Corbin Russwin ML2057 Grade 1 ...
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Corbin Russwin Corbin Russwin ML2057 Mortise Storeroom Lockset COR-ML2057-KEYED

Corbin Russwin ML2057 Grade 1 Mortise Storeroom Lockset

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Model: ML2057 NSA 626
From the ML2000_Series Collection
$1,566.92
$876.69
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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 ML2057-KEYED Grade 1 Mortise Storeroom Lock with Field-Reversible Latchbolt

Commercial-Grade Mortise Storeroom Security for High-Traffic Applications

The Corbin Russwin ML2057-KEYED is a Grade 1 mortise storeroom lockset from the ML2000 Series, engineered for demanding commercial, institutional, industrial, and government environments. Conforming to ANSI function F07, this lock operates with a latchbolt retracted by grip from inside or by key from outside, while the outside grip remains always rigid and the auxiliary latch automatically deadlocks the latchbolt for enhanced security. Designed for 1-3/4" (44mm) standard door thickness with a field-reversible handing feature, the ML2057 is constructed of heavy-gauge steel with a patented Quick Reversible latchbolt and a 1" stainless steel deadbolt, making it an ideal solution 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

  • Commercial Office Buildings
  • Educational Facilities and Schools
  • Healthcare Institutions and Hospitals
  • Hotel and Hospitality Properties
  • Industrial and Warehouse Facilities
  • Government and Municipal Buildings
  • Multi-Tenant Residential and Institutional Properties

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 high-risk or high-traffic environments where security and durability are paramount.

Why Choose Corbin Russwin Quality?

Corbin Russwin ML2000 Series mortise locks deliver professional-grade reliability with heavy-gauge steel construction and a patented Quick Reversible latchbolt, backed by an extraordinary UL Cycle test result of 14.5 Million Cycles (Verification ID: V875753). The ML2057-KEYED is covered by a 10 Year Limited warranty, underscoring the brand's commitment to long-term performance. Engineered for demanding commercial applications where dependable storeroom security is essential, the ML2000 Series is the trusted choice for offices, schools, hospitals, and government facilities worldwide.

Product Specs

Subcategory:
Mortise Locks
Product Group:
Mechanical Locks
Series:
ML2000 Series
Grade:
Grade 1
Keyed Function:
Single Cylinder
Lock Function Description:
Latchbolt by grip inside or by key outside. Outside grip always rigid. Auxiliary latch deadlocks latchbolt.
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:
F07
Product Subgroup:
Mortise Locks and Trim
Product Type:
Mortise Locks
Keyed:
Yes
Commercial/Residential:
Commercial
Lock Type:
Mortise
Lock Function:
Storeroom/Closet
Segment:
Door Hardware
Product Attribute:
Mortise Locks
Electronic:
No
Tags:
ml2057 lwa, ml2057 corbin russwin, corbin ml2057
Product Model:
ML2057
Collection:
ML2000_Series
Product Function:
Storeroom
Door Hand Direction:
Field Reversible
Door Thickness Range:
1-3/4"
Product Category:
Mechanical Locks
Product Substrate:
Brass or Bronze
Department:
Door Hardware

