thirty-three components are shown in this Nh80ms Lead 1994 (r) France Crankcase/oil Pump exploded diagram.
A sample from the products for the Crankcase/oil Pump include: Tube,oil Pass, Oil Seal,20x31x7, Bolt,flange,6x45, B/brg Rad N/com.
On this parts fiche the Bolt,flange,6x28 is the most specified component.