OS MAX III crankshaft thread

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  • 04/26/2016 at 10:12 am #74077
    Daniel Hopkins
    Participant

    All,
    What is the thread on the crankshaft for an OS max .15 III. I believe the diameter is 7mm. Or what is the part number for a Dubro prop nut that would suit.
    Thanks,
    dlh98370

    04/27/2016 at 10:58 am #77084
    Norm Furutani
    Participant

    This was a topic here a few years ago. Can’t figure out how to do a search on the new forum. Might have some info in the shop, will check back later.

    Norm

    04/27/2016 at 6:53 pm #77086
    SIMON BLAKE
    Participant

    I believe it’s a 7/32-32 thread. Goldberg used to make a spinner nut, but they’re not available anymore. Tru-Turn has that size. Also, Bob Mattes makes them.

    04/27/2016 at 7:04 pm #77087
    Bruce Hannah
    Participant

    I have used a 12-32 HS plug tap

    04/27/2016 at 7:22 pm #77088
    Steve Jensen
    Participant

    7/32 x 32UNF or 5.5mm x .8 pitch

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