Product Details: The Aeroquip NPTF Brass Pipe Adapter Close Nipple is the perfect solution for your air brake applications. It provides superior corrosion resistance with Dura-Kote platting, ensuring a strong and reliable seal that is leak-proof. It is approved for most air brake applications with the exception of the frame to axle installation and between towed and towing vehicles. FleetPride is your First Click in Heavy Duty®.