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  2. Flange nut - Wikipedia

    en.wikipedia.org/wiki/Flange_nut

    A self-aligning nut, also known as a spherical nut [2] or leveling nut, is a type of nut used in applications where the fastener is not perpendicular to the surface to which the nut anchors. A flange nut is used inside a specially shaped dished-out washer. The device is commonly used in the aerospace industry.

  3. List of DIN standards - Wikipedia

    en.wikipedia.org/wiki/List_of_DIN_standards

    Hexagon flange bolts with reduced shank: Withdrawn: DIN EN 1665: EN 1665: DIN 6923: Hexagon nuts with flange: Withdrawn: DIN EN 1661: EN 1661: DIN 6924: Prevailing torque type hexagon nuts with nonmetallic insert: Withdrawn: DIN EN ISO 7040, DIN EN ISO 10512: ISO 7040, ISO 10512: DIN 6925: Prevailing torque type all-metal hexagon nuts ...

  4. Coupling nut - Wikipedia

    en.wikipedia.org/wiki/Coupling_nut

    A coupling nut A coupling nut and its orthographic view. A coupling nut, also known as extension nut, is a threaded fastener for joining two male threads, most commonly a threaded rod, [1] [2] but also pipes. [3] The outside of the fastener is usually hexagonal so a wrench can hold it.

  5. Nut (hardware) - Wikipedia

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

    The cage has two wings that when compressed allow the cage to be inserted into the square holes Clip-on nut: J-nut or U-nut, sheet metal nut, speed nut (ambiguously) Designed to be clipped to sheet metal Coupling nut: Extension nut A threaded fastener for joining two male threads, most commonly a threaded rod,[1][2] but also pipes Flange nut ...

  6. Engineering drawing abbreviations and symbols - Wikipedia

    en.wikipedia.org/wiki/Engineering_drawing...

    The Pitch Circle Diameter (PCD) is the diameter of that circle that passes through the center of all the bolt holes or wheel bolts or wheel rim holes or studs. The best example is Flanges, there are multiple holes in the Flanges, the circle through the center of these holes is known as the pitch circle, and the diameter of this circle is known ...

  7. List of screw and bolt types - Wikipedia

    en.wikipedia.org/wiki/List_of_screw_and_bolt_types

    A fastener comprising a mated pair of screw and post (binding barrel), 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.

  8. Bolted joint - Wikipedia

    en.wikipedia.org/wiki/Bolted_joint

    The thicker nut applies more force to the joint, first relieving the force on the threads of the thinner nut and then applying a force in the opposite direction. In this way the thicker nut presses tightly on the side of the threads away from the joint, while the thinner nut presses on the side of the threads nearest the joint, tightly locking ...

  9. List of screw drives - Wikipedia

    en.wikipedia.org/wiki/List_of_screw_drives

    A security hex screw drive features an extruded pin to make the fastener more tamper resistant by inserting a pin in the center of the female socket, requiring a tool with a corresponding hole to drive the fastener. This can also prevent attempts at turning the screw with a small flat-bladed screwdriver.