The Series 1502-SS 90-Degree Female NPTF x Female NPSM swivel elbow adapters are high-quality stainless steel fittings designed to provide secure, leak-free connections in hydraulic systems. These adapters feature a 90-degree angle, making them ideal for routing hoses and pipes in tight or confined spaces. One end is equipped with female NPTF (National Pipe Tapered Fuel) threads, which create a reliable, leak-proof seal through thread deformation, while the other end features female NPSM (National Pipe Straight Mechanical) threads, designed to form a mechanical seal using an O-ring or other sealing methods. The swivel elbow design allows for flexible installation, enabling easy adjustment and positioning of the connection. The difference between NPTF and NPSM threads is that NPTF threads are tapered and rely on metal-to-metal sealing, while NPSM threads are straight and rely on a separate sealing element. Made from durable stainless steel, the Series 1502-SS offers excellent corrosion resistance, strength, and long-lasting performance, making it perfect for high-pressure fluid power systems and industrial applications that require dependable, flexible, and durable connections.