Vibrant Inverted Flare to AN Adapter -6AN Inverted Flare 5/8in-18Vibrant Performance Male AN Flare to Inverted Flare Adapters are manufactured from 6061 Aluminum Alloy. These fittings are commonly used in a variety of fuel system applications, making it easier to adapt AN hoses to your system. Available in Anodized Black only. Inverted Seat Adapter Fitting; 6AN; 5 8 18 in. Inverted Flare; Zinc Plated Steel; Flare To An;