Riello Burner Question!!!

[possum_jenkins]

Im looking for the bypass screw for a riello 487t50 as a spare part but can seem to get a part number from tech support and the man in curzons is just looking at me funny! Do these come as a universal spare or are they specific to the burner??
One for oilman perhaps?

 

[Boilerman2]

Try a Specialist Oil Parts supplier, you have to buy a pack of Ten,
alternatively every new burner and new spare oil pump comes with a bypass screw

Try Anglian Heating Components in Wymondham in Norfolk
They are the best Oil spares stockists in the world!!!