Size: The thread size of 12AN is 1 1/16-12 UNF, and the thread size of AN10 ORB is 7/8-14 UNF. Sealing:The AN side of the flare is sealed by a 37 degree angle and The ORB side is sealed with an O-ring.
ORB O-ring AN10 10AN to AN10 10AN Male Adapter Fitting Black Pack of 2
2PCS ORB-8 O-ring Boss AN8 8AN to AN10 10AN Male Adapter Fitting Black Aluminum
AN10 10AN Male Flare to AN16 16AN Male ORB Straight Adapter Fitting with O-Ring
1x -8AN Black Flare to 8 ORB ORing Boss Adapter AN Fitting ORB 8 ORB.
Redhorse 9200-10-10-2 Aluminum Male ORB Hose Coupler -10AN x -10AN Black
DeatschWerks 6-02-0403 10AN ORB Male To 10AN Male Adapter (Incl O-Ring)