Parts & Accessories

    Corbin Russwin ML2057 NSA 626 – Frequently Asked Questions

    1) Will the Corbin Russwin ML2057 storeroom lock fit a 1-3/4 inch commercial door?
    Yes. The ML2057 mortise storeroom lock is built for 1-3/4 inch (44mm) door thickness as standard, which is the usual commercial door. It uses a 2-3/4 inch (70mm) backset and drops into a standard ANSI mortise pocket, with a heavy-gauge steel lockcase measuring 5-7/8 x 4 x 15/16 inches. Optional thicknesses are available if your doors are heavier than standard.
    2) What does the storeroom function on the ML2057 actually do when someone closes the door behind them?
    Storeroom function means the outside lever or knob is always rigid, so the door is locked to the outside at all times, no exceptions. Entry from outside is by key only. From inside, the grip always retracts the latchbolt for free egress. An auxiliary latch deadlocks the latchbolt when the door closes so it cannot be carded or shimmed. That is ANSI function F07, and it is the right choice for supply rooms, mechanical rooms, IT closets, and any opening you never want left unlocked by accident.
    3) Do I have to order the ML2057 handed, or can I re-hand it in the field?
    Order it and re-hand it on site. The ML2057 uses a patented Quick Reversible latchbolt, so the handing is reversed without opening the lock case. That is the difference that matters on a retrofit day: one lock body covers left and right hand openings, so you can carry fewer part numbers on the truck and not lose a trip to a mis-handed door.
    4) Will the ML2057 latch into the strike that is already in my frame?
    It 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 (19mm) two-piece anti-friction latchbolt plus a 9/16 inch auxiliary deadlocking latch. If your frame already has a standard ANSI 4-7/8 inch strike prep from another mortise lock, the new lock lands in it. If the frame carries a smaller T-strike or a non-ANSI prep, plan on frame work or a filler, because the 4-7/8 inch cutout is taller.
    5) Can I put my existing keys or interchangeable cores in the Corbin Russwin ML2057?
    Four cylinder choices cover it. Standard is a conventional 6-pin brass cylinder in the L4 keyway, 0-bitted. Order LC (less cylinder) if you are supplying your own, or CL6 / CL7 if you run large format interchangeable cores in 6-pin or 7-pin and want the lock prepped less core. It works on new or existing Corbin Russwin key systems and accepts most other manufacturers' cylinders. Keying is specified at order: KD keyed different, or KA keyed alike when a group of doors needs to share one key.
    6) Is the ML2057 mortise lock fire rated for a 90 minute or 3 hour opening?
    UL and cUL listed, tested to UL10C positive pressure, and rated for a 3 hour fire door up to 4 by 10 feet single or 8 by 10 feet 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. For a spec writer that covers the usual stack on a fire rated corridor or stair opening.
    7) I need the storeroom door to unlock on a card read or a schedule. Is the ML2057 the wrong lock?
    Yes, for that job it is. The ML2057 is a fully mechanical lock with no electrical option in this configuration. If you need access control at the opening, look at the Dormakaba E-Plex E5086 Grade 1 pushbutton and card mortise lock, the Accentra nexTouch NTM623-NR with a capacitive touchscreen keypad and cylinder override, or the TownSteel FME-2000 Series Grade 1 RFID mortise lockset for a 1-3/4 inch door. For a mechanical lock you want released remotely, the Command Access ML190 Series is a motorized mortise lock with field selectable EL/EU operation on 24VDC.
    8) What is the closest cross-brand equivalent to a Corbin Russwin ML2057 mortise storeroom lock?
    The ML2057 is a Grade 1 mortise lock in storeroom function, and the two peers that match on both counts are the Accentra 8805FL Grade 1 storeroom mortise lock from the 8800 Series and the Cal-Royal NM8080 Grade 1 storeroom mortise lockset, which is rated for a 1-3/4 inch door and offers an interchangeable core option. All three keep the same basic behavior on the opening: a keyed outside trim over a storeroom-function mortise body. Where they differ is the key system and the trim catalogue behind them - the ML2057 uses a conventional 6-pin L4 keyway cylinder as standard and is offered in ten lever styles including Armstrong, Citation and Newport, so if the building is already on Corbin Russwin keys the ML2057 stays in system while the 8805FL and NM8080 bring their own.
