Brass Hex Nipple, 1/2″ x 1/2″ NPT Male Adapter Pipe Fitting, 8 PieceCondition:* New Surplus Stock, No OEM Packaging. As Pictured.Additional Notes:* This fitting is hex head design for easy removing by wrench and other tools.* Easy to connect pipelines.* High strength, high hardness premium solid brass with thick wall, more durable than iron and iron galvanized pipe fittings.* Precisely milled, threads are tighter and deeper, not easy to slip; smooth threads will reduce the resistance during installation, saving time and improving efficiency.UNKRP21964