6-32X3/8-PHP
-
54746439-6-32X3/8-PHP
SCREW, 6-32X3/8, PHILLIPS PAN H
given in nominal sizes, not in the actual measurement.
A special design is cut into the head of the screw that the screwdriver will fit into when the screw is driven into a surface. This is called a drive. There are many different designs of drives.