ISO 3031:2021

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.