Medeco 110A1921 Maxum Series High-Security Deadbolt, 2-3/4" Backset, 2-1/4" x 1" Faceplate, UL 437 Listed

Medeco 110A1921 Maxum Series High-Security Deadbolt — 2-3/4" Backset, 2-1/4" x 1" Faceplate, UL 437 Listed

The Medeco 110A1921 is a heavy-duty, high-security deadbolt from the Maxum Series, engineered for maximum protection against unauthorized key duplication, picking, drilling, bumping, wrenching, and physical attack. Featuring a solid 1" hardened steel bolt housed in heavy-gauge tubular steel, this deadbolt accommodates a 2-3/4" backset and a 2-1/4" x 1" faceplate, fitting doors 1-3/8" to 2-1/2" thick with a standard 2-1/8" crossbore and 1" edge bore (ANSI A115.13 prep). UL 437 Listed and BHMA A156.5 Grade 1 Certified, the Medeco Maxum delivers unmatched residential and commercial security with the Medeco 4 (M4) key control system.

Key Features

• Precise Backset & Faceplate Dimensions: Designed with a 2-3/4" backset and 2-1/4" x 1" faceplate for accurate, code-compliant installation on standard door preparations.
• Door Thickness Compatibility: Fits doors 1-3/8" to 2-1/2" thick with a standard 2-1/8" crossbore and 1" edge bore (ANSI A115.13 prep) for broad compatibility.
• Solid 1" Hardened Steel Bolt: A solid 1" hardened steel bolt in a heavy-gauge tubular steel housing provides maximum resistance to physical attack, including crowbar and kick-in attempts.
• Medeco 4 (M4) Key Control: Patent-pending key control technology protects against unauthorized key duplication, including 3D-printed copies, with special angle-cut keys requiring Medeco-specific blanks and cutting equipment.
• Drill & Pick Resistance: Hardened steel inserts, rotating pins, and strategically placed drill pins provide robust resistance to drilling and picking attacks per UL 437 standards.
• Steel Shroud & High-Security Strike Plate: Steel shroud over the bolt guards against "ice pick" attacks; included high-security strike plate features a box design with 2" screws anchoring directly to the building structure to prevent kick-in attacks.
• Master Keying Capability: M4 deadbolts can be master keyed into large systems supporting M4, M4 BiLevel, and M4 CLIQ keys and cylinders for maximum flexibility.
• Solid-Brass Construction: Solid-brass cylinder construction with strategically placed drill pins delivers maximum drill protection and long-term durability.

Certifications & Compliance

• UL 437 Listed — High Security Cylinder
• BHMA A156.5 Grade 1 Certified
• ANSI/BHMA A156.36 Grade 1 Certified Cylinders
• BHMA A156.30 Certification for Key Control
• 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
• Educational Facilities
• Healthcare Institutions
• Government and Municipal Buildings
• Multi-Tenant Residential Properties
• Retail Establishments Requiring Key Control

Why Medeco?

Medeco Maxum deadbolts are built to the most demanding security standards, combining a solid 1" hardened steel bolt, solid-brass cylinder construction, and the patented Medeco 4 key control system to resist every major form of physical and covert attack. With UL 437 Listing, BHMA A156.5 Grade 1 Certification, and BHMA A156.30 key control certification, the Maxum Series represents the pinnacle of mechanical deadbolt security for professionals who demand proven, certified performance.