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.
zzzy criticality code justification, as differentiated by special requirement in accordance with i.c. no mv-6803a,code ltrs a,b,e reference number differentiating characteristics