Harley Davidson Exhaust Flange Nut Size

Any help is much appreciated.
Harley davidson exhaust flange nut size. Next Full size. 1200 Exhaust Pipe Bracket. James Exhaust Flange Nuts 8-Pack.
Not only that but we have them. Using the supplied 516-18 x 58 flange bolts and nut plate bolt the header to the muffler bracket. Everbuilt Stainless Steel Exhaust Stud Kit With Flange Nuts Compatible for Harley Davidson Models From 1984-2018 including Big Twin Sportster XL Etc.
Fits well no modification needed. Flange Head Acorn Nut 516-18 UNC. Smitty67 Jun 23 2009.
What size are Harley exhaust flange nuts. Dealer installed my hooker pipes went to hoop on the bike today and found that my two rear nuts were gone what size are they. That 120 ft-lb or in-lb is the upper limit.
Fit Road Glide Road King Electra Glide. Dont have the right size in my junk draw Help please. These are the ones rite off the head studs look like 12 fine thread.
Tighten cylinder port exhaust flange nuts on front and rear cylinders while making sure pipes are. The bike bandit part number is 467658 1678478-001 but it doesnt tell me the size of the nut ex. Additionally tighten the head pipe support bracket bolts as indicated in the exhaust manufacturers instructions.