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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. Split beam nut - Wikipedia

    en.wikipedia.org/wiki/Split_beam_nut

    A split beam nut, also known as a split hex nut [1] or slotted beam nut, [2] is a locknut with slots cut in the top that separate the outside end into two [3] or more sections that are bent slightly inward, making the thread diameter undersized in the slotted portion.

  4. Bolted joint - Wikipedia

    en.wikipedia.org/wiki/Bolted_joint

    Holes are drilled in nuts and bolt heads, and wire is threaded through the holes to prevent back-rotation. This method of locking is labor intensive, but is still used on critical joints. [1] Locknuts Some portion of the nut deforms elastically during tightening to provide a locking action. Spring washers and lock washers

  5. List of screw and bolt types - Wikipedia

    en.wikipedia.org/wiki/List_of_screw_and_bolt_types

    The German standard is DIN 571, Hexagon head wood screws. Lag bolts are usually used with an expanding insert called a lag in masonry or concrete walls, the lag manufactured with a hard metal jacket that bites into the sides of the drilled hole, and the inner metal in the lag being a softer alloy of lead, or zinc alloyed with soft iron.

  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 DIN standards - Wikipedia

    en.wikipedia.org/wiki/List_of_DIN_standards

    Steel hexagon nuts with large widths across flats for high-strength structural bolting: Withdrawn: DIN EN 14399-4: EN 14399-4: DIN 6916: Round washers for high-strength structural steel bolting: Withdrawn: DIN EN 14399-6: EN 14399-6: DIN 6921: Hexagon flange bolts: Withdrawn: DIN EN 1665: EN 1665: DIN 6922: Hexagon flange bolts with reduced ...

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