The STI TAP RH 4-40 GH1 B USA from Field Tool Supply is a precision tap designed for creating threads in various materials. With a 4-40 thread size, it is ideal for applications requiring fine threading. Made from high-speed steel (HSS), this tap offers excellent durability and wear resistance. The right-hand spiral design ensures efficient chip removal, making it suitable for both professional and DIY projects. This tap meets industry standards for quality and reliability, making it an essential tool for machinists and hobbyists alike.