This AN816-16 adapter is a must-have for anyone looking to connect a pipe to a tube made of steel. With its straight design and 1.3125-12 UNJ to 1-11.5 size, it ensures a perfect fit for a seamless connection. The adapter is compatible with a wide range of aviation parts and accessories, making it a versatile choice for any application. Its high-quality construction guarantees durability and reliability, making it a top choice for professionals in the industry.