The drawing on the left describes a carbon graphite face that is called a monolithic design by some seal manufacturers. They use this terminology to differentiate the solid carbon/ graphite face from an inserted carbon-graphite face that is installed into a metal holder and often called a composite.

The composite is shown in the drawing on the right hand side.

If you are going to use a composite, the carbon/graphite should be pushed into the metal holder allowing the carbon to shear and fit the machined part rather than “shrunk” in by heating the holder and dropping in the carbon/graphite face, causing distortion and “out of flatness.”