The Series 5501 45-Degree Male NPT x Male NPT Rigid adapters, made from durable carbon 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 reliable, leak-proof seal when tightened. The 45-degree angle allows for easy direction changes in piping systems, making them ideal for installations in tight spaces. Carbon steel construction ensures these adapters are suitable for high-pressure applications, offering both strength and long-lasting performance. Available in various materials, including brass and iron for low-pressure systems, these adapters are versatile and essential for maintaining secure, efficient fluid transfer connections. The nominal pipe size is determined by measuring the thread diameter and subtracting 1/4".