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Polished brass mortise lockset with screwless knob, left-hand, 10 16

Marks USA

Marks USA New Yorker 9NY10D/3 Polished Brass Left Hand Mortise Lockset

SKU CH-WPK7-EFRH2

Polished brass mortise lockset with classroom function, latch and rocker only, screwless through-bolted knobs and solid brass cylinder with two keys

  • FinishPolished Brass
  • TypeMortise Lockset
  • KeyingKeyed Different
  • Polished brass finish resists corrosion and matches traditional décor
  • Mortise lockset design installs within the door for a flush, secure fit
  • Classroom function keeps the outside locked while allowing free exit from inside
  • Screwless knobs with thru-bolted plates simplify installation and prevent loosening over time
  • Solid brass cylinder with two keys provides durable keyed-different access control

Polished Brass Mortise Lockset

The Marks USA New Yorker 9NY10D/3 is a commercial-grade mortise lockset finished in polished brass. It is designed for left-hand doors in office vestibule or classroom settings where a latch and rocker function is required without a deadbolt. The lockset includes a solid brass cylinder and two keys, keyed different for individual access control.

Through-Bolted Installation with Screwless Knobs

This lockset uses through-bolted plate assemblies that mount securely through the door thickness, eliminating exposed screws on the knob roses. The screwless knobs operate on a self-adjusting spindle that accommodates standard door preparations. Solid brass front and strike plates provide durability and a consistent finish, while the 1-1/16" by 7-5/8" face plate fits standard mortise pockets.

Classroom Function for Sustained Access Control

The classroom function keeps the outside knob locked at all times, requiring a key for entry, while the inside knob always allows free egress. This behaviour remains consistent under continuous daily traffic because the latch and rocker mechanism operates without a bolt to throw or retract. The solid brass cylinder resists wear from repeated key cycles, maintaining reliable operation over extended periods.

Highlights

  • Polished brass finish resists corrosion and matches traditional décor
  • Mortise lockset design installs within the door for a flush, secure fit
  • Classroom function keeps the outside locked while allowing free exit from inside
  • Screwless knobs with thru-bolted plates simplify installation and prevent loosening over time
  • Solid brass cylinder with two keys provides durable keyed-different access control

Specifications

FinishPolished Brass
TypeMortise Lockset
KeyingKeyed Different

Questions about this item

What is the backset measurement for this mortise lockset?

The lockset has a 2-1/2" backset for standard door preparation.

Does the lock generate noticeable heat or noise during continuous daily operation?

Mechanical mortise locksets operate silently and produce no measurable heat during normal use.

What door thickness and preparation are required for the thru-bolted installation?

The thru-bolted plate assemblies mount through the door with screwless knobs and a self-adjusting spindle.

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