The Series 5501-SS 45-Degree Male NPT x Male NPT Rigid adapters, made from high-quality stainless steel, are designed for fluid and gas transfer systems that require secure, angled connections. These adapters feature male NPT (National Pipe Tapered) threads, a U.S. standard for tapered threads that provide a strong, leak-free seal when tightened. The 45-degree angle allows for easy directional changes in piping, making them ideal for installations in tight or confined spaces. Stainless steel construction ensures these adapters are perfect for high-pressure applications, offering durability and resistance to corrosion. Available in different materials, including brass and iron for low-pressure systems, these adapters ensure reliable performance and secure connections. The nominal pipe size is determined by measuring the thread diameter and subtracting 1/4".