Listing is for one set of six (6) Grade 8 Plated (UNC Course Thread) Hex Head Cap Screws, 1/2-13 x 3-1/2", Partially Threaded, AMSE B18.2.1, Head Type : Hex, Thread Length 1-1/4", Head Height 5/16", Head Width 3/4", Package Quantity 6. Specifications Grade 8 Hex Head Cap Screw 1/2" Diameter - 13TP (UNC Course Thread) 3-1/2" Length Plated to resist rusting We sell many hardware parts at very competitive pricing. If you don't see the parts you need listed please contact us we would love to earn your business. We are listing new items frequently so please check our store often. We stock a wide variety of replacement parts for Agricultural Equipment please contact us if you have any questions or if you would like more information.