All the cam locks on my classic 4 are 2600 series. If you want those, you need to look at a different chart for the thickness.
This chart for winged http://www.aircraftspruce.com/catalo...oc2600wing.php
If you want philips use this one http://www.aircraftspruce.com/catalo...camloc2600.php
Just for comparrison. On my classic 4, the camlocks that go through one layer of fiberglass cowel and a metal fuselage tab are 2600-3 studs.
Those attaching two layers of fiberglass cowel together are 2600-4 studs.
All the receptacles are part number 212-12N (plain rivet holes)
All the retaining washers (one for each camlock) are part number 2600-LW.