Security collar.
Municipal Code of Chicago § 14X-4-403.3.1.2
in effect14X-4-403.3.1.2 Security collar.
Every lock cylinder which projects beyond the exterior face of the door or can be accessed from outside the dwelling unit by gripping tools must be equipped with a metal ring or plate protecting the otherwise-exposed portion of the cylinder lock from wrenching, prying, pulling, or cutting by attack tools and a guard plate designed to protect the cylinder from removal or drilling.
(Amend Coun. J. 2-19-20, p. 14473, Art. V, § 13)
Source: City of Chicago, Municipal Code of Chicago (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/chicago/latest/chicago_il/0-0-0-2675597Fetched: 10/24/2026
