2014 1200C. I'm on a road trip, not close to a dealer or tech. Both nuts have fallen off of the piece that attaches the exhaust pipe to the engine itself, I need to make an emergency hardware store trip to replace them.

I looked in the shop manual and saw torque values, but not sizes.

I think these are called the exhaust flange nuts, but I'm not sure... including a pic:

 

See this thread...https://www.hdforums.com/forum/sport...lange-nut.html it also refers to another thread, but both said it was 5/16 X 24

Another forum site thread also indicated 5/16-24 Flange Nut (HD Part #7593)

 

Yes, 5/16-24 flange nut. Unlikely you'll find a flange nut that size at a hardware store.. If not, just use 5/16-24 nuts with lock washers. That'll get you home.

 

Awesome, thanks for the quick help!