Manufactured by Dorman, part number 45384. Universal Thread Cutting Nuts. Pack of 12, Thread Size: 1/8, 3/16, 1/4, 5/32, 5/16 Inch Free Shipping is for continental USA only. If you live in Alaska, Hawaii, or PR please contact us for a shipping quote before bidding. All items are sold as shown. Since we offer free shipping we will ship the items the cheapest most cost effective way possible.