Adjustable planing stop

Workbench planing stop that can be raised & lowered using the threaded rod.

I used a 3/8" threaded rod to match the threaded insert, since that was what I had on hand.  On the end of that I tapped a M8 threaded section to fit the hex bolt head and drilled a small hole for the cotter pin.

Flush with workbench
Raising/lowering
Partially raised
Recess showing 3/8" threaded insert (scavenged from a bed frame)
Washer pinned in place on the underside