There doesn't appear to be a vocabulary of parts used, but in this, one of the first patents applied for (1944) they are referred to as 'grooves'.

hth

Sh** - forgot the link:

http://www.google.com/patents?id=HzFpAAAAEBAJ...

Thanks a lot!!! I hope the others get what I wanna say when I refer to them as "grooves"...

But - would "pallet grooves" be tautologic?

perhaps you could make it clear by writing:

the grooves in the pallet for the forklift-forks

?

Thanks!!!

I'm only familiar with "fork entry", bronchipret. That's not to say that the other suggestions are wrong, just that I don't have time to google them;-). More modern patents than the one odondon found certainly use "fork entry". "2" in the drawing in this patent is a "fork entry":
http://www.freepatentsonline.com/y2005/007681...

I could have sworn there was a thread on this somewhere in the archive, but I haven't hit on the right search term so far.
Edit, forget it, the thread I was thinking of was about Maß über Gabeln

I think "forklift slots" sounds the most idiomatic.