The 2pcs Black 6AN Flare to 6AN ORB Male Fuel Rail Adapter Fitting, with a thread size of 9/16-18 UNF, is ideal for various applications such as fuel rail, oil cooler, fuel pump, pressure regulator, and filter. Crafted with a body made from aluminum alloy 6061-T6 and an NBR rubber O-ring, this adapter ensures durability. The flare is designed with precision, with the AN side sealed at a 37-degree angle and the ORB side sealed using an O-ring, guaranteeing a secure fit. With an operating pressure of 1500 PSI and an operating temperature range of -65°F to 252°F, along with an O-ring temperature range of -4°F to 392°F, this adapter provides reliable performance in diverse conditions.