Corbin Russwin ML2051 Grade 1 ...
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Corbin Russwin Corbin Russwin ML2051 Mortise Entrance or Office Lockset COR-ML2051-KEYED

Corbin Russwin ML2051 Grade 1 Mortise Entrance or Office Lockset

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Model: ML2051-NSA-626
From the ML2000_Series Collection
$1,566.92
$922.77
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  • 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

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Corbin Russwin ML2051-KEYED Grade 1 Mortise Entrance/Office Lock with Field Reversible Latchbolt

Commercial-Grade Mortise Security for High-Traffic Entrance and Office Applications

The Corbin Russwin ML2051-KEYED is a Grade 1 mortise entrance and office lockset from the ML2000 Series, engineered for demanding commercial, institutional, industrial, and government environments. Conforming to ANSI function F04, this lock features a latchbolt operated by key when the outside grip is locked by toggle action stop, with the inside grip always free for safe egress. Constructed of heavy-gauge steel with a 3/4" latchbolt and a 1" stainless steel deadbolt, the ML2051-KEYED is designed for 1-3/4" (44mm) standard door thickness and delivers an auxiliary latch that deadlocks the latchbolt for enhanced security. The ML2000 Series has been UL cycle tested above and beyond requirements, completing 14.5 Million Cycles (Verification ID: V875753), making it one of the most rigorously validated mortise locks available for high-use 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 and Schools
  • Healthcare Institutions and Hospitals
  • Hotels and Hospitality Properties
  • Industrial and Government Facilities
  • Multi-Tenant Residential and Institutional Properties
  • High-Traffic Entrance and Secured Office Environments

Tamper-Resistant Design

The ML2000VR (Vandal Resistant) Series option features stainless steel escutcheons with tapered edges and Torx® pin tamper-resistant screws, providing a vandal-resistant barrier for applications requiring heightened security against abuse and unauthorized access attempts.

Why Choose Corbin Russwin Quality?

Corbin Russwin ML2000 Series mortise locks are built to Grade 1 commercial standards with heavy-gauge steel construction and a 1" stainless steel deadbolt, UL cycle tested to an exceptional 14.5 Million Cycles (Verification ID: V875753) for proven long-term reliability. Backed by a 10 Year Limited warranty and featuring the patented Quick Reversible latchbolt, these locks deliver life safety and security in a single door prep. Engineered for offices, schools, hospitals, hotels, and other demanding high-use commercial applications where dependable performance is 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:
F04
Product Subgroup:
Mortise Locks and Trim
Product Type:
Mortise Locks
Keyed:
Yes
Commercial/Residential:
Commercial
Function Description:
Latchbolt by key when outside grip locked by toggle action stop. Latchbolt by grip either side, unless outside grip is locked by toggleaction stop.
Lock Type:
Mortise
Lock Function:
Entrance/Office
Segment:
Door Hardware
Product Attribute:
Mortise Locks
Electronic:
No
Product Model:
ML2051
Collection:
ML2000_Series
Product Function:
Entrance/Office
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 ML2051-NSA-626 – Frequently Asked Questions

1) Will the Corbin Russwin ML2051 mortise lock fit a 1-3/4 inch commercial door?
Yes. The ML2051 is built for 1-3/4 inch (44mm) door thickness as standard, which is the usual commercial door, with optional thicknesses available from the factory. It's a 2-3/4 inch backset mortise lock, so the door needs a standard ANSI mortise pocket prep, not a cylindrical bore.
2) What does the ML2051 entrance/office function actually do at the door?
The ML2051 is an F04 entrance/office lock. The outside lever is locked and unlocked by a toggle stop in the lock case edge, not by the key. When the toggle is thrown, the outside lever is rigid and the key retracts the latchbolt; when it isn't, the lever works from either side. The inside lever always retracts the latch for free egress, so it never traps anyone in the room. That toggle behavior is why offices use it: staff set it once in the morning and once at close instead of keying the door twice a day.
3) Do I have to order the ML2051 handed, or can it be reversed on site?
