Corbin Russwin ML2075 Grade 1 ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$713.21
$418.91
Corbin Russwin Corbin Russwin ML2075 Security Entrance or Office - Mortise Lockbody Only COR-ML2075-LL

Corbin Russwin ML2075 Grade 1 Security Entrance or Office - Mortise Lockbody Only

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Model: COR-ML2075-LL-626
From the ML2000_Series Collection
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$713.21
$418.91
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Corbin Russwin ML2075 Security Entrance/Office Mortise Lockbody, Grade 1, Field Reversible, 1-3/4" Door

Commercial-Grade Security Entrance Mortise Lock for High-Traffic Applications

The Corbin Russwin ML2075 is a Grade 1 Security Entrance/Office mortise lockbody from the ML2000 Series, engineered for demanding commercial, institutional, industrial, and government environments. This lockbody-only unit is constructed of heavy-gauge steel and features a patented Quick Reversible latchbolt along with a 1" stainless steel deadbolt, designed for standard 1-3/4" (44mm) door thickness. The ML2075 function allows the latchbolt to operate freely from either side unless the outside grip is locked by projection of the deadbolt, with the inside grip simultaneously retracting both the latchbolt and deadbolt for reliable egress. An auxiliary latch deadlocks the latchbolt for added security, and a status indicator shows deadbolt position.

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
  • High-Traffic Institutional Environments

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-abuse environments. When paired with Corbin Russwin patented high-security Pyramid or Access 3® cylinders, the ML2075 becomes a formidable barrier against unauthorized entry.

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, backed by UL cycle testing verified at 14.5 Million Cycles (Verification ID: V875753) — performance that far exceeds standard commercial requirements. The ML2075 is covered by a 10 Year Limited warranty, providing long-term confidence for facility managers and installers. Engineered for the most demanding commercial, institutional, and government applications where dependable security and life safety performance are essential.

Product Specs

Subcategory:
Mortise Locks
Product Group:
Mechanical Locks
Series:
ML2000 Series
Grade:
Grade 1
Keyed Function:
Non-Keyed
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
Keyed:
No
Commercial/Residential:
Commercial
Function Description:
Mortise Lockbody Only
Lock Type:
Mortise
Lock Function:
Security Entrance/Office
Product Attribute:
Mortise Locks
Electronic:
No
Product Model:
ML2075
Collection:
ML2000_Series
Product Function:
Security 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-ML2075-LL-626 – Frequently Asked Questions

