Size: 8AN flare to 1/4" NPT, the thread size of 8AN is 3/4-16 UNF, Degree: 90 degree elbow. Size: 8AN to 1/4 NPT. 1 x 8AN to 1/4" NPT Male 90 Degree Aluminum Fitting Adapter. Thread Size: 3/4-16 UNF. Sealing: The AN side of the flare is sealed by a 37 degree angle and the NPT thread side is sealed by a 60 degree tapered thread.