一種管狀無螺紋物件,一端帶或不帶凸緣,設計用於插入孔中以減小孔的內徑,並保護周圍的主體結構免受應力、應變和/或振動造成的損壞。總長度必須超過外徑的25%,或主體週邊平面之間的最短距離。包括分成兩段或多段的物件,且軸承週邊的旋轉角度不超過180度(3.141弧度)。有關橡膠製品,請參閱非金屬襯套。另請參閱軸承,套筒;錐形襯套;墊片,套筒;絕緣體,襯套;以及電導體襯套。不包括:襯套,鑽頭,夾具。
material controlled iaw ss800-ag-man-010/p-9290 system certification produres and criteria manual for deep submergence systems; critical item for safety and survival of deep submergence research and rescue vehicles as differentiated by special test features reference number differentiating characteristics, worm gear drive manual operator end item identification, zzzy criticality code justification