Corbin Russwin 433F LH Left-Hand Mortise Lock Body with Faceplate & Strike, UL-Listed Single Point Lock or Latch 233N Case, Commercial Grade for Wood/Metal Doors (Lockbody Only—No Cylinder or Levers)

Corbin Russwin 433F LH Left-Hand Mortise Lock Body with Faceplate & Strike, UL-Listed Single Point Lock or Latch 233N Case, Commercial Grade for Wood/Metal Doors (Lockbody Only—No Cylinder or Levers)

Condition: Used; cosmetic marks and handling wear consistent with service. Includes mortise lock case (433F LH), matching faceplate, and strike plate only. No cylinder/keys, no levers/rose/escutcheon, no screws beyond what’s shown.

The term “left side” when referring to Corbin Russwin mortise locks typically indicates the orientation of the lock when viewed from the outside of the door. A left side mortise lock means that the lock mechanism is located on the left side of the door when viewed from outside. This is important to know because the lock orientation needs to be specified when ordering, to ensure that the lock will be installed in the correct position.

This is a genuine Corbin Russwin 433F left-hand (LH) mortise lock case assembly with faceplate and strike. It’s the heavy, thru-bolted grade of hardware you see on commercial/industrial doors. A mortise lock body installs inside a rectangular pocket cut in the door; trim (levers/escutcheons) and a cylinder drive the square hub and latch inside this case. The edge label shows the common handing chart (425F–433F, RH/LH/RHRB/LHRB) and this unit is set LH. Another label notes UL Listed – Single Point Lock or Latch 233N.

What you’re getting: lock case, stainless/US32 faceplate, and strike plate—exactly as pictured. You will need compatible trim (levers/knobs/escutcheons), mortise cylinder, and mounting screws to complete an opening.

Features

• Corbin Russwin 433F LH mortise lock case (factory handed Left-Hand).

• UL listed marking: Single Point Lock or Latch 233N (as labeled on case).

• Commercial duty construction with steel case and adjustable components.

• Faceplate & strike plate included (see photos for profile).

• Square spindle hub for lever/knob trim; separate cylinder bore for a standard mortise cylinder.

• Serviceable: removable cover for inspection/cleaning; side label with handing reference.

Typical Specifications (for 43xF family — verify on your opening)

• Backset: commonly 2-3/4 in. on many Corbin Russwin mortise cases (measure your unit/door prep).

• Door thickness: typically 1-3/4 in. and up (depends on trim).

• Faceplate: mortise style edge plate (length/width per photos).

• Strike: mortise strike with dust-box prep (ANSI style).

• Handing: LH (left-hand; hinges on left when viewed from pull side, door swings in).

Applications / Spheres of Use

• Commercial buildings: offices, schools, healthcare, hospitality, multi-family corridors.

• Interior or exterior openings using mortise locks for higher durability and security.

• Retrofit/repair: direct replacement where a Corbin Russwin 43xF case is already mortised into the door.

Plain-language “how it’s used”

The lock body sits inside a pocket in the door. Your lever set turns the square hub to retract the latch; a mortise cylinder in the face locks/unlocks the internal mechanism. The faceplate screws to the door edge; the strike mounts in the frame to receive the latch.

Cross-Referenced Models (same family / close relatives)

• Corbin Russwin 425F / 430F / 431F / 433F series (different functions/handings).

• Corbin Russwin ML2000/ML2100 mortise platforms (later families—check trim/case compatibility).

Comparable Products (similar function from other brands)

• Schlage L9000 series mortise locks

• Sargent 8200 series

• Yale 8800 series

• Best 45H series
  (Not direct drop-ins—verify case size, backset, and trim.)

In Larger Systems / Assemblies

• Works with Corbin Russwin lever or knob trim, escutcheon/rose kits, and standard mortise cylinders (cylinder length and cam must match the trim/function).

• Pair with door closers, hinges, and exit hardware per life-safety and accessibility requirements.

• For fire-rated openings, match all components (door, frame, hinges, strike, screws) to the listing of the assembly.

Notes & Measurements

• Handing: LH as set; some cases can be field-re-handed, but sell/assume LH as shown.

• Backset/faceplate dimensions: see photos; measure your door prep to confirm fit.

• What’s not included: cylinder, levers/knobs, interior trim, mounting screws not shown.

Trademarks

Corbin Russwin® is a trademark of Assa Abloy or its affiliates. Schlage®, Sargent®, Yale®, and Best® are trademarks of their respective owners. Names are used solely for identification and comparison.

Related

corbin russwin 433f lh mortise lock case; left hand mortise lock body; commercial door lock chassis only; ul listed single point 233n; replacement mortise case with strike; device to latch commercial door; ansi mortise lock body; corbin russwin faceplate and strike set; retrofit mortise chassis; 2-3/4 backset mortise (verify)

Common Requests:

1. “Will this 433F LH fit my existing mortise pocket/backset?”

2. “Can it be re-handed or do I need a RH version?”

3. “Which trim and cylinder do I need to complete the door?”

4. “What are the faceplate and strike dimensions/holes?”

5. “Is this acceptable for a rated opening with my door/frame label?”