Corbin Russwin 423F32-8 Grade ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$13.23
Corbin Russwin 423F32-8 Grade 1 ML2000 Locking Hub for Knob

Corbin Russwin 423F32-8 Grade 1 ML2000 Locking Hub for Knob

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Model: 423F32-8

In Stock (leaves warehouse same day if ordered before 3pm ET)

$13.23
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Corbin Russwin 423F32-8 ML2000 Locking Hub for Knob Commercial Mortise Lock Replacement Part

Genuine ML2000 Series Replacement Component for Commercial Knob Assemblies

The Corbin Russwin 423F32-8 is a genuine locking hub replacement part designed specifically for use with the ML2000 Series mortise lockset platform. This commercial-grade component ensures proper locking function within compatible ML2000 knob assemblies, maintaining the performance and reliability that Corbin Russwin mortise hardware is known for. Intended for commercial door hardware applications, this part is an essential service component for facilities maintaining ML2000 Series mortise locksets.

Professional Features & Benefits

  • ANSI/BHMA Grade 1 mortise lock per A156.13 Series 1000, Operational and Security Grade 1
  • UL Cycle above and beyond: 14.5 Million Cycles (Verification ID: V875753)
  • Patented Quick Reversible latchbolt — reverse handing without disassembling the lock case
  • Multi-function capability: 12 functions configurable from one ML2054 lockbody
  • Heavy-gauge steel lockcase 5-7/8" x 4" x 15/16"; 1" stainless steel deadbolt, 1" throw
  • 3/4" (19mm) throw anti-friction two-piece latchbolt requires less force to close
  • Wide variety of trim designs including Muséo®, Vineyard™, Behavioral Health (BHSS/BLSS)
  • Status indicator options for locked/unlocked visibility (sectional and escutcheon trim)
  • Motorized Electric Latch Retraction (MELR) available for ML20900 series
  • Thru-bolted trim designs for proper alignment and increased security
  • Can be used with new or existing Corbin Russwin key systems; accepts most other manufacturers' cylinders
  • UL/cUL listed, UL10C positive pressure; 3-hour fire door up to 4' x 10' single or 8' x 10' pair
  • Ten-year mechanical warranty; five-year MELR; two-year electrical

Technical Specifications

  • Grade: ANSI/BHMA A156.13 Series 1000, Operational and Security Grade 1
  • Handing: Handed; quick reversible — re-handed without disassembling the lock case
  • Door Thickness: 1-3/4" (44mm) standard; optional thicknesses available
  • Backset: 2-3/4" (70mm)
  • Lockcase: Heavy-gauge steel, 5-7/8" (149mm) x 4" (102mm) x 15/16" (24mm)
  • Armored Front: Wrought brass, bronze, or stainless steel, 8" x 1-1/4"
  • Latchbolt: 2-piece mechanical with anti-friction insert, 5/8" x 1" x 3/4" (19mm) throw
  • Auxiliary Latchbolt: 9/16" (14mm) effective throw; deadlocking
  • Deadbolt: One-piece stainless steel, 19/32" x 1-1/4" x 1" (25mm) throw
  • Strike: Wrought brass, bronze, or stainless steel, ANSI straight lip, 4-7/8" x 1-1/4" x 1-1/8" lip to center
  • Cylinder: Brass, 6-pin L4 keyway, 0-bitted standard
  • Spacing: C. to c. knob/lever to cylinder: 3-5/8" (92mm); knob/lever to thumbturn: 2-7/16" (62mm)
  • Certifications: ANSI/BHMA A156.13 Grade 1; UL/cUL UL10C 3-hour positive pressure; ADA A117.1; California State Fire Marshal; Windstorm/Hurricane certified
  • Warranty: Ten-year mechanical; five-year MELR; two-year electrical

Professional Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Retail Establishments
  • Government and Municipal Buildings
  • Multi-Tenant Residential Properties
  • Industrial and Warehouse Facilities

Why Choose Corbin Russwin Quality?

Corbin Russwin door hardware components are engineered to commercial-grade standards, delivering consistent performance across the ML2000 Series mortise lock platform. This genuine replacement locking hub preserves the operational integrity of your existing ML2000 installation, ensuring the locking mechanism continues to function as originally designed. Trusted by locksmiths, facilities managers, and commercial contractors, Corbin Russwin parts provide the reliability required in high-demand commercial environments.

