Corbin Russwin ML2055 Grade 1 ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,566.92
$896.65
Corbin Russwin Corbin Russwin ML2055 Mortise Classroom Lever Lockset COR-ML2055-KEYED

Corbin Russwin ML2055 Grade 1 Mortise Classroom Lever Lockset

(1 review) Write a Review

Model: COR-ML2055-NSA-626
From the ML2000_Series Collection
$1,566.92
$896.65
Selected Finish is
Selected Lever Type is
Selected Rose/Escutcheon is
Selected Cylinder Type is
  • Corbin Russwin ADDER-CORBIN RUSSWIN-[KEYING]=KD - Keyed Different ADDER-CORBIN RUSSWIN-[KEYING]=KD - Keyed Different
  • Corbin Russwin ADDER-CORBIN RUSSWIN-[KEYING]=KA - Keyed Alike ADDER-CORBIN RUSSWIN-[KEYING]=KA - Keyed Alike

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

$1,566.92
$896.65
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-KEYED Classroom Mortise Lever Lockset Grade 1, Field Reversible, 10-Year Warranty

ANSI F05 Classroom Function Mortise Lock for High-Traffic Commercial & Institutional Applications

The Corbin Russwin ML2055-KEYED is a Grade 1 classroom mortise lever lockset from the ML2000 Series, engineered for demanding commercial, institutional, industrial, and government environments. Conforming to ANSI function F05, this lock allows latchbolt retraction by grip from either side unless the outside grip is locked by key, with the inside grip always remaining free for safe egress. Constructed of heavy-gauge steel with a 1" stainless steel deadbolt and patented Quick Reversible latchbolt, the ML2055-KEYED is designed for 1-3/4" (44mm) standard door thickness and features field-reversible handing for flexible installation. The ML2000 Series has been UL cycle tested above and beyond requirements, completing 14.5 Million Cycles (Verification ID: V875753), and is backed by a 10-year limited warranty.

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 through heavy-gauge steel construction, a 1" stainless steel deadbolt, and a patented Quick Reversible latchbolt — all UL cycle tested to an exceptional 14.5 Million Cycles (Verification ID: V875753). Every ML2055-KEYED is backed by a 10-year limited warranty, providing lasting confidence for facility managers and security professionals. Engineered for the most demanding commercial, institutional, and government applications where dependable performance and life safety are essential.

Product Specs

Subcategory:
Mortise Locks
Product Group:
Mechanical Locks
Series:
ML2000 Series
Grade:
Grade 1
Keyed Function:
Single Cylinder
Standard Cylinder:
Conventional 6-pin, L4 Keyway
Standard Latch:
3/4" Latchbolt
Standard Strike:
ANSI straight lip standard, 4-7/8" x 1-1/4" x 1-1/8"
Warranty:
10 Year Limited
ANSI/BHMA:
F05
Product Subgroup:
Mortise Locks and Trim
Product Type:
Mortise Locks
Keyed:
Yes
Commercial/Residential:
Commercial
Function Description:
Latchbolt by grip either side, unless outside grip is locked by key outside Latchbolt by key when outside grip locked.
Lock Type:
Mortise
Handle Type:
Lever
Lock Function:
Classroom
Product Attribute:
Mortise Locks
Electronic:
No
Product Model:
ML2055
Collection:
ML2000_Series
Product Function:
Classroom
Door Hand Direction:
Field Reversible
Door Thickness Range:
1-3/4"
Product Category:
Mechanical Locks
Product Substrate:
Brass or Bronze
Department:
Door Hardware

