A homogenous spherical body, a series of which provides the rolling elements in a bearing, ball (as modified). The item is designed primarily to alleviate friction. It may have other usages such as the checking component in a ball-type check valve. Excludes:ball,check; ball,valve,ported.
horizontal stabilizer; lockheed drawing 354330: t.m. c-12-130-0a0/my-001, fig 2-6-2, index -79 end item identification