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Polished brass mortise lockset with ornamental knobs and double cylinders

Marks USA

Marks USA 21AC/3-W-RHR Polished Brass Right Hand Reverse Double Cylinder Mortise Door Lock

SKU CH-7P74-2SR92 MPN 21AC/3-W-RHR

A solid brass mortise lockset with double cylinder security and through-bolted Unilock trim for out-swinging doors

  • FinishPolished Brass
  • Selling UnitBox
  • TypeOrnament Unilock Knobe Mortise Entry Lockset
  • FeaturesThrough-bolted knob plate assemblies
  • Location TypeRight Hand Reverse (For Out-Swinging Door)
  • MaterialBrass
  • Right-hand reverse design suits out-swinging doors
  • Double cylinder function requires a key on both sides
  • Through-bolted solid brass construction resists forced entry
  • UNILOCK knob and plate trim enables screwless installation
  • One-inch deadbolt throw provides strong locking engagement

Polished Brass Mortise Lockset for Out-Swinging

This Marks USA 21AC/3-W-RHR lockset is built for right-hand reverse doors that swing outward. The double-cylinder design requires a key on both sides to operate the deadbolt or latch. Ornamental Unilock knob and plate assemblies are through-bolted in solid brass for strength. It suits commercial steel gates and residential security storm doors.

2-1/2 Inch Backset and 1 Inch Deadbolt Constraints

The mortise body fits doors between 1-3/8 and 1-3/4 inches thick. The front face plate measures 1 by 7-1/8 inches, so the door edge must accommodate that cutout. A 1-inch throw deadbolt engages the strike, and the cylinder spacing follows the 21AC series pattern. Hardware is supplied for the stated door range only.

Check Door Handing, Thickness

Verify the door swings outward and the hinges are on the right when viewed from the outside. Measure the door thickness to confirm it falls within the 1-3/8 to 1-3/4 inch window. Ensure the current mortise pocket matches the 2-1/2 inch backset and face plate dimensions. The lockset is keyed different with two brass cylinders and two keys included.

Highlights

  • Right-hand reverse design suits out-swinging doors
  • Double cylinder function requires a key on both sides
  • Through-bolted solid brass construction resists forced entry
  • UNILOCK knob and plate trim enables screwless installation
  • One-inch deadbolt throw provides strong locking engagement

Specifications

BrandMarks
Model21AC/3-W-RHR
FinishPolished Brass
Selling UnitBox
TypeOrnament Unilock Knobe Mortise Entry Lockset
FeaturesThrough-bolted knob plate assemblies
Location TypeRight Hand Reverse (For Out-Swinging Door)
MaterialBrass
Backset2-1/2"
KeyingKeyed Different
StyleKnobs
Series21AC
FunctionDouble Cylinder

Questions about this item

Which handing should I choose for my out-swinging door?

This model is Right Hand Reverse, designed for out-swinging doors where the hinges are on the right when viewed from the outside.

How does the double cylinder function work in daily use?

It requires a key to operate the deadbolt and lock from both the interior and exterior sides of the door.

What backset does this mortise lockset use?

It uses a 2-1/2 inch backset, which is the distance from the door edge to the centre of the knob spindle.

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