一種相對扁平的剛性部件,帶或不帶中心孔,用於將環形軸承或套筒軸承固定在合適的外殼中。必須附有用於安裝的鑽孔和/或螺紋孔。不含:端蓋、電動旋轉設備。
mil-s-890,class c mil spec 1st material response or aisi assn std 2nd material response overall material document and classification, steel or steel comp 1018 overall material