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Bright brass double cylinder deadbolt with two keyed cylinders and a rectangular faceplate

Medeco

Medeco 11-R523-605-00 Bright Brass Double Cylinder Deadbolt 2-3/8" Backset 1" Faceplate Grade 1

SKU CH-220E-QKKJY MPN 11-R523-605-00

Grade 1 double-cylinder deadbolt with anti-drill and anti-pry protection for doors 1-3/8" to 2-1/2" thick

  • Surface finishBright Brass
  • Sold asBox
  • Grade 1 certification meets highest residential security standards
  • Double cylinder design requires key on both sides for controlled access
  • Bright brass finish resists corrosion while complementing traditional hardware
  • Fits doors 1-3/8" to 2-1/2" thick for versatile installation
  • ANSI/BHMA A156.30 and UL437 listed cylinders provide verified high-security protection

Product Identity

The Medeco Maxum 11-R523-605-00 is a Grade 1 double cylinder tubular deadbolt finished in bright brass. It uses a 5 pin tumbler with the Original 00 keyway and meets ANSI/BHMA A156.30 and UL 437 listings for high security. The lock suits commercial and heavy duty residential doors.

Upgrade Context

This deadbolt replaces lower grade single cylinder or unlisted hardware where key control and physical attack resistance are required. The jump is worth it when a building needs keyed entry on both sides and certified resistance to drilling, prying and picking. It is not for doors that cannot accommodate a double cylinder egress requirement or where a thumbturn interior is preferred.

Installation Check

Verify the door thickness falls between 1-3/8" and 2-1/2". Confirm the existing crossbore measures 2-1/8" and the edge bore is 1". Ensure the backset matches 2-3/8" and the faceplate width is 1". The double cylinder function requires a key for interior operation, so check local fire codes before fitting.

How it compares

Measured against everything we stock in Door Lock Sets & Deadbolts, at today’s prices. Recalculated every night.

Price $403.99
Pricier than about 91% of the 2,145 comparable items (median $55.99).

Specifications

Product
Brand nameMedeco
Model name11-R523-605-00
Size & build
Surface finishBright Brass

Questions about this item

What door thickness and crossbore size does this 2-3/8" backset deadbolt require?

It fits doors 1-3/8" to 2-1/2" thick and requires a 2-1/8" crossbore with a 1" edge bore for the latch.

How is the double cylinder installed, and what alignment step is often missed?

Insert the outside cylinder, then the inside cylinder through the 2-1/8" crossbore; secure both with the mounting screws, ensuring the tailpieces engage the bolt mechanism simultaneously.

Which parts of this Grade 1 deadbolt typically need replacement over time?

The 5-pin tumbler cylinders may need rekeying if keys are lost; the solid brass bolt and strike plate rarely wear but can be replaced if damaged.

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