Cost is $32 for a set of 20 Dorman M12x1.5 (OEM 3/4th genFbody and C4/C5/C6 size) open bulge lug nuts.
These are fully threaded, have high quality plating that won't flake off and jam a thread. They weigh 37grams each - and are steel - the only material that should ever be trusted to hold a wheel on, and cheap enough to life out every season or so.
I've got 15 sets of these, when they are gone I'll go back to charging for shipping.
I also have ARP studs in stock. 100-7708 2.5" long $32/5 pack. Buy the studs with a set of nuts and I'll do free shipping on the studs too
edit 2/13/18 ARP prices doubled, oof