Often referred to loosely as the mandrel, which see, a complete mandrel assembly consists of: [1] a mandrel body, [2] a mandrel nose insert, [3] a mandrel link or insert link, [4] a mandrel screw, and, if necessary, [5] a ball sub-assembly. A non-inserted mandrel assembly, sometimes called an “aircraft type” or “aircraft quality” mandrel assembly, does not include the second component, the nose insert.