45-Degree Angled Female NPT adapters are designed to provide secure, leak-free connections in fluid and gas transfer systems. NPT (National Pipe Tapered) threads, a U.S. standard used for over 100 years, feature tapered threads that create a tight seal when the male and female parts are threaded together, effectively preventing leaks. The nominal pipe size can be identified by measuring the thread diameter and subtracting 1/4". These adapters are available in various materials, including iron and brass for low-pressure applications, and carbon steel and stainless steel for high-pressure systems. Their 45-degree angle allows for flexible installation, making them ideal for applications requiring durable, high-performance sealing solutions. Do not over-tighten. We recommend using a thread sealant with this type of connection style.