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。
0.3730 inches minimum and 0.3735 inches maximum body outside diameter, square all corners corner shape, 1.2450 inches minimum and 1.2500 inches maximum overall length, mil-t-6736 mil spec 1st material response or ams6371 assn std 2nd material response or mil-t-6735 mil spec 2nd material response overall material document and classification, 0.2495 inches minimum and 0.2505 inches maximum body inside diameter