Go to http://www.amkproducts.com/Catalog_PDF.htm

For double ended studs, click on catalog page 129 and see part B-11007.

For Keps nuts, page 53, part B-13242.

These connections have thick and thin galvanized washers used as shims to move the fenders in/out. See page 181, parts B-13014 and B-13740.

The stud and nut are exact Chrysler reproductions. The washers are similar - not the same O.D., but they are hidden.

FWIW, most vendors who sell reproduction Chrysler fasteners are just re-selling AMK stuff.