通常為圓柱形,有或沒有法蘭。其設計用於安裝後鑽孔,並用作軸承或襯套。不包括:散裝物品。另請參閱襯套毛坯。
square all corners corner shape, 0.3580 inches minimum overall length, 1.5832 inches minimum and 1.5842 inches maximum body outside diameter, door assy end item identification, 1.3780 inches minimum and 1.3790 inches maximum body inside diameter