1/4 Inch NPT X 1/4 Inch NPT Male Thread Solid Brass Hex Nipples, Pipe Fitting an
These fittings are made of brass, Threads used on these nipples are NPT. A Hex Nipple is a fitting, usually provided with a pipe thread at each end, for connecting two other fittings. Tanya Hardware Brass Hex Nipple Coupling Set.