Corbin Russwin ML2059 Grade 1 ...
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$713.21
$284.26
Corbin Russwin Corbin Russwin ML2059 Security Storeroom or Closet - Mortise Lockbody Only COR-ML2059-LL

Corbin Russwin ML2059 Grade 1 Security Storeroom or Closet - Mortise Lockbody Only

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Model: COR-ML2059-LL-626
From the ML2000_Series Collection
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$713.21
$284.26
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Corbin Russwin ML2059-LL Security Storeroom and Closet Mortise Lockbody, Grade 1, Field Reversible

Commercial-Grade Mortise Lock for Security Storeroom and Closet Applications

The Corbin Russwin ML2059-LL is a Grade 1 mortise lockbody engineered for security storeroom and closet functions in demanding commercial, institutional, industrial, and government environments. Built from heavy-gauge steel with a 1" stainless steel deadbolt and patented Quick Reversible latchbolt, this lockbody is designed for doors with a standard thickness of 1-3/4" (44mm) and features field-reversible handing for flexible installation. The included ANSI straight lip strike measures 4-7/8" (124mm) x 1-1/4" (32mm) x 1-1/8" (29mm) lip to center, ensuring a precise and secure fit. The ML2059-LL is part of the ML2000 Series, which has achieved UL Cycle testing above and beyond requirements at 14.5 Million Cycles (Verification ID: V875753).

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 Warehouse Facilities
  • Government and Municipal Buildings
  • Institutional and High-Security Storeroom Environments

Tamper-Resistant Design

The ML2000 Series supports the ML2000VR (Vandal Resistant) configuration featuring vandal-resistant stainless steel escutcheons with tapered edges and Torx® pin tamper-resistant screws. When paired with Corbin Russwin patented high-security Pyramid or Access 3® cylinders, any door can become a formidable barrier to intruders, making the ML2059-LL an ideal choice for security-sensitive storeroom and closet applications.

Why Choose Corbin Russwin Quality?

Corbin Russwin ML2000 Series mortise lockbodies deliver professional-grade reliability with heavy-gauge steel construction and a 1" stainless steel deadbolt, rated for an extraordinary 14.5 Million Cycles in UL Cycle testing (Verification ID: V875753). Backed by a 10 Year Limited warranty and featuring the patented Quick Reversible latchbolt, the ML2059-LL provides life safety and security in a single door prep for demanding commercial applications where dependable performance is essential.

Product Specs

Subcategory:
Mortise Locks
Product Group:
Mechanical Locks
Series:
ML2000 Series
Grade:
Grade 1
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
Product Subgroup:
Mortise Lock Bodies
Product Type:
Mortise Lockbody Only
Commercial/Residential:
Commercial
Function Description:
Mortise Lockbody Only
Lock Type:
Mortise
Lock Function:
Security Storeroom/Closet
Keyed:
Yes
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-LL-626 – Frequently Asked Questions

