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Thread: Thread sizes ...

  1. 02-04-2018, 11:53 AM #1
    ELSPORTO
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    Thread sizes ...

    I'm looking in the PET manual and there is a pan head screw size listed as "A M 5 x 12"

    Does anyone know what the "A" denotes?

    Ben.
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  2. 02-04-2018, 12:02 PM #2
    dirk07
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    It´s the head type

    http://www.jud.co.at/walter/DIN74%20...0Schrauben.PDF
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  3. 02-04-2018, 01:53 PM #3
    uai
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    This is quite common to german DIN designations. E.g. Washers DIN 125 A witout chamfer vs DIN 125 B which has a small chamfer.
    What Dirk referred to are counterbores according to DIN74 where the first character differntiates the shape (and therewith the type of screw) and the second the tolerance.
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  4. 02-04-2018, 02:49 PM #4
    gled49
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    Does the screw have a part number? I have a Porsche DIN booklet that converts part numbers. Gordon
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  5. 02-04-2018, 05:24 PM #5
    ELSPORTO
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    The part number is 900 014 058 02

    It's one of 5 pan head screws for the fuel sender collar - AM 5 X 12

    I actually need to tap one of the threads and was assuming 5mm thread width and 12mm length.

    Hoping there maybe additional info on the actual thread count or size ....
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  6. 02-04-2018, 07:20 PM #6
    9er
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    Fuel sender collar 5x 0.8, length not so much of an issue.
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  7. 02-04-2018, 07:35 PM #7
    ELSPORTO
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    Thanks Chris - so 0.8 is what exactly?
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  8. 02-04-2018, 08:47 PM #8
    Jon B
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    Quote Originally Posted by ELSPORTO View Post
    so 0.8 is what exactly?
    According to Chris, the thread pitch (P) is 0.8 mm.



    Jon B.
    Vista, CA
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  9. 02-05-2018, 12:18 AM #9
    ELSPORTO
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    Gotcha - thanks Jon B and all.

    Chris - where did you find the pitch info specific to that part? Just want to be 100% sure before I tap .... !

    Ben.
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  10. 02-05-2018, 02:27 AM #10
    uai
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    If there is no additional Info on pitch it's a standard metric.
    Fine threads have the added pitch info but pay attention as they are rarely use the abreviation MF (=Metric Fine) mostly it's just M<nominal-diameter>x<pitch> e.g. M12x1,5
    For more infos
    http://gewinde-normen.de/iso-regelgewinde.html
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