管狀物件,帶或不帶凸緣,旨在減少摩擦,並在平行於孔軸線的表面上承載動載荷。必須具有可見或可檢測的潤滑裝置,或可自潤滑。總長度必須超過外徑的25%或本體週邊平面之間的最短距離,但直管狀(無凸緣或肩部)物體除外,其承載面僅平行於孔軸線。包括分成兩段或多段,且承載圓週角不超過180度(3.141弧度)的物件。另請參閱襯套、套筒;墊片、套筒;以及墊圈(經修改)。不含:銷、空心。
square all corners corner shape, 0.3755 inches minimum and 0.3765 inches maximum body inside diameter, 0.5007 inches minimum and 0.5017 inches maximum body outside diameter, qq-a-200/3,t8511 fed spec single material response or qq-a-225/6,t851 fed spec single material response outer layer material document and classification, 0.3025 inches minimum and 0.3125 inches maximum overall length