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2. Nut (hardware) - Wikipedia

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

   Sex bolt: Barrel nut, barrel bolt, binding barrel, Chicago screw, post and screw or connector bolt Has a barrel-shaped flange and protruding boss that is internally threaded Split nut: Split lengthwise into two pieces (opposed halves) so that its female thread may be opened and closed over the male thread of a bolt or leadscrew Sleeve nut ...

3. List of screw and bolt types - Wikipedia

   en.wikipedia.org/wiki/List_of_screw_and_bolt_types

   sex bolt, Chicago screw: 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 ...

4. 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 ...

5. ISO 898 - Wikipedia

   en.wikipedia.org/wiki/ISO_898

   This standard is the origin for other standards that define properties for similar metric fasteners, such as SAE J1199 and ASTM F568M. [1] It is divided into five (nonconsecutive) parts: 1. Bolts, screws and studs with specified property classes – Coarse thread and fine pitch thread [2] 2. Nuts with specified proof load values – Coarse ...

6. List of DIN standards - Wikipedia

   en.wikipedia.org/wiki/List_of_DIN_standards

   ISO general purpose metric screw threads – Part 12: 1 to 300 mm diameter coarse and fine pitch threads Selected diameters and pitches: Active: DIN 13-13: ISO general purpose metric screw threads – Part 13: Selected sizes for screws, bolts and nuts from 1 to 52 mm screw thread diameter and limits of sizes: Active: DIN 13-19

7. Bolt (fastener) - Wikipedia

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

   Bolts use a wide variety of head designs, as do screws. These are designed to engage with the tool used to tighten them. Some bolt heads instead lock the bolt in place, so that it does not move and a tool is only needed for the nut end. Common bolt heads include hex, slotted hex washer, and socket cap.