用於隔開並保持軸承、滾子(經修改)的滾動元件的框架或外殼。
retainer and rollers, thrust style designator, b-1bacft;torque limiter assembly,slat end item identification, sits between nf203128-1 race,bearing and retainer,spring nf203128-1;rotates on shaft,drive nf203138-1 special features