Our Series 9044 Straight Female BSPP x Female NPT Rigid adapters are fittings designed to connect British Standard Pipe Parallel (BSPP) and National Pipe Tapered (NPT) threaded components in fluid and gas systems. BSPP threads are parallel, providing a captive seal through metal-to-metal contact or a combination of metal-to-metal and O-ring seals. NPT threads, a U.S. standard, create a secure seal by deforming the threads as they tighten. These adapters are ideal for applications where BSPP and NPT systems need to be joined, but it’s important to use thread sealants for optimal sealing due to the thread deformation in both types. BSPP threads are similar to NPSM male connections, while NPT is widely used for its reliable, leak-free performance. Available in materials such as brass for low-pressure and stainless steel for high-pressure applications, these adapters ensure durability and secure connections in industrial environments.