1) What exactly comes with the Corbin Russwin ML2059, and what else do I need to order to finish the door?
The ML2059 is the mortise lock case only. You get the lockbody with its armored front and the ANSI straight lip strike (4-7/8" x 1-1/4" x 1-1/8" lip to center). Lever or knob trim and the cylinder are separate orders. Plan on trim in the same finish you pick here and a 6-pin cylinder for the keyed outside.
2) Will the ML2059 mortise lock fit a 1-3/4 inch commercial door?
Yes, 1-3/4" (44mm) is the standard door thickness for the ML2059, with a 2-3/4" backset. The lock case measures 5-7/8" x 4" x 15/16", so your mortise pocket needs to take that. Optional thicknesses are available from the ML2000 Series for thicker doors.
3) What does the security storeroom function actually do on a door?
Outside lever or knob is always locked; key retracts the latchbolt for entry. Inside is always free for egress. The ML2059 adds the 1" stainless deadbolt over a plain storeroom lock, so you get keyed latch operation plus a deadbolt in one prep, which is why it gets specified for closets and storerooms holding tools, meds, or records.
4) Do I need to specify left or right hand when ordering the ML2059?
No. Handing is field reversible, and the patented Quick Reversible latchbolt lets you re-hand without opening the lock case. One part number covers both hands, which is useful if you're stocking spares for a building with mixed swings.
5) Can I use this mortise lock on a 3-hour fire rated door?
Yes. The ML2000 Series is UL/cUL listed to UL10C positive pressure and carries a 3-hour fire door rating up to 4' x 10' single or 8' x 10' pair. It also meets ADA A117.1 and is California State Fire Marshal and windstorm/hurricane certified.
6) Will my existing cylinders and key system work with the ML2059?
It takes a standard mortise cylinder and works with new or existing Corbin Russwin key systems. It also accepts most other manufacturers' cylinders, so you can key it into a master system you already run. The factory cylinder spec is brass, 6-pin, L4 keyway, 0-bitted.
7) Will this lock latch into the strike that's already in my frame?
The latchbolt is a two-piece anti-friction design with a 3/4" (19mm) throw, plus a deadlocking auxiliary latch at 9/16" effective throw and a 1" deadbolt throw. If your frame already has an ANSI strike prep, the supplied ANSI straight lip strike (4-7/8" x 1-1/4", 1-1/8" lip to center) drops into it. A non-ANSI or shallow box will need to be reworked for the 1" deadbolt.
8) Is there a Grade 1 mortise lock body from another manufacturer that also re-hands in the field?
Yes. The Accentra 8800FL Series mortise lock body is a Grade 1 lock body with field reversible handing, the same two attributes the Corbin Russwin ML2059 carries: ANSI/BHMA Grade 1 and field reversible handing by way of the patented Quick Reversible latchbolt, which re-hands without disassembling the lock case. The practical difference is keying and trim ecosystem - the ML2059 ships 0-bitted in a 6-pin L4 keyway and accepts Corbin Russwin ML2000 Series trim, so if the building is already standardized on Corbin Russwin cylinders and levers, staying in the ML2000 Series keeps one key system and one trim stock across the facility.
9) We need a storeroom mortise lock but the door already has Accentra trim on it - does the Corbin Russwin ML2059 still make sense?
The ML2059 is a lock body only, so it is ordered with Corbin Russwin ML2000 Series trim and cylinder to complete the opening. If the existing levers and escutcheons on the door are Accentra and you intend to reuse them, the Accentra 8800FL Series Grade 1 mortise lock body is the body that matches that trim line. Both are Grade 1 field reversible mortise bodies, so the decision comes down to which trim and key system the opening is already committed to rather than to the body's rating.
10) Is a mortise lock like the ML2059 worth it over a cylindrical lock for a storeroom?
For high-traffic or security-sensitive openings, yes. A mortise case like the ML2059 puts the latch and a 1" deadbolt in a single door prep and carries ANSI/BHMA A156.13 Series 1000 Operational and Security Grade 1. It was cycle tested to 14.5 million cycles (UL Verification ID V875753). A cylindrical lock is a simpler prep and easier to retrofit, but it won't give you the deadbolt or that case strength.
11) What trim spacing do I need to lay out for the ML2059?
Center to center from knob or lever to cylinder is 3-5/8" (92mm), and knob or lever to thumbturn is 2-7/16" (62mm). The armored front is 8" x 1-1/4". Use those when checking that a sectional or escutcheon trim you already have lines up.
12) Can I standardize on one mortise lock body and change functions later?
Within the ML2000 Series, twelve functions are configurable from a single ML2054 lockbody, so a facility can carry fewer spares. The ML2059 itself ships as the security storeroom/closet function. The series also offers status indicator trim for locked/unlocked visibility and a vandal-resistant ML2000VR configuration with Torx pin tamper-resistant screws for exposed openings.
13) Is there another brand's Grade 1 mortise lock body I can use instead?
The Accentra 8800FL Series mortise lock body is a Grade 1 lock body with field reversible handing, so it covers the same slot if you're standardizing on a different brand. Note it's a different manufacturer's case, so trim, cylinder and prep from a Corbin Russwin ML2000 opening do not carry over directly.
14) For a school standardizing storeroom doors, is the Accentra 8800FL body a direct functional substitute for the ML2059?
Both are Grade 1 mortise lock bodies with field reversible handing, so at the rating level they sit in the same class. Where they differ is function coding: the ML2059 is specifically the Security Storeroom or Closet function, with a 1 inch stainless steel deadbolt alongside the latchbolt, and the ML2000 Series body is multi-function capable with 12 functions configurable from a single body. If you cross to the Accentra body you need to confirm the function code on that order separately, because the 8800FL body is identified by grade and handing rather than by a storeroom function. For a facility standardizing one storeroom function across many doors, matching the exact function code on every body is the part that has to line up.
15) What finishes does the ML2059 mortise lockbody come in?
Fourteen finishes, covering brass and bronze through nickel, chrome and stainless: 605 bright brass, 606 satin brass, 611 bright bronze, 612 satin bronze, 613 oil-rubbed satin bronze, 613E dark oxidized 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. 626 and 630 are the usual commercial picks for matching existing hardware.
16) Does the ML2059 have any electrified option, or is it strictly mechanical?
The ML2059 is a mechanical lockbody, not electronic. If you need electric latch retraction on the opening, Motorized Electric Latch Retraction (MELR) is offered in the ML20900 series rather than on this mechanical case.
17) Will an electrified or electronic mortise lock work in place of the ML2059 on the same door prep?
The ML2059 is a non-electronic mechanical lock body, keyed, 2-3/4 inch backset with an 8 inch by 1-1/4 inch armored front and the ANSI straight lip strike at 4-7/8 inch by 1-1/4 inch. The ML2000 Series does offer Motorized Electric Latch Retraction in the ML20900 series if the opening needs to be released electrically, so that is the path to stay within the same series and door prep rather than switching to an unrelated electronic lockset. Note that the Accentra 8800FL Series body is a mechanical lock body as well and is not a substitute if what you actually need is electric latch retraction.
How fast can I get the Corbin Russwin COR-ML2059-LL-626 delivered?
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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-LL-626 come with a warranty?
Absolutely. The Corbin Russwin COR-ML2059-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 COR-ML2059-LL-626?
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