ac performance black aluminum flare male -6an to 3/8 npt male hose fitting adapter, 6an to 3/8'' npt union fuel oil line pipe connector ac performance <p><b>male an to npt pipe adapter:</b><br> also comes in different sizes, pls contact us for more product information.</p> <p>an adapter side seals on the flare (cone) not the threads and the npt side seals on the threads precision machined to exacting tolerances for trouble-free performance.<br> made in china.<br> should not be overtorqued to prevent damage to part.<br> 37-degree sealing angle design assures leak free performance.</p>