Corbin Russwin ML2075 Grade 1 ...
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Corbin Russwin Corbin Russwin ML2075 Mortise Security Entrance or Office Lockset COR-ML2075-KEYED

Corbin Russwin ML2075 Grade 1 Mortise Security Entrance or Office Lockset

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Model: COR-ML2075-NSA-626
From the ML2000_Series Collection
$1,635.56
$939.00
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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

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$1,635.56
$939.00
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Corbin Russwin ML2075-KEYED ML2000 Series Grade 1 Mortise Security Entrance/Office Lock, Field Reversible

Commercial-Grade Mortise Security Entrance and Office Lock with Integrated Deadbolt Protection

The Corbin Russwin ML2075-KEYED is a Grade 1 mortise lock from the ML2000 Series, engineered for demanding commercial, institutional, industrial, and government applications. This security entrance/office function lock features a latchbolt operable by grip from either side unless the outside grip is locked by projection of the deadbolt, with the deadbolt thrown or retracted by outside key or inside thumbturn. Constructed of heavy-gauge steel with a 1" stainless steel deadbolt and patented Quick Reversible latchbolt, it is designed for 1-3/4" (44mm) door thickness and includes an ANSI straight lip strike measuring 4-7/8" (124mm) x 1-1/4" (32mm) x 1-1/8" (29mm) lip to center. The ML2075 has been UL cycle tested above and beyond requirements, completing 14.5 Million Cycles (Verification ID: V875753), making it an ideal choice for offices, schools, hospitals, hotels, and other 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
  • Educational Facilities and Schools
  • Healthcare Institutions and Hospitals
  • Hotel 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 provides vandal-resistant stainless steel escutcheons with tapered edges and Torx® pin tamper-resistant screws, further discouraging intrusion and abuse in high-risk environments. When paired with Corbin Russwin patented high-security Pyramid or Access 3® cylinders, any door can become a formidable barrier to intruders.

Why Choose Corbin Russwin Quality?

Corbin Russwin ML2000 Series mortise locks deliver professional-grade reliability through heavy-gauge steel construction and a patented Quick Reversible latchbolt with a 1" stainless steel deadbolt, UL cycle tested to an exceptional 14.5 Million Cycles (Verification ID: V875753). Every ML2075 is backed by a 10 Year Limited warranty and offers a wide variety of trim designs and finishes, including the Vineyard™ and Muséo® Collections, ensuring both performance and aesthetic continuity across any commercial project. Engineered for the most demanding commercial, institutional, and government applications where dependable security 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, 0 Bitted Keying
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
Latch Throw:
3/4" Latchbolt, 1" Deadbolt
Commercial/Residential:
Commercial
Function Description:
Latchbolt by grip from either side unless outside grip is locked by projection of deadbolt. Deadbolt thrown or retracted by outside key or inside thumbturn. Inside grip simultaneously retracts latchbolt and deadbolt.
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-NSA-626 – Frequently Asked Questions

