The Series 6506 Straight Stainless Steel Female NPT x Female JIC Swivel adapters are high-quality hydraulic fittings designed for fluid power systems. These adapters combine NPT (National Pipe Tapered) threads, commonly used for sealing pipes in fluid and gas systems, with JIC (Joint Industry Council) 37° flare connections, creating a secure mechanical seal. The NPT threads provide a reliable seal by tapering as they tighten, while the JIC fittings use 37° coned seats to ensure a leak-free connection with male flared components. Made from durable stainless steel, these adapters are ideal for high-pressure applications, offering superior performance in demanding environments where reliability and strength are essential.