Corbin Russwin 435F73-8 Grade ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$29.53
Corbin Russwin 435F73-8 Grade 1 C/R ML2200 Double Locking Knob Kit

Corbin Russwin 435F73-8 Grade 1 C/R ML2200 Double Locking Knob Kit

(No reviews yet) Write a Review

Model: 435F73-8

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

$29.53
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

Corbin Russwin 435F73-8 ML2200 Double Locking Knob Kit for ML2000 Series

Commercial-Grade Double Locking Knob Replacement Kit for ML2000 Series Locks

The Corbin Russwin 435F73-8 is a professional-grade Double Locking Knob Kit designed specifically for use with the ML2000 Series locksets. This commercial-quality replacement kit provides the essential double locking knob components needed to restore or upgrade ML2000 Series hardware to proper operating condition. Engineered to Corbin Russwin's exacting standards, this kit ensures reliable locking performance in demanding commercial door hardware applications.

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
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings

Why Choose Corbin Russwin Quality?

Corbin Russwin door hardware components are manufactured to rigorous commercial-grade standards, ensuring consistent performance and compatibility across the ML2000 Series product line. The 435F73-8 Double Locking Knob Kit reflects Corbin Russwin's commitment to providing reliable, professionally engineered replacement parts that maintain the integrity of installed lockset systems. Ideal for facility managers, locksmiths, and door hardware professionals requiring dependable components for commercial applications.

Manufacturer Resources

Corbin Russwin Condensed Catalog

Product Specs

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

Corbin Russwin 435F73-8 – Frequently Asked Questions

1) What does the Corbin Russwin 435F73-8 double locking knob kit actually do?
It's a replacement locking-knob kit for Corbin Russwin ML2000 Series mortise locks. The double locking knob is the pair of inside knob components that control the lock function on the lockbody, so the kit is what you order when the locking knobs on an installed ML2000 mortise lock are worn, damaged, or being swapped out rather than replacing the whole lockset. It is a commercial door hardware part, not a residential one.
2) Will the 435F73-8 kit fit my Corbin Russwin ML2200 mortise lock?
Yes. The 435F73-8 is built for the ML2000 Series family, which the ML2200 falls under. It is a Corbin Russwin factory part for that lockbody, so it is not a universal knob kit and won't fit Sargent, Schlage, or Yale mortise cases.
3) Is the ML2000 mortise lock this kit serves rated for a fire door?
It is UL/cUL listed to UL10C positive pressure, with a 3-hour fire rating up to a 4 ft x 10 ft single door or an 8 ft x 10 ft pair. It also carries ANSI/BHMA A156.13 Series 1000 Operational and Security Grade 1, ADA A117.1, California State Fire Marshal, and windstorm/hurricane certification. Keeping genuine Corbin Russwin parts in the lock is how that listing stays intact.
4) Can I keep my building's existing key system when I service an ML2000 mortise lock?
Yes. The ML2000 works with new or existing Corbin Russwin key systems and accepts most other manufacturers' cylinders. The standard cylinder is brass, 6-pin, L4 keyway, shipped 0-bitted so a locksmith can pin it to the house key. Spacing is 3-5/8 inches center to center from knob or lever to cylinder, and 2-7/16 inches from knob or lever to thumbturn, which is what governs whether the trim you have lines up.
5) What backset and door thickness do ML2000 Series mortise locks use, so I know what I'm working with?
The ML2000 Series mortise lock runs a 2-3/4 inch (70mm) backset and is built for 1-3/4 inch (44mm) doors as standard, with optional thicknesses available. The lockcase itself measures 5-7/8 x 4 x 15/16 inches and the armored front is 8 x 1-1/4 inches. Those are the numbers that decide whether an existing mortise pocket takes the lock the 435F73-8 kit goes into.
6) Do I need to worry about handing when replacing knobs on an ML2000 mortise lock?
The lock is handed, but Corbin Russwin's ML2000 uses a quick reversible latchbolt, so the handing can be reversed without opening the lock case. For a locksmith that means a knob kit swap does not lock you into the original hand of the opening.
7) Will the ML2000 latch still catch my existing ANSI strike after I rework the lock?
The latchbolt is a two-piece anti-friction design with a 3/4 inch (19mm) throw, backed by an auxiliary deadlocking latchbolt at 9/16 inch (14mm) effective throw, and the deadbolt throws a full 1 inch. The factory strike is a standard ANSI straight lip, 4-7/8 x 1-1/4 inches with 1-1/8 inch lip to center. If your frame is already prepped for an ANSI strike of that size, the latch and bolt land where they should.
8) Is a knob kit enough, or should I be replacing the whole ML2000 lockbody?
If the lockcase is sound and only the locking knob components are worn, the 435F73-8 kit restores function without pulling the case out of the door. Go to a full lockbody when the case itself is damaged or when you want a different function, since one ML2054 lockbody can be configured to 12 functions. Bear in mind the ML2000 case is tested to 14.5 million cycles, so the case usually outlasts the trim on it.
9) Where does the ML2000 mortise lock make sense for a property manager standardizing a building?
It is a commercial Grade 1 mortise platform used in offices, schools, healthcare, retail, industrial and warehouse space, multi-tenant residential, and government buildings. Because a single lockbody covers 12 functions and takes a wide range of trim, including Museo, Vineyard, and Behavioral Health (BHSS/BLSS), you can run one lock family across mixed openings and change function or trim per door instead of stocking different locks.
10) Can the ML2000 mortise lock be electrified for access control?
Yes, through the ML20900 series, which offers Motorized Electric Latch Retraction (MELR). Status indicator options are also available on sectional and escutcheon trim so staff can see locked or unlocked at a glance. Those are lockbody and trim level decisions, specified separately from a knob kit.
How fast can I get the Corbin Russwin 435F73-8 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 435F73-8 come with a warranty?
Absolutely. The Corbin Russwin 435F73-8 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 435F73-8?
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 435F73-8 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.
!