To provide a method of manufacturing a pivot assembly, the method that sufficiently produces an oxygen-free condition and does not generate an uncured part even if an anaerobic adhesive is used.

Curing is remarkably promoted by substituting nitrogen gas for an atmosphere in a container 100 and disposing a metal material 20 made of powder of pure iron in the container 100. Extremely superior curing of the anaerobic adhesive can be obtained, and superior chemical resistance is exhibited. Even at a further low treatment temperature, sufficient curing is obtained.