Galvanized steel threaded fittings connect to pipe for transporting oil, water, gas, and other liquids for chemical, waste incineration, and semiconductor industry applications. These fittings are thick-walled steel dipped in a protective zinc coating to resist rust, corrosion, and mineral buildup, and withstand wet conditions. Female threads are on the inside of a fitting. Male threads are on the outside of a fitting and screw into the female threads. Threaded connections include NPT (National Pipe Thread) or BSPT (British Standard Pipe Taper), and use PTFE tape to secure seal. Threaded zinc galvanized steel pipe fittings come in a variety of sizes and shapes.