Reply To: Tillotson Carb Brass Plugs

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April 12, 2022 at 9:00 pm #258095
amuller
Participant

    For a  taper that short you should be able to use the compound and not worry about a taper attachment.

    Don’t know if it would help, but British Standard Pipe (also the metric standard) compares with USS like this for “1/4” sizes:

    TPI  US:18, BSP: 19

    Major diameter US: .540, BSP:  .518  (Not sure the diameter was measured the same way.)  The thread form is also different, BSP using a Whitworth-like form.

    Other equivalent sizes have similar differences.