1) Does the Corbin Russwin ML2075 mortise lock come with levers, trim, and a cylinder?
No. The ML2075 is the lockbody only, so you're getting the case, latchbolt and deadbolt and nothing else. Trim (lever or knob, roses or escutcheons), the cylinder and the thumbturn all get ordered separately. The body ships non-keyed, so plan the cylinder as its own line item. Spacing to lay out your trim: center to center, knob or lever to cylinder is 3-5/8 inches (92mm), and knob or lever to thumbturn is 2-7/16 inches (62mm).
2) What door thickness does the ML2075 mortise lockbody fit?
Standard is 1-3/4 inch (44mm) doors, which covers most commercial openings. Corbin Russwin does build the ML2000 Series for other thicknesses, but that is an option you have to call out on the order rather than something the standard body handles.
3) Do I have to order the ML2075 handed, or can I flip it on the job?
Order it and re-hand it on site. The ML2075 uses Corbin Russwin's patented Quick Reversible latchbolt, so the handing changes without opening the lock case. For a service truck or a multi-door job that means one body covers left and right hand openings.
4) What does the ML2075 Security Entrance/Office function actually do at the door?
Latchbolt works freely from either side until you throw the deadbolt, which locks the outside grip. Turning the inside grip pulls the latchbolt and deadbolt back together in one motion, so nobody is trapped behind a thrown deadbolt. There's a status indicator showing whether the deadbolt is projected, and an auxiliary latch that deadlocks the latchbolt against carding.
5) Will the ML2075 latch into the strike that's already in my frame?
It needs an ANSI strike. The standard strike is the ANSI straight lip at 4-7/8 x 1-1/4 inches with 1-1/8 inch lip to center, and the lock throws a 3/4 inch (19mm) two-piece anti-friction latchbolt plus a 1 inch (25mm) stainless deadbolt. If your frame is already prepped ANSI for a mortise lock you're fine; a cylindrical strike cutout is not, and neither is a strike box too shallow for a 1 inch deadbolt. Check the pocket depth for the bolt before you set it.
6) Will the ML2075 take the cylinders from my existing master key system?
Yes, it works with new or existing Corbin Russwin key systems, and it accepts most other manufacturers' cylinders, so an existing masterkey system on another brand can usually carry over. Cylinder spec is brass, 6-pin, L4 keyway, 0-bitted as standard. For high security openings it pairs with Corbin Russwin patented Pyramid or Access 3 cylinders.
7) Will the ML2075 lockbody fit my existing mortise pocket?
The case measures 5-7/8 x 4 x 15/16 inches (149 x 102 x 24mm) in heavy-gauge steel, with a 2-3/4 inch (70mm) backset and an 8 x 1-1/4 inch armored front in wrought brass, bronze or stainless. That is the standard ANSI mortise footprint, so a door already prepped for a full-size mortise lock at 2-3/4 backset takes it. A door with a 2-3/8 inch backset cylindrical bore does not; that opening needs a bored lock, not a mortise body.
8) What is the closest cross-brand equivalent to the Corbin Russwin ML2075 mortise lock body?
The Accentra 8800FL Series mortise lock body is the closest cross-brand match. Both are Grade 1 mortise lock bodies sold as the lock case alone, and both are field reversible for handing, so a door that was surveyed left hand can be flipped in the field without a second part number. The ML2075 is the Security Entrance/Office function within the ML2000 Series, with a latchbolt that operates from either side unless the outside grip is locked by projecting the deadbolt, and the inside grip retracting both bolts together. If the opening was specified around that specific two-bolt entrance behavior, confirm the Accentra function code matches before treating the two as interchangeable; the shared Grade 1 rating and the reversible case are what carry across.
9) If I order the Accentra 8800FL lock body instead of the ML2075, does the existing Corbin Russwin trim still fit?
Do not assume it does. The ML2075 and the Accentra 8800FL Series are both Grade 1 mortise lock bodies, but a mortise case carries manufacturer-specific spindle, cylinder, and thumbturn spacing, and the ML2075 case is built to the Corbin Russwin ML2000 Series trim program with knob or lever to cylinder spacing of 3-5/8 inch and knob or lever to thumbturn of 2-7/16 inch. Trim, escutcheons, and roses cut for those centers are not a cross-brand part. When you are replacing a failed case behind trim you intend to keep, staying within the ML2000 Series is the way to keep the existing trim and armored front working; treat the Accentra body as a full-assembly change rather than a drop-in case swap.
10) Should I use a mortise lock like the ML2075 or a heavy-duty cylindrical lock on a high traffic door?
Mortise is the answer when you want a deadbolt in the same body as the latch. The ML2075 gives you a 1 inch stainless deadbolt plus a 3/4 inch latchbolt in one case, so you get key-locked security and free egress from one prep. A cylindrical lock cannot do that in one unit. The trade-off is the door prep: mortise needs a milled pocket, so on an existing door with only a cross bore, a cylindrical lock is the lower-labour path. On new hollow metal or on doors already prepped ANSI mortise, the mortise body is the one that carries the cycle life here, UL tested to 14.5 million cycles.
11) Is one ML2000 lockbody enough if I need several different lock functions across a building?
For standardizing a facility, the ML2000 Series multi-function body covers 12 functions configurable from a single ML2054 lockbody, so you can stock one part and set the function you need at each opening. The ML2075 itself is the fixed Security Entrance/Office function. If your openings all need the same behaviour, the ML2075 is the straight order; if they vary, the multi-function route cuts what you have to keep on the shelf.
12) What other Grade 1 mortise lock bodies are there besides the Corbin Russwin ML2075?
The closest cross-brand equivalent is the Accentra 8800FL Series Grade 1 mortise lock body, which is also field reversible for handing, so it covers the same left or right hand decision on site. Both are Grade 1 mortise bodies sold as the body alone. Where the ML2075 is specified to a fixed Security Entrance/Office function, pick between them on which key system and trim family you're already standardized on.
13) Is the ML2075 tough enough for a school corridor or a psychiatric unit?
For abuse-prone openings the ML2000VR vandal resistant option adds stainless steel escutcheons with tapered edges and Torx pin tamper-resistant screws. Behavioral Health trim (BHSS/BLSS) is available in the series for ligature-sensitive spaces. Trim is thru-bolted for alignment and security, and the cycle testing behind the body is 14.5 million cycles, well past a typical corridor's duty.
14) Can I get electric latch retraction on the ML2075?
Not on the ML2075 itself; it's a mechanical body with no electrical option. Motorized Electric Latch Retraction is offered on the ML20900 series within the same ML2000 family. If the opening needs access control release or remote unlocking, that is the series to spec instead.
15) For a 3-hour fire rated opening, can I use either Grade 1 mortise body?
The Corbin Russwin ML2075 is the one to specify when the fire label drives the decision. It is UL/cUL listed to UL10C positive pressure and rated for 3-hour fire doors up to 4 feet by 10 feet single or 8 feet by 10 feet pair, and it also carries California State Fire Marshal listing and ADA A117.1. The Accentra 8800FL Series body is a Grade 1 mortise lock body, so it meets the same operational and security grade class, but match the fire label requirement to the specific body before it goes on a rated opening rather than relying on the shared Grade 1 rating to cover it.
16) I need a Grade 1 mortise lock body but I do not want to hand it on the drawing. What are my options?
Both the Corbin Russwin ML2075 and the Accentra 8800FL Series lock body are field reversible, so neither requires you to commit to a hand at order time. The ML2075 uses a patented Quick Reversible latchbolt that re-hands without opening the lock case, which matters when the reversal happens at the door with the case already mortised. For a facility standardizing across many openings, either choice removes handing from the takeoff; the deciding factor is usually which keyway and trim program the building is already on, since the ML2075 works with new or existing Corbin Russwin key systems and accepts most other manufacturers' cylinders.
17) What finishes can I get the ML2075 in to match the other doors in my building?
Fourteen finishes, spanning the brass and bronze range through plated and stainless: 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 a building standard, 626 and 630 are the two you'll most often find already on commercial openings. Base material is brass or bronze.
18) Does the ML2075 latchbolt hold up on a door with a strong closer or stack pressure?
The latchbolt is a two-piece mechanical design with an anti-friction insert, throwing 3/4 inch (19mm), and the insert cuts the force needed to close so the bolt seats instead of riding the strike lip. Behind it, a 9/16 inch (14mm) effective throw auxiliary latch deadlocks the main bolt once the door is shut. That combination is what you want on stair and corridor doors where the closer is fighting pressure.
How fast can I get the Corbin Russwin COR-ML2075-LL-626 delivered?
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Can I return it if it doesn’t work for me?
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Does the Corbin Russwin COR-ML2075-LL-626 come with a warranty?
Absolutely. The Corbin Russwin COR-ML2075-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-ML2075-LL-626?
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