Straight Male BSPP (British Standard Pipe Parallel) adapters are used to create secure, leak-proof connections in hydraulic systems. These fittings feature parallel threads, unlike NPT, and are designed to seal by distortion of the threads. They typically require thread sealants for a secure connection. BSPP male connectors create a captive seal using metal-to-metal surfaces or a combination of metal-to-metal and an O-ring, ensuring a reliable connection. The female BSPP swivel connector has a tapered nose flareless swivel that seals against the cone seat of the male fitting. While similar to NPSM connections, BSPP connectors are not interchangeable due to differences in thread pitch and dimensions. Thread sizes are commonly marked with the letter "G," indicating parallel threads, such as G 1/4 for BSPP 1/4-19. These adapters are essential for fluid power systems, offering durability and effective sealing.