【Details】AN6 to 1/8" NPT, the thread size of 6AN is 9/16-18 UNF. 6AN Male Flare to 1/8" NPT Pipe Fitting Adapter Aluminum Straight Blue 2PCS. 【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.