The Series 1405 Straight Female NPT x Female NPT Swivel adapters in stainless steel are durable fittings designed to connect pipes with NPT (National Pipe Tapered) threads, a widely used U.S. standard for over 100 years. These tapered threads create a secure seal by deforming the metal threads as they tighten, ensuring effective fluid and gas transfer. The swivel feature allows for easier alignment during installation. NPT connections are best suited for single-assembly applications, as they are not designed for frequent disassembly. Over-tightening should be avoided, and a thread sealant is recommended for optimal performance. Made from stainless steel, these adapters are ideal for high-pressure systems, offering reliable, leak-free connections across various industries.