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IndustryArena Forum > MetalWorking > MetalWork Discussion > Need 3 Wire Measuring Formula for Metric Trapezoidal Threads

Thread: Need 3 Wire Measuring Formula for Metric Trapezoidal Threads

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  1. 04-15-2014, 12:57 AM #1
    MetalZilla
    MetalZilla is offline Registered
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    Need 3 Wire Measuring Formula for Metric Trapezoidal Threads

    Hello all,

    does anyone out there now where I can get the formula for measuring Metric 30° Trapezoidal Threads using the 3 wire method? I have been able to find the "Best Wire" formula but nothing else.
    Thanks for any help you can give.
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  2. 04-20-2014, 01:12 AM #2
    juergenwt
    juergenwt is offline Registered
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    Re: Need 3 Wire Measuring Formula for Metric Trapezoidal Threads

    You need a DIN 103 / ISO 2901, 02, 03, 04-1977 in English. I don't think there is a 3-wire measurement available. You may also need to know the required tolerance field.
    Anything in your (new) MH?
    Some help here: Trapezoidal Coarse Thread DIN 103

    At least you will have the bolt dia (inner dia).
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