Our Series 9040 Straight Male BSPP x Male BSPP hydraulic rigid bulkhead adapters, made from durable carbon steel, are designed for secure, leak-proof connections in hydraulic systems. These adapters feature British Standard Pipe Parallel (BSPP) threads, similar to NPT but with a slightly different thread pitch and form. They rely on metal-to-metal angled surfaces or a combination of metal and an O-ring to create a captive seal, ensuring a tight fit and preventing leaks. The adapters also include a flareless female swivel BSPP connection, where the seal occurs on the male connector’s cone seat. These bulkhead adapters are ideal for applications where a secure, long-lasting connection is needed. Thread sizes are expressed as fractional dimensions (e.g., G 1/4 for BSPP 1/4-19), making them versatile and easy to identify.