipedia.org/wiki/Compression_fitting

    A compression fitting 15 mm isolating valve. A compression fitting is a fitting used in plumbing and electrical conduit systems to join two tubes or thin-walled pipes together. . In instances where two pipes made of dissimilar materials are to be joined (most commonly PVC and copper), the fittings will be made of one or more compatible materials appropriate for the connect

  6. Expansion joint - Wikipedia

    en.wikipedia.org/wiki/Expansion_joint

    Pipe expansion joints are necessary in systems that convey high temperature substances such as steam or exhaust gases, or to absorb movement and vibration. A typical joint is a bellows of metal (most commonly stainless steel), plastic (such as PTFE), fabric (such as glass fibre) or an elastomer such as rubber. A bellows is made up of a series ...

  7. Retaining ring - Wikipedia

    en.wikipedia.org/wiki/Retaining_ring

    A retaining ring is a fastener that holds components or assemblies onto a shaft or in a housing/bore when installed - typically in a groove - for one time use only. Once installed, the exposed portion acts as a shoulder which retains the specific component or assembly.