實心或空心結構的圓柱體,為滾子軸承提供滾動元件。
0.7500 inches nominal rolling element diameter, plastic acetal overall material, af-de-588 assn std single material response overall material document and classification, 1 hole 0.506 to 0.508 dia,0.859 spherical radius special features, deck shelter track assy & dets end item identification