I think they are an oddball size meaning you'll have to buy the screws from the manufacturer or supplier and not a standard bolt shop.
Nothing matches the thread pitch on these carby screws on my metric and imperial thread gauge.Looks about 0.8 mm pitch
The screw part number is 692200 but I don't use Duck Duck Go if I'm looking for parts as you won't get a complex and advanced algorithm that ensures you get the most accurate results for your search phrase or more relevant results.
