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, 0.3125 inches nominal rolling element diameter, steel comp 440a or steel comp 440b or steel comp 440c overall material, metallic hardness rating rockwell c min 58.0 in. and max 65.0 in. special features, afbma std tolerance for balls, grade 25 standard tolerance designation