Order it and re-hand it in the field. The ML2051 uses Corbin Russwin's patented Quick Reversible latchbolt, so the handing is changed without opening the lock case. For a property manager stocking spares across a building, that means one lock body covers left and right hand openings. The one exception on the trim side is the Dirke lever, which comes as a left hand or right hand lever, so that choice is made at the order.
4) Will the ML2051 latch into the strike that's already in my frame?
It depends what's in the frame now. The ML2051 ships with an ANSI straight lip strike, 4-7/8 x 1-1/4 inches with 1-1/8 inch lip to center, and the latchbolt has a 3/4 inch (19mm) throw with a 9/16 inch deadlocking auxiliary latch behind it. If your frame already carries a standard ANSI mortise strike cutout, the supplied strike drops straight in. A frame prepped for a cylindrical lock's smaller T-strike will need to be re-prepped, since the lip-to-center and cutout are different.
5) Can I key the ML2051 into my existing Corbin Russwin master key system, or use my own cylinders?
Both work. The ML2051 takes a conventional 6-pin brass cylinder in the L4 keyway, supplied 0-bitted as standard, and it can be brought into a new or existing Corbin Russwin key system. It also accepts most other manufacturers' cylinders, so a locksmith standardizing a building on another keyway isn't locked out. If you're pinning it yourself or using an interchangeable core, order it LC (less cylinder), CL6 (LFIC 6-pin less core) or CL7 (LFIC 7-pin less core).
6) Is the Corbin Russwin ML2051 approved for a 3-hour fire rated door?
Yes. The ML2051 is UL and cUL listed to UL10C positive pressure and carries a 3-hour fire door rating up to a 4 x 10 foot single door or an 8 x 10 foot pair. It also meets ANSI/BHMA A156.13 Series 1000 at Operational and Security Grade 1, ADA A117.1, California State Fire Marshal, and windstorm/hurricane certification. For a hospital or school corridor door where the AHJ checks the label, those are the listings on the record.
7) Should I use an entrance/office mortise lock or a storeroom function for a tenant office door?
Depends who controls the door. Entrance/office, like the ML2051, lets the occupant leave the outside lever unlocked during business hours using a toggle stop, then lock it on the way out. Storeroom function never unlocks from the lever, the outside is always locked and the key is the only way in, which suits a mechanical room or supply closet but frustrates an office that wants the door open all day. If storeroom is what you actually need, the Cal-Royal NM8080 and the Accentra 8805FL are Grade 1 storeroom mortise locks. For a classroom door, Cal-Royal's NM8070 is the classroom function version.
8) What is the closest equivalent to a Corbin Russwin ML2051 mortise entrance/office lock from another manufacturer?
The Cal-Royal NM8050 is the nearest match on function and grade. Both are Grade 1 mortise locksets with the Entrance/Office function, and both are built for 1-3/4 inch doors. The NM8050 is a heavy duty lockset with an auxiliary deadlatch, and the ML2051 carries an auxiliary latchbolt that deadlocks the latchbolt as well. If a drawing calls out an Entrance/Office mortise lock at Grade 1 and the specifier allows an equal, the NM8050 is the peer that lines up feature for feature.
9) The office door needs to stay locked at all times from the outside, not toggled. What mortise lock should be used instead of the ML2051?
Go to a storeroom function. The ML2051 uses an Entrance/Office function where the outside grip is locked and unlocked by a toggle action stop inside the lock, so anyone on the inside can leave the door unlocked. A storeroom lock has no toggle: the Accentra 8805FL is a Grade 1 storeroom mortise lock from the 8800 Series, and the Cal-Royal NM8080 is a Grade 1 storeroom mortise lockset for 1-3/4 inch doors with an interchangeable core option. Either one keeps the outside lever locked permanently, entry by key only, with free egress inside.
10) Can a Baldwin 6301 mortise lock body replace a Corbin Russwin ML2051?
Not in the same door prep. The Baldwin 6301 is an Entry/Apartment mortise lock body on a 2-1/2 inch backset, while the ML2051 uses a 2-3/4 inch backset. A different backset means the cross bore and the mortise pocket sit at a different distance from the door edge, so swapping one for the other means a new prep or a new door. The Baldwin 6301 is offered knob by knob and, as the 6301LS, lever by lever, both for doors 1-3/4 inch and over. Confirm the existing prep's backset before treating either as a replacement for the other.
