Corbin Russwin ML2055 Grade 1 ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,281.64
$735.88
Corbin Russwin ML2055 Grade 1 Mortise Classroom with LW-Lustra Lever, A Rose, 626 Satin Chrome

Corbin Russwin ML2055 Grade 1 Mortise Classroom with LW-Lustra Lever, A Rose, 626 Satin Chrome

(No reviews yet) Write a Review

Model: ML2055-LWA-626
$1,281.64
$735.88
Selected Finish is
Selected Lever Type is
Selected Rose/Escutcheon is

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

$1,281.64
$735.88
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 ML2055-LWA-626 Mortise Classroom Lock with LW Lustra Lever, A Rose, Satin Chrome Finish

Grade 1 Commercial Mortise Lock for High-Traffic Institutional Applications

The Corbin Russwin ML2055-LWA-626 is a Grade 1 mortise classroom lock from the ML2000 Series, engineered for demanding commercial, institutional, industrial, and government environments. Featuring ANSI function F01, this lock allows latchbolt retraction by grip from either side with both grips always free, making it ideally suited for classroom security applications. Constructed of heavy-gauge steel with a 1" stainless steel deadbolt and Corbin Russwin's patented Quick Reversible latchbolt, the ML2055 is finished in 626 Satin Chrome with the LW Lustra lever on an A Rose, delivering both durability and refined aesthetics for offices, schools, hospitals, hotels, and other high-use facilities.

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

  • Educational Facilities and Classrooms
  • Commercial Office Buildings
  • Healthcare Institutions and Hospitals
  • Hotels and Hospitality Properties
  • Government and Municipal Buildings
  • Industrial and Institutional Facilities
  • Multi-Tenant Residential and Mixed-Use Properties

Why Choose Corbin Russwin Quality?

Corbin Russwin ML2000 Series mortise locks deliver professional-grade reliability backed by heavy-gauge steel construction and a 1" stainless steel deadbolt, with UL Cycle testing verified at 14.5 Million Cycles (Verification ID: V875753) — performance that goes well above and beyond standard requirements. The ML2055 is covered by a 10-year warranty, providing long-term confidence for facility managers and security professionals. Engineered for the most demanding commercial, institutional, and government applications, Corbin Russwin mortise locks combine proven durability, versatile trim options, and field-reversible convenience in a single, trusted solution.

Product Specs

Product Group:
Parts and Accessories
Series:
ML2000 Series
Grade:
Grade 1
Product Subgroup:
Parts and Accessories
Product Type:
Lock Trim
Commercial/Residential:
Commercial
Lock Type:
Mortise
Subcategory:
Parts and Accessories
Product Attribute:
Parts and Accessories
Product Model:
ML2055
Product Function:
Classroom
Door Hand Direction:
Field Reversible
Product Category:
Mechanical Locks
Department:
Door Hardware

