Medeco Maxum Residential Double Cylinder Deadbolt, DL Keyway, Captive Key

Medeco Maxum® M4 Residential Deadbolt – UL 437 | BHMA Grade 1 Certified

The Medeco 4 Maxum® Residential Deadbolt is one of the most secure and durable Grade 1 deadbolts on the market, offering premium protection for homes, apartments, and light commercial properties. Engineered to exceed UL 437 standards, this commercial deadbolt integrates hardened steel inserts, rotating pins, and a robust locking system to defend against picking, drilling, bumping, kicking, and other physical attacks.

Whether you're looking for a Medeco deadbolt, a high-security Medeco M4 deadbolt, or a specialized Medeco double cylinder deadbolt, the Maxum line delivers unmatched performance.

Key Benefits of the Medeco M4 Locking System

• Medeco 4 (M4) Technology: Patent-pending key control and a movable element in the key prevent unauthorized key duplication—including 3D printed copies.

• Angled Key Cuts: Increase the number of available key combinations for enhanced master keying capabilities.

• Master Keying: Supports integration with M4, M4 BiLevel*, and M4 CLIQ* systems for large-scale keying architectures.

• Solid Brass & Steel Construction: With a hardened 1” steel bolt and heavy-gauge tubular steel housing, the Maxum defends against crowbar, ice-pick, and wrench attacks.

Configurations

• Single Cylinder

• Medeco Double Cylinder Deadbolt

• Medeco Captive Key Deadbolt: Allows for thumbturn operation when occupied and converts to a secure double-cylinder when not in use.

Certifications & Standards

• ANSI/BHMA A156.36 Grade 1

• UL 437 Listed for drill and pick resistance

• BHMA A156.30 Certified for patented key control and duplication protection

Security Enhancements

• Steel shroud protects bolt from ice pick-style attacks

• High-security strike plate with 2” screws anchors to structural framing to resist kick-ins

• Reinforced bolt housing withstands heavy prying attempts

Specifications

• Fits doors: 1-3/8” to 2-1/2” thick

• Bore prep: 2-1/8” crossbore, 1” edge bore (ANSI A115.13)

• Model example: Medeco Maxum 11TR503 19 – Satin Nickel Finish

Applications

Perfect for:

• Residential homes

• Condominiums

• Apartments

• Home offices

• Light-duty commercial entrances

Available Finishes

• 05 – Bright Brass

• 06 – Satin Brass

• 09 – Antique Brass

• 10 – Satin Brass Blackened

• 11 – Bright Bronze

• 12 – Satin Bronze

• 13 – Oil Rubbed Bronze

• 18 – Bright Nickel

• 19 – Satin Nickel

• 20 – Antique Nickel

• 22 – Black

• 24 – Dark Bronze

• 25 – Bright Chrome

• 26 – Satin Chrome