The Series 1501-SS 90-Degree Angled Male NPTF x Female NPSM swivel adapters are premium stainless steel fittings designed to provide secure, leak-free connections in hydraulic systems. Featuring a 90-degree angle, these adapters are ideal for routing hoses and pipes efficiently in tight or confined spaces. One end is equipped with a male NPTF (National Pipe Tapered Fuel) thread, which ensures a tight, leak-free seal through the deformation of the tapered threads, while the other end features a female NPSM (National Pipe Straight Mechanical) thread, designed to provide a secure connection with the help of a gasket or sealant. The key difference between NPTF and NPSM is that NPTF threads are designed for leak-tight connections without the need for sealants, while NPSM threads require a gasket or sealant to achieve a leak-free seal. The swivel feature allows for easier installation and adjustment, making these adapters ideal for high-pressure fluid transfer systems. Made from corrosion-resistant stainless steel, the Series 1501-SS offers excellent durability and long-lasting performance in demanding industrial applications.