‘Oz’ Star — Maximum Security Tattoo Parlor … INSIDE A BANK VAULT

Former “Oz” star and Hells Angel badass Chuck Zito is opening the tattoo parlor equivalent of Fort Knox — decking out a massive, real-life bank vault in New York with tattoo chairs, neon lights, everything.

The old bank in Monroe, NY was built in 1915 — and Chuck tells TMZ, he’s already invested over $100,000 converting the vault into a 21st century skin ink workshop.

It’s pretty intimidating … the vault door weighs 70 tons — 140,000 pounds — and when it’s closed, it creates an airtight seal … so Chuck had to install a special emergency ventilator.

Random fact: Monroe is the birthplace of Velveeta cheese. The more you know.