Corbin Russwin ML2058 Grade 1 ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$667.10
$523.64
Corbin Russwin Corbin Russwin ML2058 Entrance or Office Holdback - Mortise Lockbody Only COR-ML2058-LL

Corbin Russwin ML2058 Grade 1 Entrance or Office Holdback - Mortise Lockbody Only

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Model: COR-ML2058-LL-626
From the ML2000_Series Collection
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$667.10
$523.64
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Corbin Russwin ML2058 Entrance/Office Holdback Mortise Lockbody with Field-Reversible Handing

Grade 1 Commercial Mortise Lock for High-Traffic Institutional and Office Applications

The Corbin Russwin ML2058 is a Grade 1 mortise lockbody engineered for entrance and office holdback functions in demanding commercial, institutional, industrial, and government environments. Constructed of heavy-gauge steel, this lockbody features a patented Quick Reversible latchbolt and a one-piece stainless steel deadbolt measuring 19/32" (15mm) x 1-1/4" (32mm) with a 1" (25mm) throw, designed for doors with a standard thickness of 1-3/4" (44mm). The ML2058 delivers life safety and security in a single door prep, and the ML2000 Series has been UL cycle tested above and beyond requirements at 14.5 Million Cycles (Verification ID: V875753), confirming exceptional long-term reliability. Note: Not approved for use on U.L. fire listed 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 Mixed-Use Properties
  • Institutional and High-Traffic Public Buildings

Tamper-Resistant Design

The ML2000VR (Vandal Resistant) Series option features vandal-resistant stainless steel escutcheons with tapered edges and Torx® pin tamper-resistant screws, providing a formidable barrier against abuse and unauthorized manipulation. When paired with Corbin Russwin patented high-security Pyramid or Access 3® cylinders, the ML2058 delivers enhanced protection against intrusion.

Why Choose Corbin Russwin Quality?

Corbin Russwin ML2000 Series mortise lockbodies deliver professional-grade reliability through heavy-gauge steel construction and a patented Quick Reversible latchbolt, with UL cycle testing verified at 14.5 Million Cycles (Verification ID: V875753) for proven long-term performance. Every ML2058 is backed by a 10 Year Limited warranty, providing confidence for demanding commercial, institutional, and government applications. Engineered to meet Grade 1 standards, the ML2058 is the trusted choice wherever dependable entrance and office holdback security 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
Keyed Function:
Single Cylinder
Product Subgroup:
Mortise Lock Bodies
Product Type:
Mortise Lockbody Only
Keyed:
Yes
Commercial/Residential:
Commercial
Function Description:
Mortise Lockbody Only
Lock Type:
Mortise
Lock Function:
Entrance/Office
Product Attribute:
Mortise Locks
Electronic:
No
Product Model:
ML2058
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 COR-ML2058-LL-626 – Frequently Asked Questions

