With four applications this Bolt,sh-ct,6x25 is the most specified part.
The most reasonably priced component used on the Sgx50 Sky 1999 (x) Portugal / Dx Fan Cover/shroud is the Screw,tapping,4x1.
Some items from this specific schematic: Screw,tapping,4x1, Bolt,sh-ct,6x25, Fan Cover,comp, Shroud Comp..