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.
aisi assn std all material responses overall material document and classification, valve, pressure end item identification, zzzw criticality code justification, steel comp 440a or steel comp 440b or steel comp 440c overall material, cleaning, packaging, and marking iaw mil-std-1330d departure from cited document