Product Specs

Product Group:
Lock Parts and Accessories
Product Subgroup:
Parts and Accessories
Product Type:
Knob
Commercial/Residential:
Commercial
Subcategory:
Parts and Accessories
For Use With:
ML2000
Product Function:
Knob
Department:
Door Hardware

Corbin Russwin 423F32-8 – Frequently Asked Questions

1) What exactly is the Corbin Russwin 423F32-8, and what part of the lock does it replace?
It's the locking hub for a knob on Corbin Russwin ML2000 Series mortise locksets. The hub is the internal component the knob spindle engages, so it's what transmits knob rotation and holds the locking function inside the case. It is a single service component, not a complete lockset and not the knob itself, so you still reuse your existing lockbody, trim, and cylinder.
2) Will the 423F32-8 locking hub work in a lever-trim ML2000 mortise lock?
No. The 423F32-8 hub is the knob version. If your ML2000 opening uses lever trim, you need the lever hub instead, since the hub is matched to the trim type it drives. Confirm you are looking at knob trim before ordering this one.
3) Our building standardizes on ML2000 mortise locks. Is repairing with this hub as good as replacing the whole lock for a Grade 1 spec opening?
Using the genuine ML2000 knob locking hub keeps the assembly to its original build. The ML2000 lockset is ANSI/BHMA A156.13 Series 1000 Operational and Security Grade 1, UL/cUL listed to UL10C positive pressure for 3-hour fire doors up to 4 ft x 10 ft single or 8 ft x 10 ft pair, and tested to 14.5 million cycles. Swapping in a non-OEM hub is what puts that listing at risk on a fire-rated opening.
4) Is this hub compatible with all ML2000 mortise lock functions, like the ML2054 multi-function body?
It is built for the ML2000 Series mortise platform, which includes the ML2054 lockbody that can be configured to 12 different functions from one case. The hub serves the knob side of that platform, so it applies across ML2000 knob-trim locks rather than being tied to one single function number.
5) Do I need to re-hand anything when I install this hub in an ML2000 lock?
The ML2000 uses a patented quick reversible latchbolt, so handing is reversed without disassembling the lock case. Servicing the knob hub does not force you into a handing change, and the lock itself is handed but field reversible.
6) What door thickness and backset do the ML2000 locks this hub fits use?
Standard is a 1-3/4 inch (44mm) door with a 2-3/4 inch (70mm) backset, and optional thicknesses are available on the ML2000. The lockcase itself is heavy-gauge steel at 5-7/8 x 4 x 15/16 inches, so the mortise pocket is unchanged when you only service the knob hub.
7) Will my existing strike and latch prep still work after servicing the lock with this hub?
Yes, nothing about the latching geometry changes. The ML2000 latchbolt is a 2-piece anti-friction unit with 3/4 inch (19mm) throw, the auxiliary latchbolt has 9/16 inch (14mm) effective deadlocking throw, and the deadbolt is one-piece stainless with 1 inch throw against an ANSI straight lip strike, 4-7/8 x 1-1/4 inches with 1-1/8 inch lip to center. Replacing the knob hub does not alter any of it.
8) Can I keep my existing cylinders and keyway when servicing an ML2000 knob lock?
Yes. The ML2000 works with new or existing Corbin Russwin key systems and accepts most other manufacturers' cylinders. Factory standard is a brass 6-pin L4 keyway, 0-bitted. Trim spacing is 3-5/8 inches (92mm) center to center from knob to cylinder and 2-7/16 inches (62mm) knob to thumbturn, which is useful if you're matching existing door prep.
9) Does the ML2000 platform this hub fits meet ADA and fire marshal requirements for institutional work?
The ML2000 Series carries ANSI/BHMA A156.13 Grade 1, UL/cUL UL10C 3-hour positive pressure, ADA A117.1, California State Fire Marshal, and windstorm/hurricane certification. Note that ADA compliance at the opening also depends on the trim you use, since knobs are not always acceptable on accessible routes.
10) Is the 423F32-8 suitable for residential doors?
It is a commercial component. The hub serves ML2000 Series mortise locks used in offices, schools, healthcare, retail, government buildings, multi-tenant residential, and industrial facilities. For a single-family house with a bored cylindrical lock, a mortise hub is the wrong part entirely.
How fast can I get the Corbin Russwin 423F32-8 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Corbin Russwin 423F32-8 come with a warranty?
Absolutely. The Corbin Russwin 423F32-8 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Corbin Russwin 423F32-8?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Corbin Russwin 423F32-8 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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