This Hex Head Machine Screw is a durable and reliable fastening solution for various applications. Made of high-quality steel with a Geomet 147 finish coating, it offers excellent corrosion resistance and longevity. Featuring a 4-40 thread size and ASME B18.6.3 specification, it ensures precise and secure fastening. The hexagonal head design allows for easy installation with a hex driver. With a length of .375 inches, it is suitable for use in a wide range of projects. Additionally, it is ROHS compliant, making it environmentally friendly. Upgrade your fastening system with this premium quality machine screw.