O0ps! Sorry Ed, here is just one place you can get whatever riv-nut OR commonly also called a "jack nut". This is where I get all my hardware and numerous misc. stuff- Ask for Rick and tell him you are building a Cobra-he'll groan and then smile and take care of you.
Kimball Midwest: The total product source for maintenance and repair operations. Phone 1-800-233-1294, 4800 Roberts Rd. Cols 43228 (They ship world wide)
Nut-Zerts,Jack nuts:
Kimball Midwest: Product Catalog
DV