binding post replacement nuts


Hello,

Misplaced the binding post nuts (if that's even what they're called )for my speakers. Looked everywhere, and can't seem to find replacement nuts on any site, and a simple nut from the hardware store won't fit as the thread pitch is very very fine on the binding posts.

Speakers are Infinity Intermezzo 2.6p the passive version so the nuts completely screw off the post.

I have tried nuts from about 8 other speakers I own, and nothing seems to fit right.

Suggestions as to where to find nuts, OR do I have to buy a whole new set of binding posts that come with the nuts.

Thanks!
See pictures for nuts and dimensions.

https://drive.google.com/open?id=16mEUtjTxmIfSnCl1BpYBvFt0PRnnId-w
stevethe4th

Showing 3 responses by sfar

Have you determined whether the nuts and their posts are SAE or metric? It's difficult to tell at a glance and the diameters of standard sizes can appear almost identical, but the thread pitch is different. Go to a Home Depot or Lowes and buy one each of all the nuts in both SAE and metric that seem to come closest to matching the size of the nut you need. 
I can't read the markings on the ruler in the picture very well but if it is metric it's likely to be M8, M10 or M12, but impossible to know whether it's coarse or fine thread without some very precise measuring, or getting nuts of each diameter and pitch to try.

https://www.carrlane.com/en-us/engineering-resources/technical-information/design-standards-and-engineering-information/inch-and-metric-thread-standards