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Polished brass mortise lockset with screwless knobs and wide face plate

Marks USA

Marks USA 7NY10DW/3 Polished Brass Right Hand Mortise Lockset

SKU CH-AR6X-D3BBT

A right-hand mortise lockset with a polished brass finish, vestibule function that stays locked outside, screwless thru-bolted knobs and a 2-3/4" backset latch only

  • Lock keyingKeyed Different
  • Surface finishPolished Brass
  • Product typeMortise Lockset
  • Vestibule function keeps exterior always locked
  • Right-hand orientation matches door swing direction
  • Screwless thru-bolted knobs simplify installation
  • Solid brass cylinder includes two keys
  • Wide 1-1/4" x 8" face plate covers mortise pocket

Right-Hand Mortise Lockset

The Marks USA 7NY10DW/3 is a polished brass mortise lockset built for right-hand doors. It uses a vestibule function that keeps the outside locked at all times, making it suited for storerooms or secure offices. The latch-only design omits a deadbolt and rocker arm. Solid brass cylinder and two keys are included.

Wide Face Plate and Thru-Bolted Knobs

A 1-1/4" x 8" wide front face plate distributes mounting stress across the door edge. Screwless knob plates are thru-bolted through the lock body for a rigid connection that resists daily leverage. The scissor latch and anti-friction latch operate smoothly without a bolt mechanism. No internal thumb turn is present.

Commercial-Grade Brass Construction

Solid polished brass plates and cylinder withstand heavy traffic in commercial settings. The 2-3/4" backset fits standard door preparations. Keyed-different cylinders ensure each lockset operates on its own key. Installers need only standard mortise pocket tools; no specialised hardware is required.

How it compares

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

Price $213.99
Pricier than about 84% of the 2,145 comparable items (median $55.99).

Specifications

Product
Product typeMortise Lockset
Size & build
Surface finishPolished Brass
More details
Lock keyingKeyed Different

Questions about this item

How do I install the thru-bolted screwless knob plates on this mortise lockset and what is the common mistake?

Align the 2-3/4" backset mortise body, mount the wide 1-1/4" x 8" face plate, then thru-bolt the screwless knob assemblies through the door; the step often missed is tightening both bolts evenly so the scissor and anti-friction latches engage without binding.

What maintenance or replacement will the solid brass cylinder and scissor latch need over time?

Lubricate the scissor latch and anti-friction latch annually with dry graphite; re-key or replace the solid brass cylinder if keys wear, and inspect the thru-bolted knob plates for loosening after heavy use.

What limit appears first on this always-locked storeroom function under sustained use?

The vestibule function keeps the outside knob permanently locked, so the scissor latch and anti-friction latch endure every entry cycle; high traffic accelerates latch wear and cylinder keyway wear before any other component.

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