Dixon 5404-12 Zinc Plated Steel Hydraulic Pipe Fitting, Hex Nipple, 3/4"-14 NPT Male Nipple for connecting two pipes or extending pipe length Male National Pipe Taper Fuel (NPTF) threads for connecting two female pipes Zinc-plated steel for strength and corrosion resistance For use in medium to high-pressure water, oil, and hydraulic fluid applications