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.
as differentiated by material which must conform to ships parts control center special quality control provisions and certified free from mercury contamination reference number differentiating characteristics, zzzy criticality code justification, 66 fed std single material response overall material document and classification, afbma stamdard tolerance for balls,grade 48 special features, steel comp 440c overall material