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.
5/16 inch bore special features, crane assy,ovhd brdg,crane,ovhd weapons 191880 end item identification