Corbin Russwin ML2059 Grade 1 ...
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$1,525.00
$963.27
Corbin Russwin Corbin Russwin ML2059 Mortise Security Storeroom or Closet Lockset COR-ML2059-KEYED

Corbin Russwin ML2059 Grade 1 Mortise Security Storeroom or Closet Lockset

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Model: COR-ML2059-NSA-626
From the ML2000_Series Collection
$1,525.00
$963.27
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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

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

$1,525.00
$963.27
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Corbin Russwin ML2059-KEYED ML2000 Series Grade 1 Mortise Security Storeroom Lockset with Deadbolt

Commercial-Grade Mortise Security Storeroom and Closet Lock with Integrated Deadbolt Protection

The Corbin Russwin ML2059-KEYED is a Grade 1 mortise security storeroom and closet lockset from the ML2000 Series, engineered for high-traffic commercial, institutional, industrial, and government applications. This lockset features simultaneous latchbolt and deadbolt retraction by inside grip or by key outside, with the outside grip always rigid for maximum security. Constructed of heavy-gauge steel with a 1" stainless steel deadbolt and a patented Quick Reversible latchbolt, it is designed for 1-3/4" (44mm) standard door thickness and is field reversible for flexible installation. The ML2059 has been UL cycle tested above and beyond requirements, completing 14.5 Million Cycles (Verification ID: V875753), making it an exceptional choice for offices, schools, hospitals, hotels, and other demanding high-use environments.

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 and Storerooms
  • Educational Facilities and School Closets
  • Healthcare Institutions and Supply Rooms
  • Hotels and Hospitality Properties
  • Industrial and Warehouse Facilities
  • Government and Municipal Buildings
  • Multi-Tenant Residential and Mixed-Use Properties

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, UL cycle tested to an exceptional 14.5 Million Cycles (Verification ID: V875753) — far exceeding standard requirements. Backed by a 10 Year Limited warranty and Grade 1 certification, the ML2059 is engineered for the most demanding commercial, institutional, and government applications where dependable security 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, 1" Deadbolt
Standard Strike:
ANSI straight lip standard, 4-7/8" x 1-1/4" x 1-1/8"
Warranty:
10 Year Limited
Product Subgroup:
Mortise Locks and Trim
Product Type:
Mortise Locks
Keyed:
Yes
Commercial/Residential:
Commercial
Function Description:
Latchbolt and deadbolt by grip inside or by key outside. Inside grip simultaneously retracts deadbolt & latchbolt. Outside grip always rigid. Auxiliary latch deadlocks latchbolt.
Lock Type:
Mortise
Lock Function:
Security Storeroom/Closet
Product Attribute:
Mortise Locks
Electronic:
No
Product Model:
ML2059
Collection:
ML2000_Series
Product Function:
Security Storeroom/Closet
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-ML2059-NSA-626 – Frequently Asked Questions

