TexLaw said in Grinder plates for #22 Walton grinder:

Jonathon Don’t you expect to have product come out of the gap where the tab is? If so, you’ll have an inconsistent grind.

While there may be a gap at that point on the edge of the plate, the seal between the plate face and the threaded retaining nut is usually a smooth machined surface and makes a pretty good seal. I would be surprised to see meat leak past this area .