The most reasonably priced component used on the Sgx50 Sky 1999 (x) Spain / 50t Mesh Inner Rack Sg is the Washer,plain, 6mm.
The four Sgx50 Sky 1999 (x) Spain / 50t Mesh Inner Rack Sg component parts are all listed in this schematic.
With four applications this Screw,spec.5x12 is the most specified part.