AC Clutch Screw

[woodworker]

AC isn't working, checked the clutch screw and it's not there. Called the parts store and they don't carry it and don't have any specs on it. Does anyone know where I can get this screw, or where to find the specs? The parts store said it's probably a special size, not standard.

[ctgottapee]

I guess when people don't say it's an 09, it's assumed that it's gen1?

The gm parts catalogs are where to search, if possible