The TAPS LH(040) 5/8-12 GH3 B from Field Tool Supply is a high-quality left-hand tap designed for threading 5/8 inch diameter holes with a 12 threads per inch (TPI) specification. Constructed from durable high-speed steel, this tap provides excellent performance and longevity in metalworking applications. The GH3 tolerance ensures precise threading, making it ideal for both professional and hobbyist use. Its left-hand design is particularly useful for applications requiring reverse threading. This tap is a vital addition to any machinist's toolkit.