    9) The opening needs classroom function, not storeroom - what mortise lock should be used instead of the ML2057?
    The ML2057 is a storeroom lock: the latchbolt retracts by grip inside or by key outside and the outside grip is always rigid, so there is no way to leave the outside lever free for a class period. For a classroom opening the mechanical peer is the Cal-Royal NM8070 Grade 1 classroom mortise lockset with auxiliary deadlatch, rated for a 1-3/4 inch door. If the classroom door is being brought onto access control, the TownSteel FME-2000 Series is a Grade 1 heavy duty classroom mortise lockset with RFID, and the FME-4000 Series adds an electronic intruder classroom function - both also for 1-3/4 inch doors. Alarm Lock's DL3500CR is a Grade 1 classroom electronic mortise lock with 300 user codes for doors 1-5/8 to 1-7/8 inch thick.
    10) Can a BEST 45H mortise lock body be swapped in where an ML2057 is specified?
    They are not the same function. The ML2057 is a storeroom lock with the outside grip always rigid and the auxiliary latch deadlocking the latchbolt. The BEST 45H Series heavy duty mortise lock body is public entrance function with field reversible operation, which leaves the outside trim operable when unlocked - a different behavior on a storeroom or supply door. The BEST 45HCA Series heavy duty lockbody is an intruder function body, intended for lockdown rather than everyday storeroom keying. Both BEST parts are also lock bodies, where the ML2057 is sold as a complete lockset with lever and rose or escutcheon trim.
    11) What looks like a substitute for a Corbin Russwin ML2057 but will not work on the same door?
    Several mortise parts read as near matches and are not. The Schlage L0170 is a Grade 1 mortise half dummy trim for a 1-3/4 inch door - trim only, with no latch or cylinder. The Emtek 3102 Memphis, 3104 Hamilton, 3106 Manhattan and 3019 Brisbane mortise entrance locksets are all dummy function as well. The Sargent 130KB and 130W are mortise thumbturns, not locksets. The Sargent 4874 is a double cylinder mortise deadbolt with a 2-3/4 inch backset, which matches the ML2057 backset but provides a deadbolt only, with no latchbolt to keep the door closed. The Kaba Ilco 185 Series is likewise deadbolt function. The ML2057 is a keyed storeroom lockset with a 3/4 inch latchbolt, so any of these leaves the opening short of what the storeroom function does.
    12) The storeroom door needs to release electrically on a card reader or fire alarm - what mortise lock does that job?
    The ML2057 is a mechanical storeroom lock with no electrical operation. The Command Access ML190 Series is a motorized mortise lock in storeroom function, heavy duty, with field selectable electrically locked or electrically unlocked operation on 24VDC - the same storeroom function as the ML2057 with the electrical release added. The Schlage L9092EU with 03A trim is a heavy duty electric lock/unlock outside lever mortise lock, keyed outside, with request to exit on 12 or 24VDC for a 1-3/4 inch door, matching the ML2057's door thickness.
    13) Is a Baldwin 6310 mortise lock body an alternative to the ML2057 on a storeroom door?
    The Baldwin 6310 is an entrance/storeroom function mortise lock body in knob by knob for doors 1-3/8 inch and over, and the 6310190RRLS is the lever by lever version in right hand reverse. Both use a 2-1/2 inch backset. The ML2057 uses a 2-3/4 inch backset, so the door prep and strike location are not interchangeable between them - a 2-1/2 inch backset body will not drop into a pocket cut for the ML2057. The ML2057 is also field reversible, while the 6310190RRLS is supplied handed as right hand reverse.
    14) Which mortise locks will not fit a 1-3/4 inch commercial door where an ML2057 is specified?
    The ML2057 is built for 1-3/4 inch door thickness as standard. Several mortise peers are cut for other doors: the Marks USA 21AC and 22AC ornamental iron mortise locks are for 1 inch doors, and the Alarm Lock Trilogy electronic mortise locks - the DL2700CR, DL3500CR and DL4500DB - all list a 1-5/8 to 1-7/8 inch door thickness range. Peers that do match 1-3/4 inch include the Cal-Royal NM8080 Grade 1 storeroom mortise lockset and the Schlage CO-100 standalone electronic mortise lock.
