The 4.000 Coupling, with dimensions of .188X5 P42, is a reliable connector from Dresser Industries designed for A/C applications. This coupling is constructed from high-quality materials, ensuring durability and resistance to environmental factors. Its precise sizing allows for seamless integration with standard piping systems, facilitating easy installation. The coupling meets industry standards for performance and reliability, making it suitable for both residential and commercial use. Ideal for HVAC systems, this coupling provides a secure and efficient connection.