The 2 National Pipe Thread x 2 1/2 National Standard Thread Brass Adapter is designed to connect a male NPT (National Pipe Thread) pipe fitting to a female NST (National Standard Thread) hose or equipment. This adapter is typically used in firefighting systems, industrial applications, and water transfer systems. The NPT side features a tapered thread for a tight seal, while the NST side connects securely to fire hoses or other equipment with NST threads. Made from high-quality brass for corrosion and wear, making it suitable for use in outdoor environments.