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2. List of drill and tap sizes - Wikipedia

   en.wikipedia.org/wiki/List_of_drill_and_tap_sizes

   Example (inch, coarse): For size 7 ⁄ 16 (this is the diameter of the intended screw in fraction form)-14 (this is the number of threads per inch; 14 is considered coarse), 0.437 in × 0.85 = 0.371 in. Therefore, a size 7 ⁄ 16 screw (7 ⁄ 16 ≈ 0.437) with 14 threads per inch (coarse) needs a tap drill with a diameter of about 0.371 inches.

3. List of welding codes - Wikipedia

   en.wikipedia.org/wiki/List_of_welding_codes

   Welding - Studs and ceramic ferrules for arc stud welding: ISO 13919-1: Welding - Electron and laser-beam welded joints - Guidance on quality level for imperfections - Part 1: Steel ISO 13919-2: Welding - Electron and laser-beam welded joints - Guidance on quality level for imperfections - Part 2: Aluminium and its weldable alloys ISO 13920

4. Symbols and conventions used in welding documentation

   en.wikipedia.org/wiki/Symbols_and_conventions...

   The symbolic representation of a V weld of chamfered plates in a technical drawing. The symbols and conventions used in welding documentation are specified in national and international standards such as ISO 2553 Welded, brazed and soldered joints -- Symbolic representation on drawings and ISO 4063 Welding and allied processes -- Nomenclature of processes and reference numbers.

5. C-clamp - Wikipedia

   en.wikipedia.org/wiki/C-clamp

   A C-clamp or G-clamp or G-cramp is a type of clamp device typically used to hold a wood or metal workpiece, and often used in, but are not limited to, carpentry and welding. . Often believed that these clamps are called "C" clamps because of their C-shaped frame, or also often called C-clamps or G-clamps [1] because including the screw part, they are shaped like an uppercase lette

6. List of DIN standards - Wikipedia

   en.wikipedia.org/wiki/List_of_DIN_standards

   Hose clamps with worm gear drive; shape A, DIN 3017-2: Hose clamps – Part 2: Clamps with fastening lugs, DIN 3017-3: Hose clamps – Part 3: Bolt clamps, DIN 3017-4: Hose clamps – Part 4: Technical delivery conditions, DIN 3017-5: Hose clamps – Part 5: Wide strip hose clamps with fastening lugs; Types D and E, DIN 3113: Combination Wrench ...

7. CEE 7 standard AC plugs and sockets - Wikipedia

   en.wikipedia.org/wiki/CEE_7_standard_AC_plugs...

   The earth pin is centred between the apertures, offset by 10.2 mm (0.402 in). The plug (which is often, in error, also referred to as CEE 7/5) has two round pins measuring 4.8 by 19 mm (0.189 by 0.748 in), spaced 19 mm (0.748 in) apart and with an aperture for the socket's projecting earth pin.