The 5/16UNFx1. Socket Countersunk Head Screw (GR-10.9) from Qualfast is designed to provide reliable fastening solutions for a variety of applications. Crafted with high-quality materials, these screws ensure durability and strength, making them ideal for both professional and DIY projects. The countersunk head design allows for a flush finish, enhancing the aesthetic appeal of your work while maintaining structural integrity. With their robust construction, these screws are perfect for use in demanding environments, ensuring long-lasting performance and peace of mind in your fastening needs. Features: Material: Alloy Steel Thread: UNF Thread Size: 5/16 Driving Features: Hexagon Socket Head Shape: Counter Head Length: 1in Grade: 10.9 Surface Treatment: Plain Applications: - Ideal for securing metal components in machinery and equipment. - Suitable for use in construction projects requiring high-strength fastening.