Corbin Russwin COR-ML2055-NSA-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 prep the ML2055 is built for. Standard door thickness is 1-3/4 inches (44mm) and the backset is 2-3/4 inches, with a heavy-gauge steel lockcase measuring 5-7/8 x 4 x 15/16 inches into the door edge pocket. Optional thicknesses are available if your doors run heavier. Center to center, lever to cylinder is 3-5/8 inches and lever to thumbturn is 2-7/16 inches, so an existing ML2000 prep takes it straight in.
2) What does classroom function mean on a mortise lock, and does the inside lever ever lock?
Classroom function (ANSI F05) means the outside lever is locked and unlocked only by key from the outside. When it is locked, the key retracts the latchbolt. The inside lever is always free, so anyone in the room can walk out without a key or a second motion, which is what keeps the opening compliant for egress. There is no inside button or turn to lock, so a student cannot lock the room from inside.
3) Can I use the ML2055 on a fire rated classroom door?
Yes. The ML2000 Series is UL/cUL listed and UL10C positive pressure rated for 3-hour fire doors up to 4 x 10 feet single or 8 x 10 feet pair. The lock also meets ADA A117.1, carries California State Fire Marshal listing, and is Windstorm/Hurricane certified. It is ANSI/BHMA A156.13 Series 1000, Operational and Security Grade 1.
4) Do I have to order the ML2055 handed, or can I re-hand it in the field?
Order it and hand it on site. The ML2055 uses a patented Quick Reversible latchbolt, so handing is changed without opening the lock case. One caveat on trim: the Dirke lever is a handed design offered as a left hand or right hand part, so that one lever choice has to be specified for the door swing even though the lock body does not.
5) Will the ML2055 latch into the strike that is already in my frame?
It depends on what is in there now. The lock ships with an ANSI straight lip strike, 4-7/8 x 1-1/4 inches with 1-1/8 inch lip to center, and throws a 3/4 inch two-piece anti-friction latchbolt plus a 9/16 inch deadlocking auxiliary latch. If your frame already has a standard ANSI 4-7/8 inch strike prep, the supplied strike drops in. A frame cut for a smaller T-strike or a non-ANSI lip will need the opening reworked or a strike matched to that prep.
6) Can I key the Corbin Russwin ML2055 into my existing master key system, or use interchangeable cores?
Both work. Standard is a conventional 6-pin brass cylinder in the L4 keyway, shipped 0-bitted, and it can go on new or existing Corbin Russwin key systems. If your building runs a different system, order LC (less cylinder) and fit your own, since the lock accepts most other manufacturers' cylinders. For small format style interchangeable core programs, order CL6 for a 6-pin LFIC housing less core or CL7 for 7-pin. Keying is specified as KD keyed different or KA keyed alike when you want a run of classroom doors on one key.
7) Should I buy a mechanical classroom mortise lock or an electronic one for a school lockdown program?
The ML2055 is mechanical with no electronics in it, which means no batteries, no credentials and no head-end, but every lockdown is a person with a key at the outside of the door. If you want lockdown from inside the room or from a central system, ZenSupply carries electronic classroom mortise locks: the TownSteel FME-2000 Series is a Grade 1 classroom mortise lockset with RFID, the FME-4000 Series adds intruder classroom function with RFID, and the Alarm Lock DL3500CR is a Grade 1 Trilogy classroom mortise lock with 300 user codes. The Alarm Lock units are built for 1-5/8 to 1-7/8 inch doors, the TownSteel units for 1-3/4 inch.
8) What is the closest mechanical alternative to the Corbin Russwin ML2055 classroom mortise lock?
The Cal-Royal NM8070 is the straight mechanical equivalent ZenSupply stocks: a heavy duty Grade 1 classroom mortise lockset with auxiliary deadlatch, for 1-3/4 inch doors, same as the ML2055. If you want classroom function with visual status at the door, the Marks USA LA318GJ is a Grade 1 classroom security indicator mortise lockset with ANSI strike and steel escutcheon for 1-3/4 inch doors. Where the ML2055 pulls ahead is key system breadth and trim range, since it runs Corbin Russwin systems and takes most other makers' cylinders.
9) My doors are 1-5/8 inch. Can I still use the ML2055 classroom lock?
Not off the shelf. The ML2055 is set up for 1-3/4 inch doors as standard, and optional thicknesses are ordered specially. For thinner leaves, the Alarm Lock Trilogy DL2700CR and DL3500CR are Grade 1 classroom mortise locks rated for 1-5/8 to 1-7/8 inch doors, which covers that range directly.
10) Which classroom mortise lock should be used when the opening needs credentials instead of keys?
