The TAP EXT SP(20) 5/16-18X6 H3 from Field Tool Supply is a high-quality tap designed for precision threading in various materials. This tap features a 5/16-18 thread size and a length of 6 inches, making it ideal for extended reach applications. Crafted from durable high-speed steel (HSS), it ensures longevity and resistance to wear. The H3 designation indicates a high tolerance for precision work, suitable for both professional and DIY projects. This tap is compatible with standard threading machines and manual tools, adhering to industry standards for quality and performance.