The 4 x Close Galvanized Steel Nipple is a short, threaded pipe fitting used to connect two female-threaded fittings or pipes in a straight-line configuration. "Close" indicates that the threads nearly meet at the center, leaving minimal unthreaded space. The 4-inch length offers a compact and efficient connection for medium- to high-pressure applications. Constructed from galvanized steel, this nipple offers superior corrosion resistance, making it ideal for water, gas, air, and industrial applications.