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Satin nickel single cylinder deadbolt with rectangular faceplate and thumb turn

Medeco

Medeco 11-R503-619-00 Satin Nickel Grade 1 Single Cylinder Deadbolt 2-3/8" Backset 1" Faceplate door lock

SKU CH-THQX-S5WSR MPN 11-R503-619-00

Grade 1 single-cylinder deadbolt with 5-pin tumbler, anti-drill and anti-pry protection for doors 1-3/8" to 2-1/2" thick

  • Surface finishSatin Nickel
  • Sold asBox
  • Grade 1 certification delivers commercial-grade security
  • Satin Nickel finish resists wear and matches modern hardware
  • 5-pin tumbler with Original 00 keyway prevents picking and unauthorised key copies
  • Solid brass construction with anti-drill and anti-pry features withstands forced entry
  • Adjustable 2-3/8" backset fits doors 1-3/8" to 2-1/2" thick

Grade 1 Single Cylinder Deadbolt

The Medeco Maxum 11-R503-619-00 is a Grade 1 single cylinder tubular deadbolt with a satin nickel finish. It features a 5 pin tumbler cylinder using the Original 00 keyway. The lock is ANSI/BHMA A156.30 and UL 437 listed for high security. It suits commercial and heavy duty residential doors.

Ideal for High Security Doors

This deadbolt fits doors 1-3/8" to 2-1/2" thick with a 2-1/8" crossbore and 1" edge bore. It provides anti-drilling and anti-prying protection with solid brass construction. It is not suited for doors outside that thickness range or for double cylinder requirements. Buyers needing electronic access or smart home integration should look elsewhere.

2-3/8" Backset Compatibility

The lock has a fixed 2-3/8" backset and a 1" faceplate width. Verify your door prep matches these exact dimensions before purchase. An incorrect backset prevents the latch from aligning with the strike plate. This single specification determines if the deadbolt will install correctly.

How it compares

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

Price $368.99
Pricier than about 90% of the 2,145 comparable items (median $55.99).

Specifications

Product
Brand nameMedeco
Model name11-R503-619-00
Size & build
Surface finishSatin Nickel

Questions about this item

How is the 1" faceplate mounted and what alignment step is often missed?

Mortise the 1" faceplate into the door edge so it sits flush, then secure with the two supplied screws; the step often missed is checking that the 2-1/8" crossbore and 1" edge bore are perfectly centred before tightening.

Which parts will need lubrication or replacement over time?

The 5 pin tumbler cylinder and the bolt assembly benefit from periodic dry lubricant; keys cut on the Original 00 keyway may wear and require recutting, while the solid-brass bolt and strike rarely need replacement.

What is the first limitation under sustained heavy use?

The ANSI/BHMA Grade 1 cycle rating defines the endurance limit; beyond that the 5 pin tumbler mechanism can develop binding before the solid-brass housing shows wear.

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