    15) Is a Grade 2 mortise lock acceptable where the ML2057 is specified?
    The ML2057 is ANSI/BHMA Grade 1 under A156.13 Series 1000 for both operational and security grade. If a specification calls out Grade 1, the Schlage LEBMB-ADD mobile-enabled mortise lock is Grade 2 and the Dormakaba LX-I-M002 Saffire electronic RFID mortise lockset is BHMA Grade 2, so neither meets a Grade 1 line item. The Codelocks CL2255 electronic tubular mortise latch is medium duty. Grade 1 mortise peers in the set include the Accentra 8805FL, the Cal-Royal NM8080, and the Schlage CO-100.
    16) Does the ML2057 fit a narrow stile aluminum storefront door?
    No. The ML2057 is a Grade 1 mortise lockset for a 1-3/4 inch commercial door with a heavy-gauge steel lockcase measuring 5-7/8 inches by 4 inches by 15/16 inch, which needs a full mortise pocket. For aluminum and glass entrances the relevant peers are the Alarm Lock DL1300NW Trilogy Networx wireless electronic mortise lock built for Adams Rite deadlatches, the Dormakaba E-Plex 2066, a wide stile electronic pushbutton keyless mortise lock, and the Kaba Ilco BR Series glass door bottom rail lock.
    17) What do I need to specify when ordering an ML2057 besides the function?
    Three trim decisions plus keying. Pick a lever from Armstrong, Citation, Dirke (specified left or right hand), Essex, Lustra cast or Lustra wrought, Newport, Princeton, or Regis. Pick the rose or escutcheon: A rose at 2-1/4 inch diameter, F rose at 2-7/8 inch, M escutcheon, or N escutcheon. Pick a finish from fourteen, including 626 satin chrome, 630 satin stainless, 613 oil-rubbed bronze, and BSP black suede powder coat. Then the cylinder type and KD or KA keying. Note that Dirke is the one lever that is handed on the order rather than field reversible like the lock body.
    18) Should I use a mortise storeroom lock or a cylindrical lock on a high traffic back-of-house door?
    Go mortise where the door gets hit all day. The ML2057 lock case is heavy-gauge steel, sits inside a machined pocket in the door edge rather than a bored hole, and carries a UL cycle verification of 14.5 million cycles. It also brings a 1 inch stainless deadbolt in the same case alongside the latch. A cylindrical lock such as the Schlage PC Series is quicker to install and cheaper to prep, but it is a bored-hole product and it does not give you a deadbolt in the same body. Mortise is the choice for stockrooms, mechanical spaces, and school and hospital corridors that see constant use.
    19) What are the alternatives to the Corbin Russwin ML2057 if I need a Grade 1 storeroom mortise lock?
    Two direct mechanical equivalents to look at. The Accentra 8805FL from the 8800 Series is a Grade 1 storeroom mortise lock with the Arcadia lever. The Cal-Royal NM8080 is a Grade 1 storeroom mortise lockset rated for a 1-3/4 inch door with an interchangeable core option. Both cover the same always-locked-outside application. Where the ML2057 differs is the field reversible latchbolt and the fourteen finish range including the less common bright bronze and black suede powder coat.
    20) Can I standardize a whole building on the ML2000 Series and still get different lock functions on each door?
    That is the point of the series. Twelve functions are configurable from a single ML2054 lock body, so a facility can run storeroom on the supply rooms, and other functions elsewhere, off common trim and a common key system. The ML2057 is the storeroom configuration. Trim, finish, and keying carry across the openings, which keeps the parts room small and lets a maintenance tech swap a lever or a rose without a different part number for every door.
    21) Does the ML2057 come with a deadbolt, and how far does it throw?
    Yes. Alongside the latch, the case carries a one-piece stainless steel deadbolt measuring 19/32 x 1-1/4 inches with a 1 inch throw. The armored front is wrought brass, bronze, or stainless at 8 x 1-1/4 inches. Center to center spacing is 3-5/8 inches (92mm) from knob or lever to cylinder, and 2-7/16 inches (62mm) from knob or lever to thumbturn, which is what you check against an existing door prep before you commit to a retrofit.
    22) Does the ML2057 mortise lock work on a restroom or bedroom door, or is a different function needed?