The TownSteel FME-2000 Series is a Grade 1 heavy duty classroom mortise lockset with RFID technology for a 1-3/4 inch door, and the TownSteel FME-4000 Series is an electronic intruder classroom mortise lockset with RFID, also Grade 1 heavy duty for a 1-3/4 inch door. Both cover the same door thickness as the ML2055. The ML2055 is a non-electronic mechanical classroom lock keyed with a conventional 6-pin L4 cylinder, so choosing between them is a decision about whether the opening is managed by key or by credential.
11) If the door should stay locked from the outside at all times, what mortise lock replaces a classroom function?
A storeroom function is the usual answer: the Accentra 8805FL is a Grade 1 storeroom mortise lock from the 8800 Series supplied with an Arcadia lever, and the Cal-Royal NM8080 is a heavy duty Grade 1 storeroom mortise lockset for a 1-3/4 inch door with an interchangeable core option. The ML2055 classroom function retracts the latchbolt by grip from either side unless the outside grip is locked by key, which means the outside can be left unlocked; a storeroom function does not offer that state.
12) Is a Schlage PC10 an alternative to an ML2055 classroom mortise lock?
No. The Schlage PC10 is a Grade 1 passage cylindrical lock with rose, non-keyed, for a 1-3/4 inch door. It is cylindrical rather than mortise, so it takes a bored door prep instead of a mortise pocket, and it is non-keyed. The ML2055 is a keyed mortise lock. The door prep decides this one before function does.
13) What mortise lock is used on a behavioral health or ligature resistant door instead of a standard classroom lever?
The TownSteel MRX-L-01 is a Grade 1 heavy duty anti-ligature lever mortise lockset in stainless steel with a passage function for a 1-3/4 inch door, and the MRX-A-01 is a Grade 1 heavy duty ligature resistant arch trim mortise lockset in satin stainless steel, also passage function on a 1-3/4 inch door. The Marks USA 5PDN is a Grade 1 hospital passage mortise push/pull paddleset, ligature resistant and ADA compliant in satin stainless steel. The ML2055 offers Behavioral Health trim designs (BHSS/BLSS) within its own trim range and meets ADA A117.1, so a keyed classroom function in a behavioral health setting is available on the same lock body.
14) What mortise lock is used when the classroom door has to be released or secured from an access control system?
The Command Access ML190 Series is a heavy-duty motorized mortise lock with field selectable EL/EU operation on 24VDC in a storeroom function, and the Schlage L9092EU 03A is a heavy duty electric lock/unlock outside lever mortise lock, keyed outside, with request to exit, at 12/24VDC on a 1-3/4 inch door. The ML2055 itself is not electronic, though Motorized Electric Latch Retraction is available on the ML20900 series within the same ML2000 family.
15) Which mortise lock has an intruder or lockdown function for a classroom?
The TownSteel FME-4000 Series is an electronic intruder classroom mortise lockset with RFID, Grade 1 heavy duty for a 1-3/4 inch door, and the BEST 45HCA Series is a heavy duty mortise lockbody with intruder function. The ML2055 is an ANSI F05 classroom function locked by key from the outside, so lockdown is performed at the corridor face with a key rather than from inside the room.
16) What mortise lock fits a residential-style entry door with a 2-1/2 inch backset?
The Baldwin 6301 entry/apartment mortise lock body is offered knob by knob and lever by lever on a 2-1/2 inch backset for doors 1-3/4 inch and over, and the Baldwin 6310 entry/storeroom lock body is also 2-1/2 inch backset for doors 1-3/8 inch and over, with the 6310190RRLS supplied right hand reverse lever by lever. The ML2055 uses a 2-3/4 inch backset, so the mortise pocket location in the door decides which family the opening will accept.
17) Which mortise lock should be used on a glass door or an aluminum door with a deadlatch?
The Alarm Lock DL1300NW Trilogy Networx is a wireless electronic mortise lock with keypad made for Adams Rite deadlatches, and the Kaba Ilco BR Series is a glass door bottom rail lock. The Dormakaba E-Plex 2066 is an electronic pushbutton keyless mortise lock for wide stile doors. The ML2055 is built for a 1-3/4 inch standard door with a heavy-gauge steel lock case measuring 5-7/8 by 4 by 15/16 inch, which a narrow aluminum stile will not accept.
18) Does the ML2055 have a deadbolt as well as the latch?
Yes, a one-piece stainless steel deadbolt measuring 19/32 x 1-1/4 inches with a 1 inch throw. On classroom function the security still comes from key control at the outside lever, so the bolt is not a substitute for a separate storeroom or dormitory function if what you want is a positively deadlocked door.
19) What do I need to specify when ordering an ML2055 mortise classroom lockset?
Four things decide the part. Lever design: Armstrong, Citation, Dirke, Essex, Lustra, Newport, Princeton or Regis. Rose or escutcheon: A rose at 2-1/4 inch diameter, F rose at 2-7/8 inch diameter, or M or N escutcheon. Finish, from fourteen choices including 626 satin chrome, 630 satin stainless, 613 oil-rubbed bronze and BSP black suede powder coat. Then cylinder and keying: standard L4 cylinder, LC less cylinder, CL6 or CL7 less core, keyed different or keyed alike.
