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Help me with this answer on HELI COILS

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  • Help me with this answer on HELI COILS

    Bought special 7/8-20 heli-coil inserts and called all over the country trying to figure out drill bit size to install them, does anybody have a clue?? Outside of inserts measure
    1.033. Could i just sqeeze insert together and measure root or dept of thread?? Now where do i find a tap then?? Help!! email me anytime, please at [email protected]

  • #2
    Re: Help me with this answer on HELI COILS

    7/8 x 20 is a British Cycle thread.

    You can buy a tap here - British Tools & Fasteners - TAP BSC 7/8 x 20 B - (5755)

    If you give him a call at 315 946 9400, Jon may be able to help you with a drill bit size for that thread.
    --
    Lance Caswell
    Caswell Inc
    http://www.caswellplating.com
    Need Support? Visit our online support section at http://support.caswellplating.com

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