A 90° adapter in AN10 with an AN10 female swivel at one end and an AN10 male flare at the other. The swivel lets the hose end be clocked to any angle after the male thread is tightened, so a line can be turned hard against a bulkhead, sump or chassis rail without twisting the hose or fighting for clearance. In AN10 it is well suited to fuel feed and return, oil cooler lines and gearbox cooler plumbing where a straight fitting simply will not fit. Sealing is on the 37° cone rather than the thread, so bring the swivel nut up snug against a clean seat and check for weeps after first pressurisation.