Corbin Russwin ML2055-LWA-626 – Frequently Asked Questions

1) Will the Corbin Russwin ML2055 classroom mortise lock fit a 1-3/4 inch door with a 2-3/4 inch backset prep?
That is exactly the standard prep for the ML2055. Door thickness is 1-3/4 inches (44mm) standard, with optional thicknesses available, and the backset is 2-3/4 inches (70mm). The lockcase is heavy-gauge steel at 5-7/8 x 4 x 15/16 inches, so the mortise pocket has to accept that case, and the armored front measures 8 x 1-1/4 inches. If your existing openings are prepped for an ANSI mortise pocket with a 2-3/4 inch backset, the case and front drop in.
2) How does an ANSI F01 classroom function actually work day to day for a school?
With ANSI function F01, the latchbolt retracts by grip from either side and both grips are always free. Nobody gets locked in or out by the lever. Security on the opening comes from the deadbolt, a one-piece stainless steel bolt with a 1 inch (25mm) throw, thrown by key. That is the classic classroom setup: free egress at all times, and the room is secured deliberately with a key rather than by a button that can be left in the wrong state.
3) Do I have to order the ML2055 mortise lock handed, or can I re-hand it in the field?
Order it and re-hand it on site. The ML2055 uses Corbin Russwin's patented Quick Reversible latchbolt, so handing is reversed without disassembling the lock case, and the catalog data lists it as field reversible. For a property manager stocking one lock for a run of mixed-swing doors, that means one part number covers left and right hand openings.
4) What is the difference between ordering the ML2055 standard and less cylinder?
Less cylinder means the lock ships without a cylinder so you can install your own, which is what a locksmith or an in-house shop wants when the building is on an existing key system. The standard build comes with a brass 6-pin L4 keyway cylinder, 0-bitted, ready to pin to your bitting. Both builds are offered with the LW Lustra lever in 626 Satin Chrome, on either the A Rose or the M Escutcheon.
5) Can I key the ML2055 into my building's existing key system, including a non-Corbin Russwin system?
Yes on both counts. The ML2055 works with new or existing Corbin Russwin key systems, and it accepts most other manufacturers' cylinders, so a building already keyed to another brand can be matched. The factory cylinder is a brass 6-pin L4 keyway supplied 0-bitted. If your shop is supplying the cylinders, order the less cylinder version instead.
6) Is the ML2055 mortise lock approved for a 3 hour fire rated classroom door?
It is UL and cUL listed, UL10C positive pressure, for 3-hour fire doors up to 4 ft x 10 ft single or 8 ft x 10 ft pair. It also carries ANSI/BHMA A156.13 Series 1000 Grade 1 for both operational and security, ADA A117.1, California State Fire Marshal, and windstorm/hurricane certification. That covers the paperwork most institutional and government specs ask for on a corridor or classroom opening.
7) Will the ML2055 latch into the strike already in my frame?
The latchbolt is a two-piece mechanical bolt with an anti-friction insert, 5/8 x 1 inch with a 3/4 inch (19mm) throw, and there is a deadlocking auxiliary latchbolt with a 9/16 inch (14mm) effective throw. The deadbolt throws 1 inch. The supplied strike is an ANSI straight lip, 4-7/8 x 1-1/4 inches with a 1-1/8 inch lip to center. If your frame already has a standard ANSI 4-7/8 inch strike prep, the throws and the strike match up; if the old lock used a smaller T-strike, you are cutting the frame for the ANSI prep.
8) Should I use a mortise lock like the ML2055 or a cylindrical lever lock on a classroom door?
A mortise lock is the choice when you want a separate key-thrown deadbolt and Grade 1 security on a high-traffic opening, and when the door is already prepped with a mortise pocket. The ML2055 gives you a 1 inch stainless deadbolt on top of the latch, and it is UL cycle verified at 14.5 million cycles. It does require a mortise pocket in the door edge, so on a door bored for a cylindrical lock you would either replace the door or use a cylindrical Grade 1 classroom lock instead. Where the pocket exists, mortise is the heavier and more serviceable option.
9) What is the difference between the A Rose and the M Escutcheon trim on the Corbin Russwin ML2055?
The A Rose is a 2-1/4 inch diameter round rose behind the lever, so you see mostly door face. The M Escutcheon is a full plate that runs the length of the trim and covers the cylinder and lever together, which is what you want if the old trim left larger holes or scarring in the door face. Both are offered with the LW Lustra wrought lever in 626 Satin Chrome, in standard and less cylinder builds. Trim is thru-bolted for alignment and added security, and status indicator options showing locked or unlocked are available on sectional and escutcheon trim.
10) If I standardize on the Corbin Russwin ML2000 mortise lock, can I change functions later without buying whole new locks?
That is the argument for standardizing on this family. Twelve functions are configurable from a single ML2054 lockbody, so a facility can stock one body and set openings up as classroom, office, storeroom and so on rather than carrying a dozen part numbers. Trim options run wide as well, including Museo, Vineyard, and Behavioral Health (BHSS/BLSS) designs, so the aesthetic can change without changing the lock platform. Motorized Electric Latch Retraction is available on the ML20900 series if some openings need to go electrified.
11) How much clearance do I need between the lever and the cylinder when laying out the ML2055 trim?
Center to center from knob or lever to cylinder is 3-5/8 inches (92mm), and lever to thumbturn is 2-7/16 inches (62mm). Those are the numbers to check against an existing door prep before you commit, because a door drilled for another maker's mortise trim spacing will not line up even though the mortise pocket itself is standard.
12) Will the ML2055 hold up on a heavily used corridor or dorm door?
The durability numbers are the reason this lock ends up in schools and hospitals: ANSI/BHMA A156.13 Series 1000 Grade 1 for operational and security, and UL cycle testing verified at 14.5 million cycles (Verification ID V875753). The case is heavy-gauge steel and the deadbolt is one-piece stainless. The anti-friction insert in the two-piece latchbolt also means less force to close, which matters on a door with a closer that is fighting stack pressure.
13) Is 626 Satin Chrome going to match the rest of the hardware in my building?
626 Satin Chrome is the most common commercial finish in North America and it is the finish this lock is built in, with the LW Lustra wrought lever. If your closers, exit devices and existing lever trim are 626, this matches. Against 630 stainless it reads close but not identical, and it will not match brass finishes like 605 or 612.
How fast can I get the Corbin Russwin ML2055-LWA-626 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 ML2055-LWA-626 come with a warranty?
Absolutely. The Corbin Russwin ML2055-LWA-626 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 ML2055-LWA-626?
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 ML2055-LWA-626 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.
!