About this itemPack of 2Size: Female AN6 to Male AN4, the thread size of 6an is 9/16-18 UNF, the thread size of 4an is 7/16-20 UNF.Size: Female AN8 to Male AN6, the thread size of 8an is 3/4-16 UNF, the thread size of 6an is 9/16-18 UNF.Size: Female AN10 to Male AN6, the thread size of 10an is 7/8-14 UNF, the thread size of 6an is 9/16-18 UNF.Size: Female AN10 to Male AN8, the thread size of 10an is 7/8-14 UNF, the thread size of 8an is 3/4-16 UNF.Size: Female AN12 to Male AN10, the thread size of 12an is 1 1/16-12 UNF, the thread size of 10an is 7/8-14 UNF.Parameter: Max working pressure: 1500PSI.Temperature range: -65°F-252°F.Material: Made of aluminum alloy 6061-T6, anodized black surface.Sealing: The AN side is sealed by a 37 degree angle.Application: Widely used in fuel system, fuel cell, fuel tank, fuel line, transmission oil cooler, etc.