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  1. #1
    DPT
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    Looks too fine for 1/2-20 and if those calipers are correct then its more than likely 13x1

  2. #2
    Member Pop Shot's Avatar
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    Quote Originally Posted by DPT View Post
    Looks too fine for 1/2-20 and if those calipers are correct then its more than likely 13x1
    My 14x1 thread protector kinda screwed on the thread but was too loose. Anyone in Palmy have a 13x1 thread cap I can try?

  3. #3
    Member zimmer's Avatar
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    Top photo counts out to ~14 threads per 15.25mm = ~23 threads per 25.4mm
    Set your vernier to 12.7mm and count the threads and x by 2.

  4. #4
    Member Pop Shot's Avatar
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    Quote Originally Posted by zimmer View Post
    Top photo counts out to ~14 threads per 15.25mm = ~23 threads per 25.4mm
    Set your vernier to 12.7mm and count the threads and x by 2.
    I got 13 threads per 12.7mm. The last few mm is mainly the shoulder.

    Not sure what this means?

  5. #5
    DPT
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    Quote Originally Posted by Pop Shot View Post
    I got 13 threads per 12.7mm. The last few mm is mainly the shoulder.

    Not sure what this means?
    1mm pitch is 12.7 threads per 12.7mm length, so I think you are pretty spot on for 13x1

  6. #6
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    Quote Originally Posted by DPT View Post
    Looks too fine for 1/2-20 and if those calipers are correct then its more than likely 13x1
    You guys never heard of ISO?
    sako75 likes this.
    Boom, cough,cough,cough

  7. #7
    Member zimmer's Avatar
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    Quote Originally Posted by Maca49 View Post
    You guys never heard of ISO?
    Nah, everyone's still locked in the Imperial world
    With a very wee dash of eye-ometer error on behalf of the operator of the verniers I too would say the thread is as already suggested per DPT's post 13x1

 

 

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