Discover the ultimate solution for secure fastening with our Hex Washer Head Screw. Crafted from Grade 5 steel and coated in durable zinc, this screw is designed to withstand tough conditions while ensuring a reliable hold. With a thread size of 5/16-18 and a length of .625 inches, it's perfect for a variety of applications. The ASME B18.6.3 specification guarantees its quality, making it a top choice for professionals and DIY enthusiasts alike. Upgrade your toolkit with this essential component for your projects, knowing it's not only high-performing but also environmentally friendly with RoHS compliance.