20) I need classroom mortise locks that match the rest of my building. What finishes does the Corbin Russwin ML2055 come in?
Fourteen finishes, so matching existing openings is usually straightforward: 605 bright brass, 606 satin brass, 611 bright bronze, 612 satin bronze, 613 oil-rubbed satin bronze, 613E dark oxidized satin bronze equivalent, 618 bright nickel, 619 satin nickel, 625 bright chrome, 626 satin chrome, 629 bright stainless, 630 satin stainless, 722 black oxidized bronze oil-rubbed, and BSP black suede powder coat. Trim is brass or bronze substrate. For schools and healthcare corridors 626 and 630 are the usual standards.
21) How durable is the ML2000 Series mortise lock for a high traffic school corridor?
It is a Grade 1 lock, and Corbin Russwin has UL cycle tested the ML2000 Series to 14.5 million cycles (Verification ID V875753), well past the A156.13 Grade 1 requirement. Construction is a heavy-gauge steel lock case with a wrought brass, bronze or stainless armored front measuring 8 x 1-1/4 inches, and the trim is thru-bolted so it stays in alignment under abuse.
22) If I standardize on the ML2000 mortise prep now, can I change lock functions later without recutting doors?
That is the practical argument for the series. Twelve functions are configurable from one ML2054 lock body, and the case, backset and trim spacing stay the same across the family, so switching a room from classroom to storeroom or office is a lock body or kit change, not a door change. Motorized electric latch retraction is available on the ML20900 series if a door later needs to go on access control, and behavioral health trim (BHSS/BLSS) is available where a room use changes to a patient area.
23) Is a mortise lock like the ML2055 the right choice, or would a cylindrical lock do for my classrooms?
Mortise makes sense where the door is heavy, the traffic is constant and you want a deadbolt and latch in one case, which is the case in most school and institutional corridors. It needs a full mortise pocket cut into the door edge, so on a door bored for a cylindrical lock you are either recutting or staying cylindrical. ZenSupply carries cylindrical options such as the Schlage PC10 Grade 1 cylindrical lock for 1-3/4 inch doors when the existing prep is a standard bore. If the door already has a mortise pocket with a 2-3/4 inch backset, the ML2055 is the direct fit.
24) What classroom mortise lock works on a door that is thinner than 1-3/4 inch?
The Alarm Lock DL2700CR Trilogy T2 and the DL3500CR Trilogy are both Grade 1 electronic classroom mortise locks rated for a 1-5/8 inch to 1-7/8 inch door thickness range, and the DL3500CR carries 300 user codes. The DL2700CR is weatherproof, which matters on an exterior classroom or portable-building opening. The ML2055 is designed for 1-3/4 inch standard door thickness, so a door outside that dimension is where these alternates apply.
25) What is the difference between a classroom mortise lock and an office or entrance function mortise lock?
The Cal-Royal NM8050 is a heavy duty Grade 1 office/entrance mortise lockset with an auxiliary deadlatch for a 1-3/4 inch door, and the Hager 3850E is a Grade 1 office mortise lock with lever and escutcheon on a 2-3/4 inch backset, non-keyed, for doors 1-3/4 inch to 2-1/2 inch. The ML2055 is an ANSI F05 classroom function, where the latchbolt is retracted by grip from either side unless the outside grip is locked by key from the outside. Office and entrance functions are the choice where the outside is controlled from inside the room rather than by key at the corridor face.
26) What mortise lock goes on a restroom or dorm room door instead of a classroom lock?
For a privacy opening, the Cal-Royal NM8440 is a heavy duty Grade 1 privacy mortise lockset with a deadbolt for a 1-3/4 inch door, and the Hager 3840S is a Grade 1 privacy mortise lock on a 2-3/4 inch backset for doors 1-3/4 inch to 2 inch. Both are bed and bath privacy function. The ML2055 is a keyed single cylinder classroom lock, so it is the corridor-side lock rather than the occupant-controlled one.
27) What mortise lock matches a classroom lock on the non-locking doors in the same corridor?
For openings in the same run that only need a latch, the Falcon MA101 is a Grade 1 heavy duty mortise passage lock with field reversible operation and a fire rating, from the MA Series, and the Schlage PM010 is a Grade 1 non-keyed passage latch mortise lock for a 1-3/4 inch door. Both cover passage, hall and closet openings that need no key. The ML2055 shares the field reversible handing approach and the same 1-3/4 inch door thickness, which keeps the door prep consistent across the corridor.
28) Can a BEST 45H mortise lock body be ordered in place of an ML2055 classroom lockset?
