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  2. List of drill and tap sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_drill_and_tap_sizes

    Below is a comprehensive drill and tap size chart for all drills and taps: Inch, imperial, and metric, up to 36.5 millimetres (1.44 in) in diameter. In manufactured parts, holes with female screw threads are often needed; they accept male screws to facilitate the building and fastening of a finished assembly.

  3. Tap and die - Wikipedia

    en.wikipedia.org/wiki/Tap_and_die

    where is the tap drill size, is the major diameter of the tap (e.g., 10 mm for a M10×1.5 tap), and pitch is the pitch of the thread (1.5 mm in the case of a standard M10 tap) and so the correct drill size is 8.5 mm. This works for both fine and coarse pitches, and also produces an approximate 75% thread.

  4. Tuning mechanisms for stringed instruments - Wikipedia

    en.wikipedia.org/wiki/Tuning_mechanisms_for...

    Tuning pins are used on instruments where there is no space for a knob on each string, such as pianos and harps. Turning the peg or pin tightens or loosens the string. Some tuning pegs and pins are tapered, some threaded. Some tuning pegs are ornamented with shell, metal, or plastic inlays, beads (pips) or rings.

  5. Machine head - Wikipedia

    en.wikipedia.org/wiki/Machine_head

    A machine head (also referred to as a tuning machine, tuner, or gear head) is a geared apparatus for tuning stringed musical instruments by adjusting string tension. Machine heads are used on mandolins, guitars, double basses and others, and are usually located on the instrument's headstock .

  6. Washer (hardware) - Wikipedia

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

    Fender washer (US), penny washer, mudguard washer, or "repair washer" (UK) A flat washer with a particularly large outer diameter in proportion to its central hole. These are commonly used to spread the load on thin sheet metal, and are named after their use on automobile fenders. They can also be used to make a connection to a hole that has ...

  7. Counterbore - Wikipedia

    en.wikipedia.org/wiki/Counterbore

    In machining, a counterbore (symbol: ⌴) is a cylindrical flat-bottomed hole that enlarges another coaxial hole, or the tool used to create that feature. A counterbore hole is typically used when a fastener, such as a socket head cap screw or fillister head screw, is required to sit flush with or below the level of a workpiece's surface.

  8. Pipe organ tuning - Wikipedia

    en.wikipedia.org/wiki/Pipe_organ_tuning

    The techniques for tuning flue pipes vary with the construction of the pipe: An open metal pipe usually has a sliding collar ("tuning slide") at the top of the pipe that can be moved to change the pitch. An open wooden pipe may have a metal flap partially covering its top, which can be rolled or unrolled, or bent upward or downward.

  9. Countersink - Wikipedia

    en.wikipedia.org/wiki/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 common angles, which are 60°, 82°, 90 ...