10AN Flare to AN8 ORB Male O-Ring Fitting Adapter Black 2Pcs. 【Size】The thread size of 10AN is 7/8-14 UNF, and the thread size of AN8 ORB is 3/4-16 UNF. 【Seal】 The AN side of the flare is sealed by a 37 degree angle and The ORB side is sealed with an O-ring.