Thumbturn Privacy Door Bolt in Satin Nickel - Door Lock Replacement Parts - Amazon.com
MOSECYOU Deadbolt Lockout Device, to Block The Deadbolt Thumb Turn, Lockable Child Proof Safety Dead Bolt Cover Lock, Apartment Extra Temporary Lock, Outswing Door Security Lock, Protection Guard - Amazon.com
32mm Oval Security Bolt Thumb Turn – Denleigh
Thumb Turn Security Bolt & Release in Polished Chrome | DHS