Corbin Russwin ML2057 Grade 1 ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$676.75
$316.50
Corbin Russwin ML2057 Grade 1 LL Storeroom Mortise Lockbody Only — LFIC Prep

Corbin Russwin ML2057 Grade 1 LL Storeroom Mortise Lockbody Only — LFIC Prep

(2 reviews) Write a Review

Model: ML2057-LL-626
From the ML2000_Series Collection
Selected Finish is

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

$676.75
$316.50
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 ML2057-LL Storeroom Mortise Lockbody — LFIC Prep, Grade 1, Field Reversible

Commercial-Grade Storeroom Mortise Lock with Patented Quick Reversible Latchbolt

The Corbin Russwin ML2057-LL is a Grade 1 storeroom mortise lockbody from the ML2000 Series, engineered for demanding commercial, institutional, industrial, and government applications. Designed to ANSI function F07, this lockbody features latchbolt operation by grip inside or by key outside, with the outside grip always rigid and the inside grip always free — providing reliable storeroom and closet security in a single door prep. Built for 1-3/4" (44mm) standard door thickness from heavy-gauge steel, the ML2057-LL includes a patented Quick Reversible latchbolt and a 1" stainless steel deadbolt, and is backed by a 10-year limited warranty. The auxiliary latch deadlocks the latchbolt for added security, and the field-reversible handing eliminates the need for disassembly during installation.

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 — Storeroom and Supply Closet Security
  • Educational Facilities — Classroom and Storage Area Access Control
  • Healthcare Institutions — Medication Storage and Restricted Area Lockdown
  • Hotels and Hospitality Properties — Housekeeping and Service Area Security
  • Industrial and Warehouse Facilities — Tool Room and Parts Storage
  • Government and Municipal Buildings — Secure Storage and Records Rooms
  • Multi-Tenant Residential and Mixed-Use Properties — Common Area Storage Security

Why Choose Corbin Russwin Quality?

Corbin Russwin ML2000 Series mortise locks deliver professional-grade reliability with heavy-gauge steel construction and a 1" stainless steel deadbolt, rated for over 14.5 million cycles in UL testing (Verification ID: V875753) — performance that goes above and beyond standard requirements. Backed by a 10 Year Limited warranty and featuring the patented Quick Reversible latchbolt, the ML2057-LL is engineered for the most demanding commercial, institutional, and government applications where dependable, long-term security performance is essential.

Product Specs

Subcategory:
Mortise Locks
Product Group:
Mechanical Locks
Series:
ML2000 Series
Grade:
Grade 1
Lock Function Description:
Mortise Lockbody Only
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 Lock Bodies
Product Type:
Mortise Lockbody Only
Commercial/Residential:
Commercial
Keyed:
Yes
Keyed Function:
Single Cylinder
Lock Type:
Mortise
Lock Function:
Storeroom/Closet
Segment:
Door Hardware
Product Attribute:
Mortise Locks
Electronic:
No
Tags:
corbin russwin ml2057 nsa626, 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" (44mm) standard only
Product Category:
Mechanical Locks
Product Substrate:
Brass or Bronze
Department:
Door Hardware