11) The door needs to be released from a card reader or access control panel. Does the ML2051 do that?
No, the ML2051 is a mechanical lockset with no electrified option in its standard build. For an opening tied into access control, the Schlage L9092EU 03A is a heavy duty electric lock/unlock outside lever mortise lock for 1-3/4 inch doors with a keyed outside and request to exit, running 12 or 24 VDC. The Command Access ML190 is a heavy-duty motorized mortise lock with field selectable fail safe or fail secure operation on 24 VDC in a storeroom function, and the BEST 45HW is a wired electromechanical mortise lock running 12V or 24V. Pick fail safe or fail secure based on whether the opening is on an egress or a security path.
12) What mortise lock should be used instead of the ML2051 on a behavioral health or patient room door?
Move to an anti-ligature body. The TownSteel MRX-L-01 is a Grade 1 heavy duty stainless steel anti-ligature lever mortise lockset in a passage function for 1-3/4 inch doors, and the MRX-A-01 is the same passage function in satin stainless steel with ligature resistant arch trim. Marks USA 5PDN is a Grade 1 hospital passage mortise push/pull paddleset, ligature resistant and ADA compliant in satin stainless steel. The ML2051 lock body itself is offered with Behavioral Health BHSS and BLSS trim designs if the opening still needs the keyed entrance/office function rather than passage.
13) Will an ML2051 fit an aluminum storefront or narrow stile door the way an Adams Rite style lock does?
No. The ML2051 is built for a 1-3/4 inch wood or hollow metal door with a heavy-gauge steel case measuring 5-7/8 by 4 by 15/16 inches, which a narrow aluminum stile will not accept. For those openings, the Alarm Lock DL1300NW is a Trilogy Networx wireless electronic mortise lock with keypad made for Adams Rite deadlatches, the Dormakaba E-Plex 2066 is a wide stile electronic pushbutton keyless mortise lock, and the Kaba Ilco BR Series is a glass door bottom rail lock. Measure the stile width before ordering any mortise body.
14) Is the Schlage LE Series mortise lock rated the same as the ML2051?
They sit at different grades. The Schlage LEBMB-ADD is a Grade 2 mobile-enabled mortise lock with push button and LED for 1-3/4 inch doors, carrying a 3 hour fire rating and covering privacy, office and apartment modes. The ML2051 is ANSI/BHMA Grade 1 for both operational and security at ANSI function F04. If the specification calls for Grade 1 mortise hardware, the LEBMB-ADD does not meet it; the Schlage LEMD-GRW ENGAGE wireless mortise lock is the Grade 1 electronic option with a 3 hour fire rating.
15) Does the ML2051 need Corbin Russwin cylinders, or can another manufacturer's keyway be used?
The ML2051 ships standard with a brass conventional 6-pin cylinder in the L4 keyway, 0-bitted, and it works with new or existing Corbin Russwin key systems while also accepting most other manufacturers' cylinders. It can also be ordered less cylinder, or as CL6 or CL7 for a 6-pin or 7-pin large format interchangeable core supplied separately. That matters when comparing against a lock like the Cal-Royal NM8080, a Grade 1 storeroom mortise lockset offered with an interchangeable core option, or the BEST 45HZ EZ Series keypad mortise lock with key override. A building already keyed on one system can usually keep it and change only the lock body.
16) What mortise lock handles a lockdown from inside the classroom, which the ML2051 does not?
An intruder function. The BEST 45HCA with intruder function is a heavy duty mortise lockbody that locks the outside lever from inside the room, and the TownSteel FME-4000 is a Grade 1 heavy duty electronic intruder classroom mortise lockset with RFID for 1-3/4 inch doors. The ML2051 locks the outside grip by a toggle action stop inside the lock case, which is an office function rather than a lockdown feature, and its inside grip is always free for egress. Any door written into a lockdown plan should be specified on an intruder or classroom security function.
17) I'm ordering several ML2051 locks for one suite. Can they all take the same key?