    The ML2057 is keyed on the outside with a single cylinder and storeroom function, so it is not the part for a room that needs to be locked from inside without a key. For privacy openings the peers are the Cal-Royal NM8440 Grade 1 privacy mortise lockset with deadbolt for a 1-3/4 inch door and the Hager 3840S Grade 1 privacy mortise lock with a 2-3/4 inch backset for doors 1-3/4 to 2 inch thick. The Hager shares the ML2057's 2-3/4 inch backset, so the door prep carries over.
    23) If the door does not need to be keyed, is there a simpler mortise lock than the ML2057?
    Yes. The ML2057 carries a cylinder and is keyed, which is the reason for the storeroom function in the first place. On a corridor, hall or closet door that only needs latching, the Schlage PM010 is a Grade 1 non-keyed passage latch mortise lock for a 1-3/4 inch door, and the Falcon MA101 is a Grade 1 heavy duty mortise passage lock with field reversible operation and a fire rating. Hager's 3810S and 3810E are Grade 1 passage mortise locks with a 2-3/4 inch backset for doors 1-3/4 to 2-1/2 inch thick, the 3810S with a rose and the 3810E with an escutcheon - the same rose-versus-escutcheon choice the ML2057 offers across its A rose, F rose, M escutcheon and N escutcheon trims. For a non-keyed office door, the Hager 3850E is a Grade 1 office mortise lock with lever and escutcheon.
    24) For a behavioral health or ligature-resistant opening, what mortise lock is used instead of a standard lever lockset?
    The ML2057 is offered with Behavioral Health BHSS and BLSS trim within its trim range, but where a fully ligature resistant assembly is required the dedicated peers are the TownSteel MRX-L-01, a Grade 1 heavy duty anti-ligature lever mortise lockset in stainless steel, passage function, for a 1-3/4 inch door, and the TownSteel MRX-A-01, the same passage function with satin stainless steel ligature resistant arch trim. The Marks USA 5PDN is a Grade 1 hospital passage mortise push/pull paddleset, ligature resistant and ADA compliant in satin stainless steel. All three are passage function, so they do not key the opening the way the ML2057 storeroom function does.
    25) The door is an office or entrance rather than a storeroom - which mortise lock suits that better than an ML2057?
    On the ML2057 the outside grip is always rigid and only a key retracts the latchbolt from outside, which is right for a supply or equipment room but wrong for an office door that gets left unlocked during business hours. The Cal-Royal NM8050 is a Grade 1 heavy duty office/entrance mortise lockset with auxiliary deadlatch for a 1-3/4 inch door, matching the ML2057's door thickness. Baldwin's 6301 is an entrance/apartment mortise lock body for doors 1-3/4 inch and over, available knob by knob or as the 6301LS lever by lever, both on a 2-1/2 inch backset rather than the ML2057's 2-3/4 inch. For a dormitory or corridor door, the Sargent 7925 is a Grade 1 heavy duty dormitory exit function mortise lock with rose trim and a single cylinder deadbolt.
    26) Can a cylindrical lock be used instead of the ML2057 mortise lock?
    Only if the door is prepped for it. The ML2057 is a mortise lock and drops into a lock pocket cut in the door edge with a 2-3/4 inch backset and an 8 inch by 1-1/4 inch armored front. The Schlage PC10 Grade 1 passage cylindrical lock for a 1-3/4 inch door uses a bored cylindrical prep instead, which is a different hole pattern entirely - it is not a swap into a mortised door, and it is passage rather than keyed storeroom function.
    27) Which finish of the ML2057 holds up best in a school or hospital corridor?
    For institutional traffic the two workhorses are 630 satin stainless steel and 626 satin chrome, both of which hide handling marks and match most existing commercial door hardware. Fourteen finishes are offered in total, running through bright and satin brass, bright and satin bronze, oil-rubbed bronze including 613 and 613E, bright and satin nickel, bright chrome, bright stainless, black oxidized bronze, and BSP black suede powder coat if you are matching a darker architectural package. Base material is brass or bronze.
    How fast can I get the Corbin Russwin ML2057 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 ML2057 NSA 626 come with a warranty?
    Absolutely. The Corbin Russwin ML2057 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 ML2057 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 ML2057 NSA 626 from ZenSupply?
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