The TAP OP-3 UF(20)5/16-18 H3 B from Field Tool Supply is a high-quality tap designed for creating 5/16-18 threads. This right-hand tap is constructed from durable high-speed steel, ensuring longevity and reliability in demanding applications. The H3 thread form provides compatibility with a variety of materials, making it ideal for both professional and DIY use. Its precision design allows for smooth cutting and reduced friction, resulting in clean threads and extended tool life. Perfect for those seeking high-quality threading solutions, this tap is a valuable addition to any toolkit.