The PT Coupling GJMST400 is a 4-inch shake x 4-inch threaded coupling, ideal for connecting pipes in various fluid transfer applications. This coupling is constructed from high-quality materials that ensure durability and resistance to corrosion. Its design allows for easy installation and a secure fit, making it suitable for both industrial and commercial use. The dimensions are optimized for standard piping systems, and it complies with relevant industry standards for safety and performance. This coupling is a reliable choice for professionals seeking efficient fluid handling solutions.