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Polished brass mortise lockset with screwless knob, left-hand orientation

Marks USA

Marks USA New Yorker 9NY10DW/3 Polished Brass Left Hand Mortise Lockset Latch Only Screwless Knobs Thru Bolted

SKU CH-8WX6-93X3M

A left-hand mortise latch lockset with screwless through-bolted brass knobs and a solid brass cylinder

  • FinishPolished Brass
  • TypeMortise Lockset
  • KeyingKeyed Different
  • Polished brass finish resists corrosion
  • Mortise lockset suits commercial doors
  • Screwless knobs thru-bolted for strength
  • Latch-only design simplifies vestibule use
  • Solid brass cylinder includes two keys

Polished brass mortise latch for commercial

This lockset fits a standard 2-1/2 inch backset and presents a 1-1/16 by 7-5/8 inch face plate finished in polished brass. The mechanism is latch-only with no deadbolt or rocker, and the solid brass cylinder is operated by key from the outside only. Screwless knobs are through-bolted for a clean profile and added strength. Handing is factory-set to left hand.

Suits storeroom doors that must stay locked

The vestibule function keeps the exterior locked at all times while the interior remains free for egress, matching the needs of storage rooms, utility closets and secure offices. It will not serve doors that require interior thumb-turn locking or a deadbolt for extra security. Builders needing right-hand handing or a passage function should select a different model.

Left-hand handing is fixed and cannot be reversed

The lock body is assembled for left-hand doors only, so the latch bevel and knob orientation match that swing direction. Installing it on a right-hand door would leave the latch angled incorrectly and the cylinder upside down. Verify the door swing before ordering.

Highlights

  • Polished brass finish resists corrosion
  • Mortise lockset suits commercial doors
  • Screwless knobs thru-bolted for strength
  • Latch-only design simplifies vestibule use
  • Solid brass cylinder includes two keys

Specifications

FinishPolished Brass
TypeMortise Lockset
KeyingKeyed Different

Questions about this item

Will the 1-1/16" x 7-5/8" face plate cover my existing mortise pocket?

The face plate measures 1-1/16 inches wide by 7-5/8 inches tall and is solid brass, so it fits standard commercial mortise preparations of that size.

How do the screwless knobs attach through the door?

The knobs are thru-bolted; mounting screws pass through the door from the interior side into the exterior knob rose, so no exposed set screws are used.

Does the solid brass cylinder need periodic lubrication?

A light application of dry graphite powder in the keyway once a year keeps the cylinder operating smoothly without attracting dust.

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