1) How does the ML2059 security storeroom function actually operate on the door?
Outside is always locked: the outside grip stays rigid at all times and the key retracts both the latchbolt and the deadbolt. From inside, the grip simultaneously pulls back the deadbolt and latchbolt in one motion, so egress is a single action. An auxiliary latch deadlocks the latchbolt against carding. That makes it a storeroom or closet lock where you want deadbolt security but no chance of someone leaving the outside unlocked.
2) Will the Corbin Russwin ML2059 fit a 1-3/4 inch commercial door?
Yes, 1-3/4 inch (44mm) is the standard door thickness for the ML2059, with a 2-3/4 inch backset. Thicker doors are handled with optional thickness kits rather than the standard build, so specify the thickness when the opening is not a standard 1-3/4 inch leaf.
3) Do I need to order the ML2059 handed, or can it be reversed in the field?
You can reverse it on site. The ML2059 uses a patented Quick Reversible latchbolt, so the handing is changed without taking the lock case apart. Note that two lever styles are handed selections in their own right: the Dirke (DS) lever comes as a left hand or right hand part, so get that one right on the order.
4) Will the ML2059 latch into the strike prep already in my frame?
It ships with an ANSI straight lip strike measuring 4-7/8 x 1-1/4 inches with a 1-1/8 inch lip to center, which is the standard commercial frame prep. The latchbolt has a 3/4 inch throw with a 9/16 inch effective auxiliary latch, and the deadbolt throws 1 inch, so the frame needs a deadbolt pocket behind the strike as well as the latch cavity. If your existing frame is prepped for a latch-only mortise lock, the deadbolt hole has to be added.
5) Can I put the ML2059 on a 3-hour fire rated door?
Yes. The ML2059 is UL and cUL listed to UL10C positive pressure and carries a 3-hour rating on single doors up to 4 by 10 feet and pairs up to 8 by 10 feet. It is also ANSI/BHMA A156.13 Series 1000 Operational and Security Grade 1, ADA A117.1, California State Fire Marshal, and windstorm/hurricane certified.
6) Can I key the ML2059 into my existing master key system?
It works with new or existing Corbin Russwin key systems and will accept most other manufacturers' cylinders. Standard build is a brass conventional 6-pin L4 keyway cylinder, 0-bitted. If you are keying it into someone else's system, order it LC (less cylinder), or CL6 / CL7 if you run large format interchangeable cores and will supply your own 6-pin or 7-pin core. Keyed different is standard; keyed alike is available when several closets should share one key.
7) What is the closest Grade 1 storeroom mortise lock equivalent to the Corbin Russwin ML2059?
The ML2059 is a Grade 1 mortise lock with a Security Storeroom/Closet function, meaning the outside grip stays rigid and the key retracts both latchbolt and deadbolt. Two Grade 1 storeroom-function mortise locksets sit closest to it: the Accentra 8805FL Grade 1 storeroom mortise lock with Arcadia lever, and the Cal-Royal NM8080 heavy duty Grade 1 storeroom mortise lockset, which offers an interchangeable core option. The ML2059 differs in that it carries an integral deadbolt alongside the latch; the 8805FL and NM8080 are catalogued as storeroom function without a stated deadbolt.
8) I need a mortise lock for a classroom rather than a storeroom - what should I use instead of the ML2059?
The ML2059 is a Security Storeroom/Closet function lock, so the outside lever is always rigid and entry is by key only - that is wrong for a classroom where staff need to lock the outside lever from the corridor. For classroom openings, the Cal-Royal NM8070 is a Grade 1 classroom mortise lockset for 1-3/4 inch doors, and the Marks USA LA318GJ is a Grade 1 classroom security indicator mortise lockset with ANSI strike, also for 1-3/4 inch doors. Both carry the same Grade 1 rating as the ML2059.
9) What looks like a substitute for the ML2059 but will not work on a keyed storeroom door?
Several mortise products share the mortise prep but not the security function. The Falcon MA101 and Schlage PM010 are Grade 1 mortise passage latches, non-keyed, so they provide no locking at all. The Schlage L0170 is a half dummy trim with no latch. The Hager 3810E and 3810S are Grade 1 passage mortise locks on a 2-3/4 inch backset, and the Hager 3840S is a privacy function. The ML2059 is keyed, single cylinder, with a 1 inch deadbolt and rigid outside grip - none of those passage, privacy, or dummy units will hold a storeroom secure.
10) What trim do I have to specify when ordering an ML2059 mortise lock?
Three choices decide the look and the door prep: lever style (Armstrong, Citation, Dirke, Essex, Lustra, Newport, Princeton, Regis), rose or escutcheon (A rose at 2-1/4 inch diameter, F rose at 2-7/8 inch, or M and N escutcheons), and finish. Escutcheon trim covers the cylinder and thumbturn spacing in one plate; with rose trim the cylinder sits 3-5/8 inch center to center from the lever and the thumbturn 2-7/16 inch, so the door face gets separate prep holes.
11) Is the ML2059 heavy duty enough for a high traffic school or hospital storeroom?
The lock case is heavy-gauge steel at 5-7/8 x 4 x 15/16 inches with a one-piece stainless steel deadbolt, and it has been UL cycle tested to 14.5 million cycles (Verification ID V875753), well past the Grade 1 requirement. The latchbolt is a two-piece anti-friction design that needs less force to close, which matters on doors with closers and stack pressure.
12) Is there a keypad or credential version if I want to stop issuing keys for storerooms?
The ML2059 is strictly mechanical, no electronics. For credential or code access on a mortise prep, ZenSupply carries the BEST 45HZ EZ Series electronic keypad mortise lock with key override, the Dormakaba E-Plex 2066 pushbutton keyless mortise lock, and the TownSteel FME-2000 Grade 1 RFID mortise lockset for 1-3/4 inch doors. Those change the credential, not the door prep concept.
13) My doors are 1-5/8 to 1-7/8 inch. Is the ML2059 still the right lock?
Not as standard. The ML2059 is built for 1-3/4 inch doors, with optional thicknesses ordered separately. If you are working a mixed range of 1-5/8 to 1-7/8 inch leaves, the Alarm Lock Trilogy DL3500CR Grade 1 electronic mortise lock covers that span, though it is a classroom function rather than a security storeroom.
14) Is there an electronic or keypad alternative to the ML2059 mortise lock?
