Parts such as the E-1: Bolt,flange,6x22, Shroud Comp., Cover Comp,fan, Cover Comp,fan are included in the Nh90m 1988 (j) Japan Hf05-100 / Type 2 E-1 parts fiche.
In this schematic the "Bolt,flange,6x22" is used most often.
The E-1 assembly is constructed from several parts from which the Shroud Comp is the most expensive.