The Series SS9021 Straight Male BSPP x Female JIC Swivel hydraulic adapters, made from stainless steel, connect a British Standard Pipe Parallel (BSPP) male fitting to a female Joint Industry Council (JIC) fitting. BSPP fittings, similar to NPT, use parallel threads and rely on metal-to-metal sealing, often enhanced with an O-ring for additional leak prevention. The BSPP male threads have a different pitch and form compared to NPT, and sealing occurs through distortion of the threads, so thread sealant is recommended. The female JIC fitting features a 37-degree flare seating surface, providing a mechanical seal between the male and female components. These adapters are widely used in fluid power systems and are ideal for high-pressure applications, offering reliable, leak-free connections. The thread sizes are measured in fractional dimensions, with BSPP designated by "G" for parallel threads, such as G 1/4 for BSPP 1/4-19.