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  1. #1
    Join Date
    Sep 2017
    Location
    Seven Hills
    Posts
    43

    Default Can anyone identify this tool?

    P1090563.JPG
    Can anyone tell me what this tool is used for?
    The box says 1 1/4" BSP cap screw gauge. I have another which is 1 3/4"
    I am cleaning out my father's garage and it is one of many items I cannot identify. Unfortunately I have limited knowledge in metalworking. Even "google" was no help.
    Thanks

  2. #2
    Join Date
    Jul 2010
    Location
    Brisbane
    Posts
    143

    Default

    I would guess it was something to do with plumbing or conduit.. BSP = British Standard Pipe !.. a thread used in the old metal water pipes or conduit fittings... cannot help much further.

  3. #3
    Join Date
    Jul 2016
    Location
    Melbourne
    Age
    35
    Posts
    1,522

    Default

    It's a style of go no go gauge i believe, your Bsp external thread goes in between the rollers and if it makes it past the first set but not the second its on size.

  4. #4
    Join Date
    Jan 2004
    Location
    Mackay North Qld
    Posts
    6,446

    Default

    The tool is also known as a snap gauge.


    Grahame

  5. #5
    Join Date
    Sep 2017
    Location
    Seven Hills
    Posts
    43

    Default

    Thanks, I have now been able to find it on the internet.

  6. #6
    Join Date
    Jul 2008
    Location
    Sydney Australia
    Age
    76
    Posts
    22

    Default

    Quote Originally Posted by caskwarrior View Post
    It's a style of go no go gauge i believe, your Bsp external thread goes in between the rollers and if it makes it past the first set but not the second its on size.
    Hi,

    This is correct. The idea is the machine operator (usually a thread rolling machine) can use it quickly to determine if thread size is correct, without having to make an actual measurement. Thread measurement is a more skilled process.

    Cheers

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