The Series 5000 Straight Female NPT x Female NPT Rigid adapters in brass are high-quality fittings designed to connect pipes using NPT (National Pipe Tapered) threads, a U.S. standard that has been in use for over 100 years. These tapered threads create a secure, leak-proof seal by deforming the metal threads as they tighten, making them ideal for fluid and gas transfer applications. NPT connections are best for single-assembly installations and should not be frequently disassembled. To ensure a reliable seal, it's recommended to use a thread sealant and avoid over-tightening. Made from brass, these adapters are suitable for low-pressure systems, providing durable and efficient connections in various industrial applications.