I give up!! I just need an 8 inch diameter duct wall cap cover with
NO damper built in that will accept the male mating surface of the 8
inch diameter right angle elbow going into it. Again, NO DAMPER, just
the flush exterior cover over the standard anti bird screening.
Probably flashing to mount to the sheathing material of the wall.

Not at Home Depot. Home Depot carries the 8 inch diameter ducting, the
8 inch diameter 90 deg elbow, but NOT WALL CAPS?!

Not at Lowes. Lowes carries an 8 inch cap, but found out that is a
metal termination, not a wall cap.

Searches on google keeps coming up with models that have built in
dampers; don't want that type; the damper is built into the range
hood.

The range hood with fan hangs above the cooking surface on the
exterior wall. Its 8 inch diameter duct goes straight up. Then Home
Depot's right angle turns 90 degrees to the wall and the male part [1
inch long fluting] of the elbow just reaches past the interior wall
surface [as it should]

Just need to go that remaining short distance into an 8 inch wall
cap.

There was an unconnected 7 inch diameter wall cap mounted into the
exterior wall [in the wrong place] that had its female mounting
surface flush with the interior surface. This suggests that *if* I can
find an 8 inch wall cap of similar depth , all will work out
perfectly. But, haven't found one yet!

Help.