What does female pipe thread look like?

Female pipe thread features an internal tapered or straight thread design that allows it to connect with male pipe threads. The internal threads are typically cut into the inside of a fitting or pipe, creating a snug fit when mated with a male counterpart. The most common types are NPT (National Pipe Tapered) and NPS (National Pipe Straight) threads, distinguished by their taper and shape. Female threads often appear as a smooth opening with visible grooves from the threading inside.