1) Does the Corbin Russwin ML2058 come with trim, or is it just the lock case?
Lock case only. The ML2058 ships as a mortise lockbody, so the lever or knob trim, escutcheon or rose, cylinder and strike are all separate orders. Plan on specifying the trim design and finish to match the rest of the opening, plus a cylinder (the series uses a brass 6-pin L4 keyway, 0-bitted as standard) before the door is complete.
2) Will the ML2058 work on a 1-3/4 inch door with a 2-3/4 inch backset prep?
That is exactly the standard prep for it. The ML2058 is built for 1-3/4 inch (44mm) doors with a 2-3/4 inch (70mm) backset, and the lock case measures 5-7/8 x 4 x 15/16 inches. Optional door thicknesses are available from the series if your door is thicker or thinner than 1-3/4.
3) Can the ML2058 be used on a fire rated door?
No. The ML2058 is not approved for U.L. fire listed applications. If the opening is a rated door, pick a different function in the ML2000 family that carries the UL/cUL UL10C 3-hour positive pressure listing, which covers single doors up to 4 x 10 feet and pairs up to 8 x 10 feet.
4) Do I have to order the ML2058 left hand or right hand?
No handed part number needed. The latchbolt is a patented Quick Reversible design, so handing is changed in the field without opening the lock case. That makes it practical to stock one lockbody for a building with mixed swings.
5) What does the entrance/office holdback function on the ML2058 actually do?
It is a keyed entrance/office lock with a holdback feature: the outside lever or knob can be held in the retracted (unlocked) position so the door stays on free passage during business hours, then returned to locked operation with the key. It is a single-cylinder function, keyed outside only, and it also carries a one-piece stainless steel deadbolt with a 1 inch (25mm) throw for after-hours security.
6) Will the ML2058 latch into the strike already in my frame?
Check the strike depth. The latchbolt is a two-piece anti-friction unit with a 3/4 inch (19mm) throw, the auxiliary deadlatch has a 9/16 inch (14mm) effective throw, and the deadbolt throws a full 1 inch, so the frame needs a pocket deep enough for the deadbolt as well as the latch. The standard strike for the series is an ANSI straight lip at 4-7/8 x 1-1/4 inches with 1-1/8 inch lip to center, which is the common commercial frame prep.
7) Can I use my existing Corbin Russwin keys, or a cylinder from another brand?
Both work. The ML2000 Series lockbodies accept new or existing Corbin Russwin key systems and will also take most other manufacturers' mortise cylinders, so you can key the ML2058 into a building master system you already run. The factory standard is a brass 6-pin L4 keyway supplied 0-bitted.
8) Is there another Grade 1 mortise lock body that can replace a Corbin Russwin ML2058 if the ML2000 Series is not the standard on the building?
The Accentra 8800FL Series mortise lock body is the closest alternative: it is also a Grade 1 mortise lock body with field reversible handing, the same two characteristics that define the ML2058. The ML2058 is a Grade 1 mortise lockbody in the ML2000 Series set up for the entrance/office holdback function, keyed single cylinder, field reversible handing, for 1-3/4 inch doors. Swapping between manufacturers means the trim, cylinder and armored front come from that manufacturer's line as well, so this is a decision to make for a whole opening or a whole building rather than for one door where ML2000 trim is already installed.
9) We are bidding an opening that needs a fire labeled mortise lock. Is the ML2058 the wrong pick?
Yes, for a fire listed door the ML2058 is not the item to specify. The ML2000 Series carries UL/cUL UL10C positive pressure listing generally, but the ML2058 entrance/office holdback function itself is not approved for use on U.L. fire listed applications, because a holdback function can hold the latch retracted. For a labeled opening, select a non-holdback ML2000 function instead, and keep the same 2-3/4 inch backset and 1-3/4 inch door prep so the door machining does not change.
10) Is the ML2058 tough enough for a school or hospital corridor door?
It is certified to ANSI/BHMA A156.13 Series 1000, Operational and Security Grade 1, which is the top commercial rating, and the ML2000 Series has been UL cycle tested at 14.5 million cycles (Verification ID V875753). The case is heavy-gauge steel. For openings that take abuse there is also a vandal-resistant option in the series with tapered stainless escutcheons and Torx pin tamper-resistant screws.
11) What spacing do I need for the cylinder and thumbturn holes when prepping the door?
Center to center from the knob or lever to the cylinder is 3-5/8 inches (92mm), and knob or lever to thumbturn is 2-7/16 inches (62mm). The armored front is 8 x 1-1/4 inches in wrought brass, bronze or stainless. Those are the numbers to check against an existing mortise pocket before you commit.
12) Is there an electrified version of this lock for access control?
The ML2058 itself is a mechanical lockbody with no electrical function. If you need the door released electrically, the ML20900 series offers Motorized Electric Latch Retraction (MELR) within the same ML2000 family, so the door prep and trim language stay familiar.
13) What is a Grade 1 alternative to the Corbin Russwin ML2058 lockbody if I need a different brand?
The Accentra 8800FL Series Grade 1 mortise lock body is the closest cross-brand option we carry, and like the ML2058 it is field reversible for handing. Trim, cylinder and function selection are made within that brand's own system, so the two are not interchangeable parts inside one door; pick the family that matches the keyway and trim already standardized in your building.
14) Should I use a mortise lock like the ML2058 or a cylindrical lever lock?
A mortise lockbody goes into a pocket cut into the door edge and puts the latch and a 1 inch deadbolt in one prep, which is what you want on entrance and office doors in commercial, institutional and government buildings that see constant use. A cylindrical lock only needs a bored hole and is quicker to install, but it will not give you the deadbolt and the Grade 1 case in a single body. If the door is already mortise prepped at a 2-3/4 inch backset, stay with mortise.
15) If the handing was ordered wrong, does the Accentra 8800FL lock body solve that any better than the Corbin Russwin ML2058?
Neither one locks you into a hand. The ML2058 is field reversible, and the Accentra 8800FL Series mortise lock body is also described as field reversible handing, so on either lock body a left hand opening can be corrected in the field rather than returned. On the ML2058 the reversal is done with the patented Quick Reversible latchbolt, which re-hands the lock without disassembling the lock case. If field reversibility is the reason you are shopping, it is not a point of difference between the two.
16) Does buying the ML2058 get me a complete lockset, or do I need a different item?
The ML2058 is the mortise lockbody only. It is the steel case with the latchbolt, deadbolt and holdback mechanism; the lever or knob trim, the escutcheon or rose, and the cylinder are ordered separately. The Accentra 8800FL Series comparable is likewise a mortise lock body rather than a complete lockset. If you need a trimmed, keyed assembly ready to hang, order the ML2058 case together with ML2000 Series trim and a cylinder rather than expecting the case alone to finish the opening.
17) Which finishes does the ML2058 mortise lockbody come in?
Fourteen finishes, covering brass through stainless and painted: 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. Matching an existing building standard is usually a matter of reading the number off the old armored front.
How fast can I get the Corbin Russwin COR-ML2058-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 COR-ML2058-LL-626 come with a warranty?
Absolutely. The Corbin Russwin COR-ML2058-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-ML2058-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 COR-ML2058-LL-626 from ZenSupply?
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