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  1. #1

    Join Date
    Aug 2010
    Posts
    2,363

    Default Shovelhead pulley nut thread size?

    Long story short- Need to buy a nut asap and I'm at work so i cant measure it. I'd orderd one from JP monday, and it said in stock, looked up tracking today and now it says it wont ship for 11-14 days, no good. So i need to order one from Mcmaster or pick one up from the hardware store today. Anyone know the thread size? Thanks guys. Googling I can only find the socket size needed, not the actual thread size.

  2. #2

    Join Date
    Sep 2010
    Posts
    12,924

    Default

    I'm assuming that your talking about the motor sprocket shaft...???
    Also assuming that you are running a belt drive...???

    Am I close ..??

  3. #3

    Join Date
    Aug 2010
    Posts
    2,363

    Default

    yes, motor shaft, splined, with a belt drive.

  4. #4

    Join Date
    Apr 2011
    Posts
    1,341

    Default

    I'm 90% sure its 7/8-14.

    IDK if it was just mine, but I had to get a handful of nuts to find one that would spin on freely. I have a colony part that wouldn't thread on - felt like it was mixing thread pitches. I then bought 4 different nuts and only one of them would spin on. Not trying to gorilla a nut onto fine threads on a sprocket shaft!

    Edit - confirmed 7/8-14
    Last edited by Blackbetty; 06-10-2016 at 8:52 AM.

  5. #5

    Join Date
    Aug 2010
    Posts
    2,363

    Default

    Thanks Man!

  6. #6

    Join Date
    Sep 2010
    Posts
    12,924

    Default

    Not all nuts are the same....

    Click image for larger version. 

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    The one above was made for belt drives...
    It has a much larger foot area over the Oem nuts meant for steel engine sprockets...



    Could get fancy if running a open belt drive with using these nuts...



    Last edited by Dragstews; 06-10-2016 at 9:43 AM.

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