Yes. Keying is a required choice on the ML2051: keyed different (KD) is standard, and keyed alike (KA) groups multiple locks to one key, which is what you want for a tenant suite or a set of offices one person opens. There's also a free-text field for special cylinder or keying requirements if the locks need to sit inside a larger master key schedule.
18) How big is the mortise pocket the ML2051 needs?
The ML2051 lock case is heavy-gauge steel at 5-7/8 x 4 x 15/16 inches (149 x 102 x 24mm), with an 8 x 1-1/4 inch armored front in wrought brass, bronze, or stainless. Center to center, the lever to cylinder spacing is 3-5/8 inches (92mm) and lever to thumbturn is 2-7/16 inches (62mm). Those spacings are what decide whether an existing door's face prep lines up, so check them against the holes already in the door before you cut anything new.
19) Does the ML2051 have a deadbolt, and do I need a separate deadbolt above it?
The ML2051 lock body carries a one-piece stainless steel deadbolt, 19/32 x 1-1/4 inches with a full 1 inch throw, in the same case as the latchbolt. That's the point of a mortise lock over a cylindrical one: security and life safety come out of a single door prep, so you don't cut a second hole for an auxiliary deadbolt. The latchbolt is a two-piece mechanical bolt with an anti-friction insert, which takes less force to close the door against a closer.
20) What trim do I have to pick when ordering an ML2051, and does the rose size matter?
Three trim choices are made at the order. Lever design: Armstrong, Citation, Dirke, Essex, Lustra, Lustra Wrought, 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 and N escutcheon plates. Finish: fourteen options from 605 bright brass through 626 satin chrome, 630 satin stainless, and BSP black suede powder coat. Rose size matters on retrofits, since the larger F rose covers more of the door face and hides marks or old prep the 2-1/4 inch A rose would leave showing.
21) What's a cheaper Grade 1 entrance/office mortise lockset than the Corbin Russwin ML2051?
The Cal-Royal NM8050 is the closest straight equivalent we carry: Grade 1, entrance/office function, 1-3/4 inch door, with an auxiliary deadlatch, same as the ML2051. Where the ML2051 pulls ahead is the key system, it works in new or existing Corbin Russwin systems and accepts most other makers' cylinders, plus the field-reversible latchbolt and the trim range. If you're matching a building already on Corbin Russwin keys, stay with the ML2051. If it's a standalone door with no keying to match, the NM8050 covers the same function.
22) Can I get the ML2051 with a keypad or card reader instead of a key?
No. The ML2051 is a mechanical, non-electronic lockset, keyed only. If the opening needs credentials or audit trail in a mortise case, look at the Dormakaba E-Plex E5086 pushbutton and card mortise lock, the Schlage LEMD-GRW ENGAGE wireless mortise lock with a 125kHz proximity reader, or the TownSteel FME-2000 Grade 1 RFID mortise lockset. For electric latch retraction on a Corbin Russwin body specifically, motorized electric latch retraction is offered on the ML20900 series rather than on the ML2051.
23) My doors are 1-5/8 to 1-7/8 inch. Will the ML2051 work?
Not as standard. The ML2051 is built around 1-3/4 inch doors, with other thicknesses available as a factory option rather than a field adjustment, so a mixed-thickness fleet needs the thickness called out per door at the order. Some electronic mortise locks cover a range natively, for instance the Alarm Lock DL2700CR and DL3500CR Trilogy locks list 1-5/8 to 1-7/8 inch, but those are keypad classroom locks, not a mechanical entrance/office lock.
24) Is there a simpler mortise lock than the ML2051 for a door that does not need to lock?
Yes. The ML2051 is a keyed single cylinder lock, so if the opening only needs a latch, a passage or office non-keyed body costs less hardware and no keying work. The Falcon MA101 is a Grade 1 heavy duty mortise passage lock with field reversible operation and a fire rating, the Schlage PM010 is a Grade 1 non-keyed passage latch mortise lock for 1-3/4 inch doors, and the Hager 3810S is a passage mortise lock with a 2-3/4 inch backset for 1-3/4 to 2-1/2 inch doors. For an office door that needs a lever but no key, the Hager 3850E is an office mortise lock with lever and escutcheon, non-keyed, at a 2-3/4 inch backset.
25) What electronic mortise lock covers the same opening as an ML2051 if access needs to be managed by code or credential?
