Straight Male NPT x Male BSPT hydraulic adapters are fittings used to connect pipes for fluid and gas transfer. NPT (National Pipe Taper) connections use tapered threads to create a tight, metal-to-metal seal, making them ideal for permanent assemblies but not recommended for frequent disassembly due to thread wear. BSPT (British Standard Pipe Taper) connections, similar to NPT, also use tapered threads, but they have a different thread pitch and require thread sealants to ensure a leak-tight fit. These adapters are commonly used in applications where secure, long-lasting connections are needed for fluid transfer.