Corbin Russwin ML2057-LL-626 – Frequently Asked Questions

1) Will the Corbin Russwin ML2057 mortise lock fit a standard 1-3/4 inch commercial door?
That is exactly what it is built for. The ML2057 is spec'd for 1-3/4 inch (44mm) door thickness with a 2-3/4 inch (70mm) backset, which is the standard commercial mortise backset. The steel lockcase measures 5-7/8 x 4 x 15/16 inches, so the door edge needs a mortise pocket machined to take that case, and the armored front measures 8 x 1-1/4 inches. On a hollow metal or solid core wood door already prepped for a standard ANSI mortise lock, those are the four numbers to check before you order.
2) I'm replacing an old mortise lock in a hollow metal door. Will the ML2057 go into the existing pocket?
Match the prep numbers and it will. The ML2057 lockbody runs a 2-3/4 inch (70mm) backset with a 5-7/8 x 4 x 15/16 inch steel case and an 8 x 1-1/4 inch armored front. The spacing that decides whether the old cutouts line up is center to center lever or knob to cylinder at 3-5/8 inches (92mm), and lever or knob to thumbturn at 2-7/16 inches (62mm). If the door you are pulling the old lock out of carries those same hole centers, the ML2057 case drops in. If the old lock used a different backset or a different cylinder center, the face and spindle holes will not line up and you are into a door repair plate or a new door.
3) What does the storeroom function do on a Corbin Russwin ML2057 mortise lock?
Storeroom function, ANSI F07. The outside grip is always rigid, so the door is locked from the corridor side at all times and the only way in is with a key, which retracts the latchbolt. The inside grip is always free, so anyone inside walks out by turning the lever with no key and no thought. Nobody can leave the door in an unlocked state by mistake, which is why it is the standard choice for supply closets, tool rooms, medication storage, records rooms, and any door that must never be found propped open. If you need staff to be able to lock and unlock the door from the inside, storeroom is the wrong function.
4) Does the Corbin Russwin ML2057 come with levers and a cylinder, or is it just the lock body?
Body only. What you get is the mortise lockcase itself, with the latchbolt, auxiliary latch, deadbolt, and armored front. The trim (levers or knobs, roses or escutcheons) and the cylinder are separate orders, so budget for three line items, not one. Corbin Russwin offers a range of trim designs for the ML2000 Series including Museo, Vineyard, and Behavioral Health (BHSS/BLSS), plus status indicator options on sectional and escutcheon trim, and the thru-bolted trim designs help keep alignment and add security. On the cylinder side, the ML2057 works with new or existing Corbin Russwin key systems and accepts most other manufacturers' cylinders.
5) Do I have to specify the hand when I order a Corbin Russwin ML2057 mortise lock body?
Handing is field reversible, so you are not locked into a hand at the order stage. The ML2057 uses the patented Quick Reversible latchbolt, which means the hand is changed without disassembling the lock case, on the door, at install. For anyone stocking spares across a building, that matters: one lock body covers left and right hand openings, so a maintenance shop keeps a single part on the shelf instead of two.
6) Can I key a Corbin Russwin ML2057 into my existing master key system, or use another brand's cylinder?
Both are on the table. The ML2057 can be used with new or existing Corbin Russwin key systems, so it drops into a facility already keyed in Corbin Russwin without breaking the hierarchy. It also accepts most other manufacturers' cylinders, which is the answer for a building standardized on a different keyway or a restricted system you do not want to abandon for one storeroom door. It is a single cylinder, keyed function: key outside, no key needed on the inside.
7) Will the ML2057 latch into the strike already in my frame?
It depends on the throw and the lip. The ML2057 uses a two-piece anti-friction latchbolt with a 3/4 inch (19mm) throw, backed by a deadlocking auxiliary latch with a 9/16 inch (14mm) effective throw that locks the latchbolt against being carded. The strike it is spec'd to is an ANSI straight lip, 4-7/8 x 1-1/4 inches with 1-1/8 inch lip to center. If your frame already carries an ANSI strike of that size and your gap lets the latch reach 3/4 inch, you are fine. If the existing strike is a smaller T-strike or a deep-lip strike sized to a different lock, replace it with the ANSI strike, because the auxiliary latch has to ride on the strike face, not drop into the pocket, or the deadlocking feature does nothing.
