Rhino combi oil boiler
Guys,
Needing some help - I was in the process of resetting my Rhino Oil Combi Boiler as it wasn't working and I bled the oil out a bit by using an allen key to loosen a bolt which lets the oil get through.
Unfortunately, I've loosened this too much and the bolt has fallen off and rolled underneath the boiler which I can't lift or get to.
The screw is about 10mm - 12mm in width but I'm sure it decreases in width and is controlled by an allen key.
Does anyone know what this screw / bolt is called ?
I've tried B&Q and tried about 10 different bolts and also screwfix but can't get any luck.
Most of the bolts that fit seem to catch on with the top turn but it doesn't stop the oil coming through due to the screw having different dimensions in width.
Any advice or help would be greatly appreciated as I can't start the boiler without this bolt being in as it just pi$$es oil.
Regards,
James