1) Will the Corbin Russwin ML2075 mortise lock fit a 1-3/4 inch commercial door?
Yes, 1-3/4 inch (44mm) is the standard door thickness for the ML2075, with a 2-3/4 inch (70mm) backset. The lock case itself measures 5-7/8 x 4 x 15/16 inches, so the door needs a standard ANSI mortise pocket cut for it. Optional thicknesses are available beyond the 1-3/4 inch standard, so if you are hanging thicker doors that has to be called out on the order rather than assumed.
2) What does the ML2075 security entrance/office function actually do at the door?
Grip on either side retracts the latchbolt, unless the outside grip is locked by throwing the deadbolt. The deadbolt is thrown or pulled back by key outside or thumbturn inside, and the inside grip retracts latchbolt and deadbolt together in one motion, so anyone inside gets out in a single action. That combination is what makes it an office lock a tenant can secure from inside without a key, rather than a storeroom lock that stays locked all the time.
3) Do I have to order the ML2075 handed, or can I re-hand it in the field?
Field reversible. The patented Quick Reversible latchbolt lets you change the hand without taking the lock case apart, so one lock covers left and right hand openings on the same job. Worth knowing on a retrofit where you are not certain of the swing until the door is open. Note that the Dirke (DS) lever is offered as a specific left hand or right hand lever, so the lever itself is ordered to the door swing even though the case reverses.
4) Will the ML2075 latch into the strike prep I already have in the frame?
The lock ships with an ANSI straight lip strike, 4-7/8 x 1-1/4 inches with 1-1/8 inch lip to center, which is the standard ANSI mortise frame prep, so it drops into an existing ANSI strike cutout. Latchbolt throw is 3/4 inch (19mm), the auxiliary deadlatch gives 9/16 inch (14mm) effective throw, and the stainless deadbolt throws a full 1 inch. If your frame carries a non-ANSI or T-strike prep, the frame is what has to change, not the lock.
5) Can I key the ML2075 into my existing building master key system?
Yes. It can be used with new or existing Corbin Russwin key systems, and it accepts most other manufacturers' cylinders, which is what matters if the building is keyed in another brand. The standard cylinder is a conventional 6-pin, L4 keyway, shipped 0-bitted. If you run interchangeable core, order CL6 for LFIC 6-pin less core or CL7 for LFIC 7-pin less core and drop your own cores in. LC (less cylinder) is there when your locksmith is supplying the cylinder outright. Multiple locks can be ordered keyed alike; keyed different is the standard.
6) Is the ML2075 approved for a fire rated door?
UL and cUL listed, and UL10C positive pressure rated for 3 hour fire doors up to 4 ft x 10 ft single or 8 ft x 10 ft pair. It also meets ANSI/BHMA A156.13 Series 1000 at Operational and Security Grade 1, ADA A117.1, California State Fire Marshal, and is windstorm/hurricane certified. That set covers most institutional and healthcare spec requirements without a substitution request.
7) What do I have to specify when ordering an ML2075 mortise lockset?
Four decisions. Lever design, from Armstrong, Citation, Dirke (specified left or right hand), Essex, Lustra, Newport, Princeton or Regis. Trim, either an A rose at 2-1/4 inch diameter, an F rose at 2-7/8 inch, or an M or N escutcheon. Finish, from fourteen including 626 satin chrome, 630 satin stainless, 613 oil-rubbed bronze and BSP black suede powder coat. And the cylinder and keying, standard 6-pin L4, LC less cylinder, or CL6/CL7 less core, keyed different or keyed alike. Escutcheon trim is the route if you want the status indicator option showing locked/unlocked.
8) I need a mortise lock that stays locked outside at all times, not one an occupant can unlock. Is the ML2075 right?
No. The ML2075 is an entrance/office function, so the outside grip stays unlocked until someone throws the deadbolt, meaning the door is open by default. For a door that is always secure from the outside and requires a key every time, you want a storeroom function instead, such as the Cal-Royal NM8080 Grade 1 storeroom mortise lockset or the Accentra 8805FL Grade 1 storeroom mortise lock with Arcadia lever. Use the ML2075 where an occupant controls the door, and a storeroom lock where the building does.
9) What is the closest cross-brand equivalent to the Corbin Russwin ML2075 entrance/office mortise lock?
The Cal-Royal NM8050 is the nearest match in the comparable set. It is a heavy duty Grade 1 mortise lockset with an Entrance/Office function for 1-3/4 inch doors, which lines up with the ML2075's Grade 1 rating, Security Entrance/Office function, and 1-3/4 inch door thickness. The ML2075 pairs its latchbolt with a 1 inch deadbolt thrown by outside key or inside thumbturn, so confirm the deadbolt behavior the opening needs before treating the two as interchangeable.
10) The opening needs a classroom function instead of entrance/office - what mortise lock covers that?
