Machine 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 Flat-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. The length of these flat head machine screws is measured from under the head to the point of the flat head screw. Stainless steel, flat-head, Phillips-drive screw features #10-24 USS coarse thread; measure 1-1/2 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 flat head machine screws with screwdriver to reduce risk of over-tightening Stainless steel finish makes screw perfect for exterior and most marine applications Use machine screw to fasten metal parts together Use flat head screw for any indoor or outdoor projects