The Adaptall Series 9023 Straight Male NPT x Female BSPP hydraulic adapters, made of carbon steel, are used to connect pipes in hydraulic systems for fluid and gas transfer. NPT (National Pipe Taper) connections feature tapered threads that create a leak-proof seal by deforming the threads together. This design is ideal for permanent installations but is not recommended for frequent disassembly due to wear on the threads. BSPP (British Standard Pipe Parallel) connections, which are often used with parallel threads, seal through a combination of metal-to-metal contact and O-rings, offering a reliable, leak-proof connection. A standard BSPP connection uses a flat face and a captive seal, while a BSPP 60-degree flare uses a 60-degree seating angle to enhance sealing, often used in higher pressure systems where a more robust seal is needed. This adapter allows the connection of NPT and BSPP fittings, ensuring secure, long-lasting hydraulic system performance.