Medeco 11C28 Maxum Commercial Deadbolt Lock with Blank Plate and Inside Thumbturn

Medeco 11C28 Maxum Commercial Deadbolt Lock with Blank Plate and Inside Thumbturn

The Medeco Maxum 11C28 Commercial Deadbolt Lock is a heavy-duty, high-security deadbolt engineered for demanding commercial and residential applications where maximum protection is required. Built with solid-brass construction and featuring ANSI/BHMA A156.36 Grade 1 certification and UL 437 listing, this deadbolt fits doors 1 3/8" to 2 1/2" thick and installs into a standard 2 1/8" crossbore and 1" edge bore (ANSI A115.13 prep). The captive thumbturn converts the inside cylinder to a thumbturn for easy, code-compliant egress when the facility is occupied, while the blank plate provides a clean exterior appearance for non-keyed configurations.

Key Features

• Door Thickness Compatibility: Fits doors 1 3/8" to 2 1/2" thick, accommodating a wide range of commercial and residential door constructions.
• Standard Door Prep: Designed for a standard 2 1/8" crossbore and 1" edge bore per ANSI A115.13 preparation for straightforward installation.
• Solid-Brass Construction: Heavy-duty solid-brass body provides exceptional resistance to physical attack, including prying, drilling, and forced entry attempts.
• Drill Protection: Strategically placed drill pins within the solid-brass construction offer maximum resistance against drill attacks.
• Picking and Bumping Protection: M4 cylinders utilize cylinder side pins, a shuttle lift pin, and a movable key element to engage a sidebar that prevents the key from turning until all elements are correctly rotated and aligned, protecting against bumping, picking, and other attacks.
• Key Control: Patent-pending key control protects against unauthorized duplication of keys (Medeco 4), requiring a special key cutting machine and access to Medeco-specific blanks available in a variety of restrictions.
• Protection Against 3D Printing: A patent-pending movable element in the key deters unauthorized 3D printed copies of keys or blanks.
• Master Keying Capabilities: M4 deadbolts can be master keyed into a system that includes M4, M4 BiLevel, and M4 CLIQ keys and cylinders, supporting extremely large systems.
• Captive Thumbturn Inside: Converts the inside cylinder to a thumbturn for easy exit when the facility is occupied, combining security with convenient egress.
• Wide Finish Selection: Available in 14 finishes including Bright Brass, Satin Brass, Antique Brass, Satin Brass Blackened, Bright Bronze, Satin Bronze, Oil Rubbed Bronze, Bright Nickel, Satin Nickel, Antique Nickel, Black, Dark Bronze, Bright Chrome, and Satin Chrome.

Certifications & Compliance

• ANSI/BHMA A156.36 Grade 1 Certified
• UL 437 Listed — High Security Cylinders
• BHMA Certified Grade 1 — Passes to the highest standards in the industry

Technical Specifications

• Series: Maxum® Commercial Deadbolt
• Cylinder Technology: Medeco 4 (M4)
• Pinning: 6-Pin
• Keyway: Factory-specified
• Cylinder Format: Fixed Cylinder
• Certification: UL 437 Listed; ANSI/BHMA A156.36 Grade 1 (M4)
• Door Thickness: Fits doors 1-3/8" to 2-1/2" thick
• Door Prep: Standard 2-1/8" crossbore, 1" edge bore (ANSI/BHMA A115.13)
• Construction: Solid-brass cylinder construction with hardened steel inserts
• Warranty: 2-year manufacturer's warranty

Typical Applications

• Commercial Office Buildings
• Hospitals and Healthcare Institutions
• Educational Facilities and Schools
• Restaurants and Food Service Establishments
• Retail Outlets and Storefronts
• Apartment Buildings and Multi-Tenant Residential Properties
• Government and Municipal Buildings

Why Medeco?

Medeco Maxum deadbolts deliver professional-grade security through solid-brass construction, UL 437 listed cylinders, and ANSI/BHMA A156.36 Grade 1 certification — meeting the highest standards in the industry. The M4 cylinder's patent-pending key control, anti-picking sidebar mechanism, and 3D-print-deterrent movable key element make the Maxum one of the most comprehensively attack-resistant deadbolts available for commercial and residential applications where consistent quality and ease of installation are required.