本文件规定了止推滚针和保持架组件的外形尺寸和公差。此外，它还建议了推力垫圈的尺寸和公差，即滚道构件，可以用作轴或壳体垫圈。 附录A给出了止推滚针和保持架组件及止推垫圈应用的一般特征。 附录B中给出了止推滚针和保持架组件以及止推垫圈的测量方法。

This document specifies the boundary dimensions and tolerances for thrust needle roller and cage assemblies. Furthermore, it recommends dimensions and tolerances for thrust washers, i.e. raceway members, which can be used either as shaft or housing washers. Annex？A gives general characteristics for application of thrust needle roller and cage assemblies and thrust washers. Gauging method for thrust needle roller and cage assemblies and thrust washers is given in Annex？B.