Yes. "4-0" is another way of writing out "0000", and 2-0 is another way of writing out "00". The more zeroes, the finer the suture. US suture sizes generally range from 11-0 ("eleven-ought", which is incredibly fine suture used for eye surgery) to 5 (heavy suture used for orthopedic procedures).

The occipital, parietal and temporal bones are connected by the squamosal suture. This suture was not present when a person is a newborn baby.

The LAMBDOID suture is the most likely suture to contain suture bones

The suture that goes in between the two parietal bones (left and right) is called the saggital suture. That is the main suture that runs in the middle of the top of your head. The parietal bones articulate with the occipital bone at the lambdoidal suture and with the temporal bones (left and right where the ears are), at the squamosal suture. Finally the parietal bones both meet with the frontal bone at the coronal suture. But the main suture between the parietals again is the saggital suture.
Lambdoidal suture connects the two parietal bones together.

Splenorrhaphy is the medical term meaning surgical suture of the spleen.