The most popular inquiry for Scandinavian Locks are for the cylinders which are of a more specialist nature when compared with the more commonly used Euro and Oval profile lock cylinders.
ASSA also do Euro and Oval profile lock cylinders.
Below is a schematic of a typical ASSA lock case and cylinders
As you can see from the above, the most common setup is for an internal and external cylinder which are separate items and can be purchased separately. For the internal mechanism a thumb turn is available.
Scandinavian lock cylinders come in 6 pin and 5 pin variants.
Buy Scandinavian lock cylinders online Locks & Security
You can find out more detailed information on the ASSA web site.