Got some nuts off eBay, they're the wrong size. They're not marked as Campy, but look like the style. They seem to be 9mm -they screw on a few turns before sticking badly-I'm pretty certain the TPI is off. Did the seller accidentally sell me a nut for the Shimano Dura Ace, which are 9mm x 1mm (25.4 TPI)? Is that why they'd go on a few turns before jamming?