The 4" x 3-1/2" Black Nipple by Boshart Industries is a robust plumbing component designed for seamless connections in various piping systems. Constructed from high-strength black steel, this nipple is ideal for both residential and industrial applications. It features a threaded design for easy installation and is compatible with standard NPT connections. This product meets ANSI standards, ensuring reliability and safety in high-pressure environments. Perfect for use in water, gas, and oil applications, it provides a secure and leak-free connection.