The 4 Brass Insert (.040) by Fittings Unlimited Inc is designed for reliable connections in plumbing and HVAC applications. With a .040 diameter, this brass insert ensures compatibility with a range of fittings. Its robust construction offers excellent resistance to corrosion, making it ideal for long-term use in various environments. The insert is easy to install, fitting seamlessly into existing systems. This product adheres to industry standards, ensuring safety and reliability in all applications.