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Polished brass mortise lockset with screwless knobs and cylinder

Marks USA

Marks USA New Yorker 9NY10A/3 Polished Brass Left Hand Mortise Entry Lock Set

SKU CH-RVFP-A2M13

A left-hand mortise entry lockset with screwless, thru-bolted knobs and a solid brass cylinder supplied with two keys

  • FinishPolished Brass
  • TypeMortise Lockset
  • KeyingKeyed Different
  • Solid brass plates resist corrosion and wear
  • Screwless knobs thru-bolted for tamper-resistant mounting
  • Left-hand mortise fits standard door preparations
  • Solid brass cylinder includes two keys
  • Keyed different for individual access control

Marks USA Mortise Entry Lock Set

The Marks USA New Yorker 9NY10A/3 is a left-hand mortise entry lock set finished in polished brass. It uses a 2-1/2 inch backset and a one-inch deadbolt throw. Solid brass plates and a thru-bolted, screwless knob design provide a clean appearance and secure mounting for commercial or heavy residential doors.

Suited for left-hand doors needing a mortise lock

This lock suits installers fitting a left-hand door with a standard mortise pocket who want a polished brass finish and a screwless knob appearance. It is not for right-hand doors, nor for cylindrical or tubular latch preparations, and it does not suit projects that require a lever handle or an electronic access module.

Solid brass cylinder and thru-bolted construction

The solid brass cylinder operates with two included keys on the exterior and a thumb turn on the interior. Thru-bolting distributes load across the door thickness, reducing loosening under repeated daily cycling. The one-inch deadbolt and heavy front face plate maintain alignment during sustained commercial traffic.

Highlights

  • Solid brass plates resist corrosion and wear
  • Screwless knobs thru-bolted for tamper-resistant mounting
  • Left-hand mortise fits standard door preparations
  • Solid brass cylinder includes two keys
  • Keyed different for individual access control

Specifications

FinishPolished Brass
TypeMortise Lockset
KeyingKeyed Different

Questions about this item

What door thickness does the 1-1/16" x 7-5/8" front face plate suit?

The mortise lock body fits standard door preparations; the front plate dimensions match common commercial mortise cut-outs.

Will the left-hand mortise chassis work with existing right-hand door hardware?

No, the lockset is handed for left-hand doors only; the latch bolt and deadbolt orientation cannot be reversed.

How do I confirm the thru-bolted screwless knobs are properly engaged after installation?

Turn each knob — both should rotate the latch smoothly without wobble, and the deadbolt should throw and retract cleanly with the key and thumb turn.

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