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Tru-Pos Locators UNJF thread

John Riggins
Need to measure some threaded holes 1/4-28 UNJF.
Anyone know where I can find plugs for this thread to check location?
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  • Assuming you need to check all the threads with a go-no go just use:

    [url]www.mscdirect.com/FlyerView

    and measure a cone on the holder shaft and intersect it with a plane at the entry point

    PS order one no-go to check the threads

    As it is a "J" thread be sure you do not need to do H-28 single element thread form... then you will need Pratt or johnson gages

    I have found thread gages to be the most accurate and repeatable method for tight toleranced thread locations
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  • Assuming you need to check all the threads with a go-no go just use:

    [url]www.mscdirect.com/FlyerView

    and measure a cone on the holder shaft and intersect it with a plane at the entry point

    PS order one no-go to check the threads

    As it is a "J" thread be sure you do not need to do H-28 single element thread form... then you will need Pratt or johnson gages

    I have found thread gages to be the most accurate and repeatable method for tight toleranced thread locations
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