The Adaptall Series 8008 Straight Male BSPT x Male NPT hydraulic adapters are made of brass and are used to connect pipes for fluid and gas transfer. NPT (National Pipe Taper) connections feature tapered threads that seal by metal-to-metal contact, creating a strong, permanent connection. These are ideal for single-use applications but not recommended for frequent disassembly due to potential wear on the threads. BSPT (British Standard Pipe Taper) connections also have tapered threads, similar to NPT, but with different thread pitches, requiring thread sealants to ensure a secure, leak-proof seal. These adapters are typically used in applications where durable and reliable fluid transfer connections are needed.