Several, depending on how the credential is issued. The ML2051 is a mechanical lock, keyed with a conventional 6-pin L4 keyway cylinder. For keypad entry, the Alarm Lock DL3500CR is a Grade 1 Trilogy electronic mortise lock holding 300 user codes, and the BEST 45HZ EZ Series is an electronic keypad mortise lock with key override. For credentials, the TownSteel FME-2000 is a Grade 1 heavy duty mortise lockset with RFID, and the Schlage LEMD-GRW is a Grade 1 ENGAGE wireless mortise lock with a 125 kHz proximity reader and a 3 hour fire rating. Note the Alarm Lock bodies are built for 1-5/8 to 1-7/8 inch doors while the ML2051 and the TownSteel FME-2000 are 1-3/4 inch.
26) What looks like an ML2051 substitute but is not a working lock?
Dummy trim. The Emtek 3019 Brisbane, 3102 Memphis, 3104 Hamilton, and 3106 Manhattan are all catalogued as mortise entrance locksets, but each carries a dummy function, meaning fixed trim with no latch and no key. The Schlage L0170 is likewise a Grade 1 mortise non-keyed lever lock in half dummy trim for 1-3/4 inch doors. The ML2051 is a keyed lockset with a 3/4 inch latchbolt and a stainless steel deadbolt. If the part number says dummy, it is decorative trim for an inactive leaf, not a replacement for a working entrance lock.
27) Is a Sargent 4874 mortise deadbolt an alternative to the ML2051?
They do different jobs. 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 mortise lock with a deadbolt function and no handing. Both are deadbolt-only bodies with no latchbolt and no lever, so the door has to be pushed or pulled and secured separately. The ML2051 combines a latchbolt operated by grip or key with a 1 inch throw stainless steel deadbolt in one lock case and a single door prep. Use a deadbolt body where an existing latch is already in the door, not where the opening needs latching and locking together.
28) Is the ML2051 the right lock for a dorm or corridor door where the room must be secured on exit?
A dormitory exit function fits that pattern better. 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 so the occupant throws the deadbolt on the way out. The ML2051 uses the entrance/office pattern, where the outside grip is locked by a toggle action stop and the latchbolt retracts by key. Both are keyed single cylinder mortise locks, so the difference to weigh is whether the occupant locks the door with a thumbturn on exit or with a toggle inside the lock case.
29) Can a BEST 45H mortise lock body be swapped in for an ML2051?
They are comparable heavy duty bodies but not the same function. The BEST 45HCA is a heavy duty mortise lock body in a public entrance function with field reversible operation, and the 45HCAINL is a heavy duty mortise lockbody with an intruder function for lockdown from inside the room. The ML2051 is a Grade 1 entrance/office body that is also field reversible, using the patented quick reversible latchbolt that re-hands without opening the lock case. Match the ANSI function first: a public entrance body will not reproduce the toggle-stop office behavior, and an intruder body adds inside locking the ML2051 does not have.
30) What replaces the ML2051 on a restroom or bedroom door that needs privacy rather than a key?
A privacy function with a thumbturn inside. The Cal-Royal NM8440 is a Grade 1 privacy mortise lockset with deadbolt for 1-3/4 inch doors, and the Hager 3840S is a Grade 1 privacy mortise lock on a 2-3/4 inch backset for 1-3/4 to 2 inch doors. Both lock from the occupied side without a key. The ML2051 is a keyed single cylinder lock with the outside grip controlled by a toggle stop, which is the wrong pattern for a restroom because the outside stays keyed and the occupant has no direct inside lock.
31) Which comparable mortise locks hold the same Grade 1 rating as the Corbin Russwin ML2051 for a facility standardizing on Grade 1?
Within the mortise field, the Grade 1 peers are the Accentra 8805FL in storeroom function, the Cal-Royal NM8050 entrance/office, NM8070 classroom, NM8080 storeroom and NM8440 privacy, the Falcon MA101 passage, the Schlage PM010 passage latch, the TownSteel FME-2000 and FME-4000 classroom locksets, the TownSteel MRX-A-01 and MRX-L-01 passage bodies, the Sargent 7925 dormitory exit, and the Marks USA LA318GJ classroom. The ML2051 is Grade 1 per ANSI/BHMA A156.13 Series 1000, operational and security, at ANSI function F04. Standardizing a facility means matching the grade across every function on the schedule, not just the entrance doors.