The ML2059 is a mechanical, key-operated lockset - it is not electronic. If credentials rather than keys are the goal on the same mortise prep, Grade 1 electronic mortise options include the Alarm Lock DL3500CR Trilogy with 300 user codes in classroom function, the BEST 45HZ EZ Series keypad mortise lock with key override, and the Schlage Electronics LEMD-GRW ENGAGE Series wireless mortise lock with a 125kHz proximity reader. Note these are different functions than the ML2059's storeroom/closet function, so confirm the function matches the opening before substituting.
15) If I only need a deadbolt on the door and not a latch, what replaces the ML2059?
The ML2059 combines a 3/4 inch latchbolt with a 1 inch deadbolt in one mortise case. Where the opening needs deadbolt only, the Sargent 4874 is a double cylinder mortise deadbolt on a 2-3/4 inch backset, matching the ML2059's 2-3/4 inch backset prep, and the Kaba Ilco 185 Series is a no-handing mortise deadbolt. The Sargent 4874 is keyed both sides, while the ML2059 is single cylinder with an inside grip that retracts both bolts at once.
16) What are the Grade 1 alternatives to the ML2059 for an office or entrance door where the outside lever should be unlockable?
The ML2059's outside grip is always rigid, so it is not suited to an office door where occupants want to leave the lever free during business hours. The Cal-Royal NM8050 is a Grade 1 office/entrance mortise lockset with auxiliary deadlatch for 1-3/4 inch doors, and the Hager 3850E is a Grade 1 office mortise lock with lever and escutcheon on a 2-3/4 inch backset, non-keyed. The ML2059's 2-3/4 inch backset and 1-3/4 inch door thickness match the NM8050's door range.
17) What mortise lock should I use instead of the ML2059 on a behavioral health or anti-ligature opening?
The ML2059 accepts Behavioral Health (BHSS/BLSS) trim designs within the ML2000 trim range. If a dedicated ligature-resistant lockset is preferred, the TownSteel MRX-L-01 is a Grade 1 heavy duty anti-ligature lever mortise lockset in stainless steel with passage function, the MRX-A-01 is the same idea with arch trim, and the Marks USA 5PDN is a Grade 1 hospital passage mortise push/pull paddleset that is ligature resistant and ADA compliant. All three are passage function rather than the ML2059's keyed storeroom function.
18) I need electric latch retraction or access control tie-in on a mortise opening - what are the options beside the ML2059?
The ML2059 is a mechanical lockset, though Motorized Electric Latch Retraction is offered on the ML20900 series. For electrified mortise bodies, the Command Access ML190 Series is a heavy-duty motorized mortise lock with field selectable EL/EU operation at 24VDC in storeroom function, the BEST 45HW is a wired electromechanical mortise lock running 12V or 24V, and the Schlage L9092EU with 03A trim is a heavy duty electric lock/unlock outside lever mortise lock, keyed outside, with request-to-exit at 12/24VDC for 1-3/4 inch doors.
19) Is there a dormitory or corridor function mortise lock with a deadbolt similar to the ML2059?
Yes. The Sargent 7925 is a Grade 1 heavy duty corridor/dormitory function mortise lock from the 7900 Series with rose trim and a single cylinder deadbolt. Like the ML2059, it is a keyed single cylinder mortise lock with a deadbolt; the difference is the function - the 7925 is a dormitory exit function, while the ML2059 keeps the outside grip rigid at all times and retracts both bolts by key outside or grip inside.
20) Can I use the BEST 45H mortise lock body in place of the ML2059?
The BEST 45H is a heavy duty mortise lock body in public entrance function with field reversible operation, and the 45HCA is offered in intruder function. Both are lock bodies rather than complete locksets. The ML2059 is a complete keyed storeroom/closet lockset, field reversible, supplied with a conventional 6-pin L4 keyway cylinder and ANSI straight lip strike. If the existing trim is being reused, a body-only part may suit; for a full opening, the ML2059 ships with lever, rose or escutcheon, and cylinder selections.
21) What is the difference between the ML2059 and the Cal-Royal NM8440 privacy mortise lock with deadbolt?
Both are Grade 1 mortise locksets for 1-3/4 inch doors and both include a deadbolt. The NM8440 is privacy/bed/bath function, so the deadbolt is thrown by an inside thumbturn for occupant privacy. The ML2059 is Security Storeroom/Closet function and keyed single cylinder - the key retracts latch and deadbolt from outside, the inside grip retracts both at once, and the outside grip is always rigid. Choose by whether the door needs privacy or keyed security.
22) Which finishes does the Corbin Russwin ML2059 come in for matching the rest of my building?
Fourteen finishes, covering the usual commercial choices and the decorative ones: 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, 630 satin stainless, 722 black oxidized bronze oil-rubbed, and BSP black suede powder coat. For most commercial corridors 626 satin chrome and 630 satin stainless are the ones that match existing hardware.
23) Can I get the ML2059 with a visual indicator showing whether the closet is locked?
Status indicator options are offered on the ML2000 Series for locked/unlocked visibility, available with sectional and escutcheon trim. If your priority is a classroom-security indicator lockset specifically, the Marks USA LA318GJ Grade 1 classroom security indicator mortise lockset ships with an ANSI strike and a steel escutcheon measuring 8-1/2 x 2-3/4 x 7/16 inches for 1-3/4 inch doors.
24) Are the Emtek mortise entrance locksets an alternative to the ML2059?
They serve a different purpose. The Emtek 3019 Brisbane, 3102 Memphis, 3104 Hamilton, and 3106 Manhattan mortise entrance locksets are dummy function - decorative trim with no latching or locking action. The ML2059 is a Grade 1 keyed lockset with a 3/4 inch latchbolt and 1 inch deadbolt for commercial openings. Use the Emtek units only on inactive leaves or closet doors that need no operation.
How fast can I get the Corbin Russwin COR-ML2059-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-ML2059-NSA-626 come with a warranty?
Absolutely. The Corbin Russwin COR-ML2059-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-ML2059-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-ML2059-NSA-626 from ZenSupply?
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