實心或空心結構的圓柱體,為滾子軸承提供滾動元件。
needle roller, spherical ends style designator, 0.0310 inches minimum and 0.0312 inches maximum rolling element diameter, acft eng f-101 end item identification, steel comp 440c overall material, 0.1420 inches minimum and 0.1620 inches maximum overall length