The Cal-Royal NM8070 is a heavy duty Grade 1 mortise lockset with a Classroom function for 1-3/4 inch doors, matching the ML2075's Grade 1 rating and 1-3/4 inch door thickness while changing the function. For a corridor or dormitory opening, the Sargent 7925 is a Grade 1 heavy duty mortise lock with Corridor/Dormitory function and a single cylinder deadbolt. The ML2075 itself is a Security Entrance/Office function with a single cylinder deadbolt.
11) What should be used instead of the ML2075 on a door thinner than 1-3/4 inches?
The Corbin Russwin ML2075 is built for a 1-3/4 inch door. The Baldwin 6310 entry/storeroom mortise lock body covers 1-3/8 inch and over on a 2-1/2 inch backset, and the Alarm Lock DL3500CR Grade 1 classroom mortise lock covers 1-5/8 to 1-7/8 inch. For a thin ornamental iron stile, the Marks USA 22AC entrance double cylinder mortise lock is built for a 1 inch door. Match the backset as well as the thickness, since the ML2075 runs a 2-3/4 inch backset.
12) Will a mortise deadbolt do the same job as the ML2075?
No - those are different parts. The Sargent 4874 is a double cylinder mortise deadbolt on a 2-3/4 inch backset, and the Alarm Lock DL4500 is a Grade 1 electronic mortise deadbolt with a privacy keypad. A deadbolt alone throws a bolt and nothing else. The Corbin Russwin ML2075 combines a latchbolt operable by grip from either side with a deadbolt thrown by outside key or inside thumbturn, and the inside grip retracts latchbolt and deadbolt together for single-motion egress. If the door already has a latch and only needs a bolt added, the deadbolts fit; if it needs both in one case, the ML2075 does.
13) What mortise lock suits a behavioral health or anti-ligature opening rather than a standard office door?
The TownSteel MRX-L-01 is a Grade 1 heavy duty stainless steel anti-ligature lever mortise lockset in passage function for 1-3/4 inch doors, and the MRX-A-01 is the same passage function with satin stainless ligature resistant arch trim. The Marks USA 5PDN is a Grade 1 hospital passage mortise push/pull paddleset, ligature resistant and ADA compliant in satin stainless steel. All three are passage function. The Corbin Russwin ML2075 is a keyed Security Entrance/Office function, and its Behavioral Health BHSS and BLSS trim designs address the same environment while keeping the lock keyed.
14) The door needs an electrically controlled mortise lock tied to an access control panel - what replaces the ML2075?
The Corbin Russwin ML2075 is a mechanical lock. For panel-controlled openings, the BEST 45HW is a wired electromechanical mortise lock running 12V or 24V, the Command Access ML190 is a heavy-duty motorized mortise lock with field selectable EL or EU operation on 24VDC in storeroom function, and the Schlage L9092EU with 03A trim is a heavy duty electric lock/unlock outside lever mortise lock, keyed outside, with request to exit on 12/24VDC for 1-3/4 inch doors. The ML2075 family does offer Motorized Electric Latch Retraction on the ML20900 series if the Corbin Russwin keyway is being kept.
15) Does the ML2075 work on an aluminum storefront or glass door?
It is built for a 1-3/4 inch door with a 2-3/4 inch backset and a mortise pocket, which is not a storefront prep. For narrow stile and glass openings, the Kaba Ilco BR Series is a glass door bottom rail lock, the Alarm Lock DL1300NW is a Trilogy Networx wireless electronic mortise lock with keypad made for Adams Rite deadlatches, and the Dormakaba E-Plex 2066 is an electronic pushbutton keyless mortise lock for wide stile doors.
16) What separates the ML2075 from a storeroom function mortise lock?
Function behavior. The Accentra 8805FL is a Grade 1 storeroom mortise lock with an Arcadia lever, and the Cal-Royal NM8080 is a heavy duty Grade 1 storeroom mortise lockset with an interchangeable core option for 1-3/4 inch doors - a storeroom outside lever stays locked and is released by key. The Corbin Russwin ML2075 keeps the latchbolt operable by grip from either side unless the outside grip is locked by projection of the deadbolt, so the office side decides when the door secures. If a core-swap program is in place, note that the ML2075 can be ordered CL6 or CL7 less core for large format interchangeable cores.
17) Is a mortise lock like the ML2075 worth it over a cylindrical lock on an office door?
The case for mortise here is the deadbolt. A cylindrical lock such as the Schlage PC10 Grade 1 passage lock has a latch only, while the ML2075 puts a one-piece stainless deadbolt with a 1 inch throw in the same case as the latch, so the occupant secures the door from inside with a thumbturn and no second deadbolt is needed above the lock. It costs you a mortise pocket in the door instead of a 2-1/8 inch bore. If the door is already mortise prepped, mortise is the straightforward choice; if it is bored, converting to mortise means new doors or filler plates.
18) How much traffic will an ML2075 mortise lock take in a school or hospital corridor?