8) Is the Corbin Russwin ML2057 approved for a fire rated door?
Yes, and the ratings are specific. The ML2057 is UL and cUL listed, UL10C positive pressure, good for a 3-hour fire door up to 4 x 10 feet as a single and 8 x 10 feet as a pair. It also carries California State Fire Marshal listing, which is what a specifier in California will ask for by name. Those size limits are the part people miss: an oversized single leaf beyond 4 x 10 falls outside what the lock is listed for.
9) What is the Accentra equivalent of the Corbin Russwin ML2057-LL mortise lock body?
The closest cross-brand counterpart is the Accentra 8800FL Series Grade 1 mortise lock body with field reversible handing. Both are Grade 1 mortise lock bodies whose handing can be changed at the opening rather than by ordering a hand-specific part. The Corbin Russwin ML2057-LL is the ML2000 Series body built to ANSI function F07 storeroom, keyed single cylinder, with the latchbolt retracted by key outside or by grip inside and the outside grip always rigid. Mortise bodies mate to their own manufacturer's trim and spindles, so the deciding factor is usually which brand's levers, escutcheons, and key system the building already runs: the ML2057-LL is the body for a Corbin Russwin ML2000 opening and works with new or existing Corbin Russwin key systems while accepting most other manufacturers' cylinders.
10) Can an Accentra 8800FL body be dropped into a door that already has Corbin Russwin ML2000 trim on it?
Treat those as two separate systems rather than one interchangeable body. The Accentra 8800FL Series is a Grade 1 mortise lock body from Accentra, and the Corbin Russwin ML2057-LL is the Grade 1 mortise body from the ML2000 Series, which is built around Corbin Russwin's own trim designs, thru-bolted for alignment, and its cylinder and key system. If the existing ML2000 lever or escutcheon and the building's Corbin Russwin keying are staying on the door, the ML2057-LL keeps that trim and those keys in service. Changing to the 8800FL body means bringing that manufacturer's matching trim and cylinder to the opening as well, which is a different order than a body-only swap.
11) Is the ML2057 heavy duty enough for a high traffic storeroom in a school or hospital?
It is built to the top commercial tier. The ML2057 is certified to ANSI/BHMA A156.13 Series 1000, Grade 1 for both operational and security performance, which is the grade written into most institutional and government specs. UL cycle testing puts it at 14.5 million cycles (Verification ID V875753), well past the minimum a Grade 1 mortise lock has to clear. The case is heavy gauge steel with a one-piece stainless steel deadbolt. For a medication room, a tool crib, or a housekeeping closet that gets hit hundreds of times a day, this is the class of lock that belongs on the door.
12) Does the Corbin Russwin ML2057 meet ADA requirements for accessible hardware?
The ML2057 lockbody is certified to ADA A117.1. One caveat worth knowing on the job: the accessibility requirement lands on the operable part, so pair the body with lever trim rather than knob trim if the opening has to be usable without tight grasping, pinching, or twisting of the wrist. The lockbody itself does not disqualify you; the trim choice can.
13) Should I use a mortise lock like the ML2057 or a cylindrical lock on a storeroom door?
It comes down to the door prep and how hard the door gets used. The ML2057 needs a mortise pocket machined into the door edge to take a 5-7/8 x 4 x 15/16 inch case, plus an 8 x 1-1/4 inch face cutout, so it is a specified-at-the-door-order decision or a shop job on a retrofit. What you get for that is a heavy gauge steel case with a 3/4 inch anti-friction latchbolt, a deadlocking auxiliary latch, and a stainless deadbolt in one body. A cylindrical lock installs into a 2-1/8 inch cross bore and a small edge bore, which is far quicker in the field, but the case is not mortised into the door edge. If the door is already prepped for a mortise lock, stay mortise. If it is bored, converting to mortise means new doors or a shop prep.
14) What is the alternative to a Corbin Russwin ML2057 if I need a Grade 1 mortise lock body with reversible handing?
