The FUI B-IE-81-LB-04 is a specialized fitting known as the 4Nut, designed for secure connections in piping systems. This fitting is made from high-quality materials, ensuring durability and resistance to corrosion. Its unique design allows for easy installation and maintenance, making it ideal for various applications. The 4Nut fitting meets industry standards, providing compatibility with a range of systems. Its compact size and robust construction make it a reliable choice for both industrial and commercial use.