Russell AN to NPT adapter fittings are the third and final step to completing your hose assembly. The AN side of the fittings uses a 37 degree sealing angle that guarantees a positive seal at maximum operating pressures. These fittings are available in straight, 45 degree, and 90 degree styles. They come in your choice of blue anodized aluminum, "Endura" nickel plated aluminum, or stainless steel.