A BSPP-M x BSPP-M male hex reducing nipple is used to connect two female BSPP-threaded ports of different sizes, allowing a reduction in pipe diameter within a hydraulic or piping system. It features male British Standard Pipe Parallel (BSPP) threads on both ends and a hexagonal centre section for easy tightening and removal with standard tools.
BSPP threads provide a mechanical connection and typically seal using a bonded seal, O-ring, or washer, rather than thread interference. These fittings are widely used in hydraulic, pneumatic, instrumentation, and industrial fluid transfer applications where reliable, leak-free connections are essential.

