Medeco 110A1911 Maxum High-Security Deadbolt with 2-3/8" Backset and UL 437 Listed Cylinder

Medeco 110A1911 Maxum High-Security Deadbolt — UL 437 Listed, BHMA A156.5 Grade 1 Certified

The Medeco Maxum 110A1911 is a heavy-duty, high-security deadbolt engineered to deliver unmatched protection against unauthorized key duplication, bumping, picking, drilling, wrenching, kicking, and other forms of physical attack. Featuring a solid 1" hardened steel bolt housed in a heavy-gauge tubular steel body, this deadbolt is UL 437 Listed and BHMA A156.5 Grade 1 Certified. It accommodates doors 1-3/8" to 2-1/2" thick, uses a standard 2-3/8" backset with a 2-1/4" x 1" faceplate, and is built around the Medeco 4 (M4) cylinder platform for maximum key control and master keying flexibility.

Key Features

• Solid 1" Hardened Steel Bolt: A full 1" hardened steel bolt in a heavy-gauge tubular steel housing provides maximum resistance to physical attack, including crowbar and kick-in attempts.
• Door Thickness Compatibility: Fits doors 1-3/8" to 2-1/2" thick with a standard 2-3/8" backset, 2-1/4" x 1" faceplate, and standard 2-1/8" crossbore and 1" edge bore (ANSI A115.13 prep).
• Medeco 4 (M4) Key Control: Patent-pending Medeco 4 design provides protection against unauthorized key duplication, including deterrence against 3D-printed key copies or blanks, via a patent-pending movable element in the key.
• Drill and Pick Resistance: Hardened steel inserts and rotating pins provide drill and pick resistance per UL 437 standard; solid-brass construction with strategically placed drill pins adds further protection.
• Steel Shroud Over Bolt: A steel shroud over the bolt protects against "ice pick" type attacks for added physical security.
• High-Security Strike Plate: Includes a special box-design strike plate secured with 2" screws that anchor directly to the building structure behind the frame, preventing kick-in attacks.
• Master Keying Capabilities: M4 deadbolts can be master keyed into systems that include M4, M4 BiLevel, and M4 CLIQ keys and cylinders, supporting extremely large master key systems.
• Special Angle-Cut Keys: Requires a special key cutting machine and Medeco-specific blanks; angled cuts along with fore-and-aft positioning dramatically increase key combinations for large master key systems.

Certifications & Compliance

• UL 437 Listed — Protection against picking and drilling attacks
• BHMA A156.5 Grade 1 Certified Deadbolt
• BHMA A156.30 Certified Locking Technology — Key control and unauthorized duplication protection
• ANSI/BHMA A156.36 Grade 1 Listed Cylinders for high security
• ANSI A115.13 Door Preparation Compatible

Technical Specifications

• Series: Maxum® Residential Deadbolt
• Cylinder Technology: Medeco 4 (M4)
• Pinning: 5 or 6-Pin
• Keyway: Factory-specified
• Certification: UL 437 Listed; ANSI/BHMA A156.36 Grade 1 (M4)
• Bolt: 1" solid hardened-steel bolt in heavy-gauge steel housing
• 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

• Residential Entry Doors Requiring High-Security Protection
• Commercial Office Buildings and Suites
• Educational Facilities and Campus Buildings
• Healthcare Institutions and Medical Offices
• Government and Municipal Buildings
• Multi-Tenant Residential Properties
• Retail Establishments and Small Businesses

Why Medeco?

Medeco Maxum deadbolts are built to the highest security standards, combining a solid 1" hardened steel bolt, heavy-gauge tubular steel housing, and the advanced Medeco 4 (M4) cylinder platform to resist drilling, picking, bumping, and physical attack. With UL 437 Listing, BHMA A156.5 Grade 1 Certification, and BHMA A156.30 key control certification, the Maxum delivers professional-grade security for residential and commercial applications where protecting access is paramount.