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Rectangular mortise deadlock body in satin chrome finish with strike plate included

Marks USA

Marks USA 3/26D Series 3 Mortise Armored Deadlock Body Satin Chrome US26D 2-3/4" BackSet

SKU CH-4ZSC-89MYS

Mortise armored deadlock body with 1" bolt throw and included #4035 strike

  • Lock keyingKeyed Different
  • Product typeMortise Lockset
  • Mortise armored deadlock body with 1" bolt throw
  • Satin Chrome US26D finish for corrosion resistance
  • Stamped steel case adds structural strength
  • Includes #4035 strike plate for complete installation

Series 3 Mortise Armored Deadlock Body

This Marks USA Series 3 mortise armored deadlock body provides a heavy-duty locking solution for commercial and residential doors. The lock features a 1" bolt throw and a 2-3/4" backset for standard door preparation. A satin chrome US26D finish protects the brass construction. The package includes the lock body and a #4035 strike plate.

Keyed Different for individual access control

Each unit is supplied keyed different so every door operates on its own unique key. This configuration suits projects where separate access is required rather than a master-keyed or alike system. Buyers needing multiple locks on a single key or a master-key hierarchy should select a differently keyed option. The stamped steel case and included strike complete the installation hardware.

How it compares

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

Price $71.99
Pricier than about 56% of the 2,145 comparable items (median $55.99).

Specifications

Product
Product typeMortise Lockset
More details
Lock keyingKeyed Different

Questions about this item

What mortise pocket depth does the 1-1/16" by 4-5/8" front plate require?

The lock body fits a standard mortise pocket cut to accept a 1-1/16" wide by 4-5/8" tall front plate; the 1" bolt throw needs matching strike clearance.

Which step is most often missed when fitting the supplied #4035 strike?

Installers often forget to mortise the frame for the #4035 strike so it sits flush; the deadlock's 1" bolt will not engage fully if the strike protrudes.

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