About this item Size: AN6 to 1/8" NPT, the thread size of 6AN is 9/16-18 UNF. Material: Made of aluminum alloy 6061-T6, anodized black surface. 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. Application: Widely used in fuel systems, cooling systems, power steering systems, etc. Notice: To ensure no leakage at the NPT end, sealant or PTFE tape is strongly recommended. Easy installation and removal with wrench.