DS EN 4424:2006 Aerospace Series - Rod-Ends, Adjustable, Single Fork And Threaded Shank With Engagement: 1,5 X Thread Diameter In Titanium Alloys - Dimensions And Loads Defines the characteristics of rod-ends for flight control rods, a single fork, a threaded shank comprising, a circumferential groove to identify engagement, an optional longitudinal groove for lockin