Thread Escutcheon 5/8"
Thread escutcheons are probably the most universally useful keyhole choice. Nothing looks more elegant on period or contemporary design than a properly installed and finished thread escutcheon. The neatest installation will leave the escutcheon a hair proud of the wood to then be filed flush, to achieve this requires accurate cutting, this explains the popularity of surface mounted types which can simply be nailed over crudely cut keyholes.
3/4" x 3/8"