Shovelhead pulley nut thread size?

[vnygra]

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.

[Dragstews]

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

Am I close ..??

[vnygra]

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

[Blackbetty]

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

[vnygra]

Thanks Man!

[Dragstews]

Not all nuts are the same....



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...