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  2. Engineering drawing abbreviations and symbols - Wikipedia

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

    Commonly used when measuring the flat surfaces of a hex drive, such as a hex nut. AFF above finished floor A dimension that establishes a distance away from the finished floor. Example would be the top of a coffee table to the shag of the carpet, not where the bottom of the tables feet dig in. AISI: American Iron and Steel Institute

  3. 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 ...

  4. List of DIN standards - Wikipedia

    en.wikipedia.org/wiki/List_of_DIN_standards

    Hexagon slotted nuts and castle nuts with metric coarse and fine pitch thread – Product grades A and B: Active: DIN 935-2: M42 to M160x6 hexagon head nuts; product grade B: Active: DIN 935-3: Hexagon slotted nuts with metric coarse pitch thread – Product grade C: Active: DIN 936: M8 to M52 and M8x1 to M52x3 hexagon thin nuts; product grades ...

  5. 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.

  6. List of screw and bolt types - Wikipedia

    en.wikipedia.org/wiki/List_of_screw_and_bolt_types

    They may either have a Phillips flat head or a slotted hex washer head. Nominal (thread) sizes range from 0.1875 to 0.375 in (4.763 to 9.525 mm) and lengths from 1.25 to 5 in (32 to 127 mm). Typically an installer uses a hammer drill to make a pilot hole for each concrete screw and a powered impact driver to drive the screw. The drill hole ...

  7. List of ISO standards 3000–4999 - Wikipedia

    en.wikipedia.org/wiki/List_of_ISO_standards_3000...

    ISO 4160 Hexagon nuts and bolts with flange, style 1 — Small Series — Product grade B [Draft merged into ISO 4161 and ISO 4162] ISO 4161:2012 Hexagon nuts with flange, style 2 — Coarse thread; ISO 4162:2012 Hexagon bolts with flange — Small series — Product grade A with driving feature of product grade B

  8. Engineering tolerance - Wikipedia

    en.wikipedia.org/wiki/Engineering_tolerance

    The standard (size) tolerances are divided into two categories: hole and shaft. They are labelled with a letter (capitals for holes and lowercase for shafts) and a number. For example: H7 (hole, tapped hole, or nut) and h7 (shaft or bolt). H7/h6 is a very common standard tolerance which gives a tight fit.

  9. Clip-on nut - Wikipedia

    en.wikipedia.org/wiki/Clip-on_nut

    A G-nut, or G-style nut, is shaped like a "G" and clips to the edge of a sheet metal object. It is different from all of the other types in that it is meant to clip over a small flange on the edge of the sheet metal. The threads are from an integrated nut that has a special boss to sit in a hole in the sheet metal. [2]