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  2. Seng Heng Engineering - Wikipedia

    en.wikipedia.org/wiki/Seng_Heng_Engineering

    Seng Heng Engineering is a small and medium enterprise in Singapore, providing fasteners, turnkey machining and corrosion resistant coating products globally. History. In 1945 , Seng Heng Engineering started as Seng Heng Iron Works producing nuts and bolts in Chinatown, Singapore. It was founded by Lau Kum Kuan.

  3. Bolt (fastener) - Wikipedia

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

    Bolt (fastener) A bolt is an externally helical threaded fastener that fastens objects with unthreaded holes together. This is done by applying a twisting force ( torque) to a matching nut. The bolt has an external male thread requiring a matching nut with a pre-formed female thread. [ 1] Unlike a screw, which holds objects together by the ...

  4. Unified Thread Standard - Wikipedia

    en.wikipedia.org/wiki/Unified_Thread_Standard

    Unified Thread Standard. The Unified Thread Standard ( UTS) defines a standard thread form and series—along with allowances, tolerances, and designations—for screw threads commonly used in the United States and Canada. It is the main standard for bolts, nuts, and a wide variety of other threaded fasteners used in these countries.

  5. Sex bolt - Wikipedia

    en.wikipedia.org/wiki/Sex_bolt

    A sex bolt is a type of fastener comprising a mated pair of screw and post, which are a machine screw and a nut that is barrel-shaped. The nut has a flange and a protruding boss that is internally threaded. The bolt (mated pair, screw and post) sits within the components being fastened, and the flange provides the bearing surface.

  6. Fastener - Wikipedia

    en.wikipedia.org/wiki/Fastener

    A fastener (US English) or fastening (UK English) [ 1] is a hardware device that mechanically joins or affixes two or more objects together. In general, fasteners are used to create non-permanent joints; that is, joints that can be removed or dismantled without damaging the joining components. [ 2] Steel fasteners are usually made of stainless ...

  7. List of screw and bolt types - Wikipedia

    en.wikipedia.org/wiki/List_of_screw_and_bolt_types

    A special type of bolt that is set into concrete, with screw threads protruding above the concrete surface to accept a nut. breakaway bolt: A breakaway bolt is a bolt with a hollow threaded shank, which is designed to break away upon impact. Typically used to fasten fire hydrants, so they will break away when hit by a car. Also used in aircraft ...

  8. ISO metric screw thread - Wikipedia

    en.wikipedia.org/wiki/ISO_metric_screw_thread

    A metric ISO screw thread is designated by the letter M followed by the value of the nominal diameter D (the maximum thread diameter) and the pitch P, both expressed in millimetres and separated by a dash or sometimes the multiplication sign, × (e.g. M8-1.25 or M8×1.25). If the pitch is the normally used "coarse" pitch listed in ISO 261 or ...

  9. Nut (hardware) - Wikipedia

    en.wikipedia.org/wiki/Nut_(hardware)

    Nut (hardware) An M4 nut threaded onto an Allen key socket head screw. A nut is a type of fastener with a threaded hole. Nuts are almost always used in conjunction with a mating bolt to fasten multiple parts together. The two partners are kept together by a combination of their threads' friction (with slight elastic deformation ), a slight ...