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。
steel corrosion resisting overall material, ams5643 assn std single material response overall material document and classification, nominal length 0.050 in.; head heigth 0.062 in.; outside diameter 0.4386 in. special features, qq-p-416, type ii, class 2 fed spec single treatment response overall surface treatment document and classification, bushing, flanged, press fit part name assigned by controlling agency