Here is a box containing 5 pieces of original GENUINE GM PARTS- stainless skin covered chrome lug nuts for the 1965 thru 1974 BUICKS equipped with the BUICK " MAG" CHROME WHEELS. THESE ARE THE 1/2" THREAD AND ARE CORRECT FOR THE B/C/AND E SERIES BUICKS WHICH ARE THE BIG CARS=ELECTRAS/WILDCATS/RIVIERAS. Group Number 5.813 and Part Number 414187. SHIPPED GLOBALLY IN A 4" CUBE BOX USPS. THANKS FOR LOOKING.