They are not the same scope of supply. The BEST 45H Series is a heavy duty mortise lock body with public entrance function and field reversible operation, and the 45HCA Series is a heavy duty mortise lockbody with intruder function. Both are lock bodies, so lever trim and roses are separate. The ML2055 is a complete classroom lever lockset ordered with a lever design and rose or escutcheon selection, so a lock body alone will not finish the opening.
29) What mortise lock replaces a classroom function on a dormitory or corridor door that needs a deadbolt?
The Sargent 7925 is a Grade 1 heavy duty dormitory exit function mortise lock from the 7900 Series with rose trim and a single cylinder deadbolt, built for corridor and dormitory openings. The ML2055 lock body carries a one-piece stainless steel deadbolt with a 1 inch throw, and 12 functions are configurable from the one ML2054 lockbody, so a deadbolt-bearing function is reachable within the same series as well.
30) What is the difference between an ML2055 and a mortise deadbolt like the Sargent 4874 or Kaba Ilco 185?
The Sargent 4874 is a double cylinder mortise deadbolt on a 2-3/4 inch backset from the 4870 Series, and the Kaba Ilco 185 Series is a no-handing mortise deadbolt sold single pack. Neither carries a latchbolt or lever, so they secure a door but do not operate it. The ML2055 is a lever lockset on a 2-3/4 inch backset with a 3/4 inch throw latchbolt, and a deadbolt is part of the same lock case rather than a second device in the door.
31) Which mortise locks suit an ornamental iron or narrow storefront door rather than a 1-3/4 inch classroom door?
The Marks USA 21AC and 22AC are entrance double cylinder ornamental iron mortise locks with a round knob, both built for a 1 inch door thickness. The Codelocks CL2255 is a medium duty electronic tubular mortise latch in brushed steel from the CL2000 Series. The ML2055 is designed for a 1-3/4 inch standard door, so a thin iron or narrow stile door calls for one of the narrow-door bodies instead.
32) What Grade 1 mortise lock is available with a keypad instead of a key for a classroom or office?
The BEST 45HZ EZ Series is an electronic keypad mortise lock with key override, and the Dormakaba E-Plex E5086 is a Grade 1 back to back entry/egress electronic pushbutton and card lock mortise lock from the 5X86 Series. The Dormakaba PowerPlex P2066 Series is a mortise lock from the PowerPlex 2000 Series. The ML2055 is mechanical and keyed with a conventional 6-pin L4 cylinder, so a keypad option means moving to a different lock body rather than adding a module.
33) Does a Grade 2 electronic mortise lock cover the same openings as an ML2055?
Not at the same grade. The Schlage Electronics LEBMB-ADD mobile-enabled mortise lock with push button and LED is Grade 2 with a 3 hour fire rating for a 1-3/4 inch door, offering privacy, office and apartment functions. The Schlage LEMD-GRW ENGAGE Series wireless mortise lock with 125kHz proximity reader is Grade 1 with a 3 hour fire rating. The ML2055 is ANSI/BHMA Grade 1 with UL10C 3-hour positive pressure listing, so a project specifying Grade 1 rules the Grade 2 option out on the specification alone.
34) Which rose or escutcheon should I pick for the ML2055, and does it change how the lock mounts?
Trim choice is cosmetic and coverage, not function. The A rose is 2-1/4 inches in diameter and the F rose 2-7/8 inches, both small round trims that suit a clean door face. The M and N escutcheons are full plates, which is what you want when you are covering an older prep or scarring from previous hardware, and status indicator options for locked/unlocked visibility are available on both sectional and escutcheon trim. All designs are thru-bolted.
35) Is an Emtek mortise entrance lockset an alternative to an ML2055?
No. The Emtek 3102 Memphis, 3104 Hamilton, 3106 Manhattan and 3019 Brisbane mortise entrance locksets are all dummy function, meaning they do not latch or lock. The ML2055 is a keyed Grade 1 classroom lockset for commercial use. Dummy trim suits an inactive leaf; it will not secure a classroom.
36) Can a Hager 3810 passage mortise lock be used where an ML2055 classroom lock is specified?
No. The Hager 3810E and 3810S are Grade 1 passage mortise locks on a 2-3/4 inch backset for doors 1-3/4 inch to 2-1/2 inch, the 3810E with escutcheon and the 3810S with rose. Passage function means the latch operates from both sides at all times with no key. The ML2055 is keyed with a single cylinder classroom function, which is the point of a classroom opening.
How fast can I get the Corbin Russwin COR-ML2055-NSA-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 COR-ML2055-NSA-626 come with a warranty?
Absolutely. The Corbin Russwin COR-ML2055-NSA-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 COR-ML2055-NSA-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 COR-ML2055-NSA-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.

Videos

Product Reviews

  • 4
    Corbin Russwin ML2055 class room mortise lock

    Posted by Terry on Jan 13th 2025

    Good lock that will last for years

!