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  2. Engineering drawing abbreviations and symbols - Wikipedia

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

    The issuance of a drawing from the engineering/design activity to the production activity. In other words, the event when a draft becomes a completed, official document. A stamp on the drawing saying "ISSUED" documents that RTP has occurred. RTV: room-temperature vulcanizing; return to vendor: 1. RTV sealants, a way to seal joints. 2.

  3. BS 8888 - Wikipedia

    en.wikipedia.org/wiki/BS_8888

    BS 8888 performs three fundamental tasks : Unifying all the ISO standards applicable to technical specification; Giving an index of ISO standards involved with different principles of technical product specification (TPS);

  4. Technical drawing - Wikipedia

    en.wikipedia.org/wiki/Technical_drawing

    The drafter uses several technical drawing tools to draw curves and circles. Primary among these are the compasses, used for drawing arcs and circles, and the French curve, for drawing curves. A spline is a rubber coated articulated metal that can be manually bent to most curves.

  5. Technical drawing tool - Wikipedia

    en.wikipedia.org/wiki/Technical_drawing_tool

    Drafting tools may be used for measurement and layout of drawings, or to improve the consistency and speed of creation of standard drawing elements. Tools such as pens and pencils mark the drawing medium. Other tools such as straight edges, assist the operator in drawing straight lines, or assist the operator in drawing complicated shapes ...

  6. Taper pin - Wikipedia

    en.wikipedia.org/wiki/Taper_pin

    Some taper pins have a male screw thread on the small end that is designed to project through the hole and retain the pin with a washer and a nut.Other pins are threaded on both ends, on the thick end to pull the pin out with the same nut that holds the pin in place.

  7. 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.

  8. Countersink - Wikipedia

    en.wikipedia.org/wiki/Countersink

    Side and end view of a 4-fluted countersink. The fluted countersink cutter is used to provide a heavy chamfer in the entrance to a drilled hole. This may be required to allow the correct seating for a countersunk-head screw or to provide the lead in for a second machining operation such as tapping. Countersink cutters are manufactured with six ...

  9. Total indicator reading - Wikipedia

    en.wikipedia.org/wiki/Total_indicator_reading

    Whereas dial test indicators will give a foreshortened reading if their tips are on an angle to the surface being measured (cosine error), a drawing callout of FIM is defined as referring to the distance traveled by the extremity of the tip—not by the lesser amount that its lever-like action moves the needle.