These oval head stainless steel screws and nuts are used in conjunction with one another in order to fasten metal parts together securely. To ensure proper fit and quality of life, make sure to use the Hillman Stainless Steel Oval-head Phillips Machine Screw with nuts of similar thread size and finish. A machine screw is a fastening screw with a machine-cut thread throughout the length of its shank. Fasten with a screwdriver to reduce risk of over-tightening and protect the screw and fastened material. The length of a oval head screw is measured from under the head to the point of the screw. 1/4 in.-20 USS coarse thread; measures 1 in. L Part of the Hillman Deep Drawer program Stronger thread than wood screws, made finer and more precisely If nuts are needed, use with nuts of the same finish and threading Fasten machine screw with screwdriver to reduce risk of over-tightening Stainless steel finish makes screw perfect for exterior and most marine applications Use oval head screw to fasten metal parts together Use oval head stainless steel screws for any indoor or outdoor projects