The Accentra 8800FL Series mortise lock body is the closest cross-brand equivalent we carry: also a Grade 1 mortise lock body, also field reversible handing, so it solves the same stocking problem of one part covering left and right hand openings. The ML2057 is the one to stay with if the building is already keyed in Corbin Russwin or the spec calls out ML2000 Series trim, since it can be used with existing Corbin Russwin key systems. Check the function you need on either one, because a lock body is bought by function first.
15) The drawing calls for a Grade 1 mortise lock body - do the Corbin Russwin ML2057 and the Accentra 8800FL both satisfy that?
Both carry Grade 1: the Accentra 8800FL Series is a Grade 1 mortise lock body, and the Corbin Russwin ML2057-LL is certified to ANSI/BHMA A156.13 Series 1000 at Operational and Security Grade 1. Where the specification goes further than the grade line, the ML2057-LL is the ANSI F07 storeroom body, UL/cUL listed with UL10C positive pressure for 3-hour fire doors up to 4 ft by 10 ft single or 8 ft by 10 ft pair, and compliant with ADA A117.1 and the California State Fire Marshal. For a facility standardizing storeroom and supply closet openings against a written hardware schedule, match the function and fire rating lines as well as the grade line before treating two Grade 1 bodies as equal on the same door.
16) Do I need to order separate left hand and right hand mortise bodies, or will one part cover both openings?
One part covers both hands with either of these. The Corbin Russwin ML2057-LL is field reversible and uses a patented Quick Reversible latchbolt that is re-handed without disassembling the lock case, and the Accentra 8800FL Series mortise lock body is likewise field reversible. For a property manager or contractor buying across a run of storeroom doors, that means stocking by finish rather than by hand: the ML2057-LL comes in fourteen finishes including 626 satin chrome, 630 satin stainless steel, 613 satin bronze oil-rubbed, and BSP black suede powder coat, and any one of them installs on a left or right hand 1-3/4 inch door.
17) Does the ML2057 storeroom mortise lock body have a deadbolt in the case?
There is a deadbolt in the case: one-piece stainless steel, 19/32 x 1-1/4 inches, with a 1 inch (25mm) throw. Day to day security on a storeroom door comes from the latch side, though. The latchbolt is held by a deadlocking auxiliary latch with a 9/16 inch effective throw, which is what stops the latch being loided with a card, and the outside grip stays rigid so the door is locked whenever it is closed.
18) What finishes does the Corbin Russwin ML2057 mortise lock body come in to match the rest of my building's hardware?
Fourteen finishes, so it can be matched to whatever is already hanging on the other openings: 605 Bright Brass, 606 Satin Brass, 611 Bright Bronze, 612 Satin Bronze, 613 Satin Bronze Oil-Rubbed, 613E Dark Oxidized Satin Bronze Equivalent, 618 Bright Nickel, 619 Satin Nickel, 625 Bright Chrome, 626 Satin Chrome, 629 Bright Stainless Steel, 630 Satin Stainless Steel, 722 Black Oxidized Bronze Oil-Rubbed, and BSP Black Suede Powder Coat. Since this is the lock body, the piece that shows on a closed door is the 8 x 1-1/4 inch armored front on the door edge; the trim you pair with it needs to be ordered in the matching finish. In institutional work 626 satin chrome and 630 satin stainless are the two you will find on most existing commercial openings.
19) Is the Corbin Russwin ML2057 rated for a coastal building with windstorm requirements?
The ML2057 carries Windstorm and Hurricane certification alongside its UL10C positive pressure fire listing and California State Fire Marshal listing, so it can go on openings in a jurisdiction that enforces windborne debris requirements. On those jobs the hardware certification is only one line on the assembly, so confirm the door, frame, and strike in your opening are part of a rated assembly too.
How fast can I get the Corbin Russwin ML2057-LL-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-LL-626 come with a warranty?
Absolutely. The Corbin Russwin ML2057-LL-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-LL-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-LL-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

  • 5
    Corbin Russwin ML2057

    Posted by John on Jul 7th 2025

    Product in stock and delivery time was amazing!

  • 5
    Mortise lock

    Posted by Wayne Masone on Jun 6th 2025

    Great product no issues. the product came in quicker than expected

!