32) Can a Sargent 130KB thumbturn be ordered as a replacement part for a Corbin Russwin ML2051?
No. The Sargent 130KB is a standard duty mortise thumbturn from the 8200 Series and the 130W is a mortise thumbturn with a round backplate from the 7800 Series. Both are trim pieces for their own lock bodies, not a Corbin Russwin part. The ML2051 takes ML2000 Series trim, which is sold as lever designs including Armstrong, Citation, Essex, Lustra, Newport, Princeton and Regis, on A rose, F rose, M escutcheon or N escutcheon. Spacing on the ML2051 is 2-7/16 inches center to center from knob or lever to thumbturn, so trim from another series will not line up with the prep.
33) For a hotel guest room, is the ML2051 the right lock or should an RFID lock be used?
It depends on whether the property reissues credentials between stays. The ML2051 is a mechanical keyed lock using a conventional 6-pin L4 keyway cylinder, so a rekey is a physical job. The Dormakaba Saffire LX-I-M002 is an electronic RFID mortise lockset with BLE mobile access at BHMA Grade 2, and the Dormakaba PowerPlex P2066 is a mortise lock from the PowerPlex 2000 Series. The E-Plex E5086 is a Grade 1 entry/egress electronic pushbutton and card mortise lock in a back to back configuration. Guest rooms with turnover generally take a credential lock; back of house and offices are where the keyed ML2051 stays.
34) Is a Codelocks CL2255 an alternative to the ML2051 for a light-use interior office door?
Only if the traffic is light. The Codelocks CL2255 is a medium duty electronic tubular mortise latch from the CL2000 Series in a brushed steel finish, and it needs no keys or wiring. The ML2051 is a Grade 1 commercial lock with a heavy-gauge steel case, UL cycle tested to 14.5 million cycles under verification ID V875753, and rated for commercial use. On a low-traffic interior office where the goal is code entry without a key system, the CL2255 does the job; on a main entrance or a door cycled all day, the Grade 1 body is the one that survives.
35) How many cycles is the Corbin Russwin ML2000 Series mortise lock tested to?
14.5 million cycles under UL cycle testing, verification ID V875753. Put in context, that is well past the ANSI/BHMA A156.13 Grade 1 threshold, which is why the ML2051 turns up on hospital corridors, school entrances, and hotel back-of-house doors that get hit thousands of times a week. For an MRO buyer standardizing a facility, that cycle number is the argument for spending mortise money instead of cylindrical money.
36) Is there a vandal resistant or behavioral health version of the ML2000 mortise lock?
Both exist in the family. The ML2000VR vandal resistant option uses stainless steel escutcheons with tapered edges and Torx pin tamper-resistant screws for doors that take abuse. For behavioral health openings, the series offers BHSS and BLSS trim. Trim designs also include Museo and Vineyard, and status indicator options showing locked or unlocked are available on sectional and escutcheon trim, which is what a school or clinic usually wants on a door staff need to read at a glance. If you need a fully ligature resistant lockset instead, the TownSteel MRX-L-01 is a Grade 1 anti-ligature lever mortise lockset, though it's passage function.
37) What is the ML2051 lockset made of, and which finish holds up in a high-traffic entrance?
Trim substrate is brass or bronze, with the lock case in heavy-gauge steel and the armored front in wrought brass, bronze, or stainless steel. Across the fourteen finishes, the satin options take handling better than the bright ones on a door that sees hundreds of hands a day: 626 satin chrome and 630 satin stainless are the two that dominate commercial and institutional specs, while 605 bright brass and 625 bright chrome show fingerprints and wear patterns faster. 613 satin bronze oil-rubbed and BSP black suede powder coat are the choices when the opening is architectural rather than utilitarian.
How fast can I get the Corbin Russwin ML2051-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 ML2051-NSA-626 come with a warranty?
Absolutely. The Corbin Russwin ML2051-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 ML2051-NSA-626?
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