It has been UL cycle tested to 14.5 million cycles (Verification ID V875753), well past the ANSI/BHMA Grade 1 requirement it is certified to under A156.13 Series 1000. The case is heavy-gauge steel and the two-piece latchbolt carries an anti-friction insert, which reduces the force needed to close the door, so it holds up where closers and heavy pull rates are involved. That is the reason it goes into schools, hospitals, hotels and government buildings.
19) What is the equivalent to the ML2075 if I want a Grade 1 entrance/office mortise lock from another brand?
The Cal-Royal NM8050 is the closest match in our range: a heavy duty Grade 1 entrance/office mortise lockset with auxiliary deadlatch, also for a 1-3/4 inch door. Where the two part ways is the electives, the ML2075 gives you nine lever designs, four rose and escutcheon options and fourteen finishes, plus interchangeable core cylinder choices. If you are matching existing Corbin Russwin openings in a building, staying with the ML2000 Series keeps trim and keying consistent.
20) I need card or keypad access on this door. Can the ML2075 do that?
No, the ML2075 is a mechanical lock with no electronics in it. For credentialed access in the same mortise prep, look at the TownSteel FME-2000 Series Grade 1 RFID mortise lockset or the Dormakaba E-Plex E5086 Grade 1 pushbutton and card mortise lock. Within Corbin Russwin's own ML20900 range, motorized electric latch retraction (MELR) is offered, which is the path if you want the door released from an access control panel while keeping the ML2000 trim and keyway across the building.
21) Can I standardize a whole floor of doors on the ML2000 Series and still use different functions?
Yes, and that is the practical argument for the series. Twelve functions are configurable from the one ML2054 lockbody, so entrance/office, classroom, storeroom and the rest share a common case, common prep and common trim across the building. Order the ML2075 where you need entrance/office and the maintenance staff carries one family of parts. Trim, finish and keyway carry across, which is what keeps a corridor looking consistent when a lock gets swapped years later.
22) How far apart are the lever and the cylinder on an ML2075, and what does the front look like?
Center to center from knob or lever to cylinder is 3-5/8 inches (92mm), and lever to thumbturn is 2-7/16 inches (62mm). The armored front is wrought brass, bronze or stainless steel at 8 x 1-1/4 inches. Those are the numbers that decide whether the escutcheon you are replacing lines up with the existing holes in the door face, so check them against your old trim before you pull the door.
23) Is there a simpler mortise lock for doors that do not need a key or a deadbolt?
Where the opening only needs to latch, the Schlage PM010 is a Grade 1 passage latch mortise lock, non-keyed, for 1-3/4 inch doors, and the Falcon MA101 is a Grade 1 heavy duty mortise passage lock with field reversible operation and a fire rating. For an office function without a key, the Hager 3850E is a Grade 1 office mortise lock with lever and escutcheon, non-keyed, on a 2-3/4 inch backset. The Corbin Russwin ML2075 is keyed with a single cylinder and carries a 1 inch deadbolt, so those three are the route when no cylinder is wanted.
24) Which mortise locks give the same opening a keypad or credential instead of a key?
The Corbin Russwin ML2075 is a mechanical lock, keyed with a conventional 6-pin L4 keyway cylinder. If the opening is moving to credentials, the BEST 45HZ EZ Series is an electronic keypad mortise lock with key override, the Dormakaba E-Plex E5086 is a Grade 1 electronic pushbutton and card mortise lock in a back to back arrangement, and the TownSteel FME-2000 is a Grade 1 heavy duty classroom mortise lockset with RFID for 1-3/4 inch doors. The Schlage LEMD-GRW is a Grade 1 ENGAGE Series wireless mortise lock with a 125kHz proximity reader and a 3 hour fire rating.
25) Are Emtek mortise entrance locksets a substitute for the ML2075?
They are not. The Emtek 3102 Memphis, 3104 Hamilton, 3106 Manhattan, and 3019 Brisbane mortise entrance locksets are all dummy function - trim that mounts to the door without operating a latch or bolt. The Schlage L0170 is likewise a Grade 1 mortise half dummy trim for 1-3/4 inch doors. The Corbin Russwin ML2075 is a keyed working lockset with a 3/4 inch latchbolt and a 1 inch deadbolt. Dummy sets belong on the inactive leaf of a pair; the ML2075 goes on the leaf that has to lock.
26) Can a cylindrical lock be used in place of the ML2075?
Only if the door is prepped for one. The Schlage PC10 is a Grade 1 passage cylindrical lock with a rose for 1-3/4 inch doors - a cylindrical lock installs through a bored hole, while the Corbin Russwin ML2075 is a mortise lock that needs a pocket cut into the door edge. The two door preps are not interchangeable. Within the mortise preps, the Cal-Royal NM8080 storeroom and Accentra 8805FL storeroom are Grade 1 mortise alternatives that keep the same door cutout.
27) For a restroom or bedroom door, is the ML2075 the right mortise lock?
No - it is keyed with a single cylinder for a Security Entrance/Office function. Privacy openings are served by the Cal-Royal NM8440, a heavy duty Grade 1 privacy mortise lockset with deadbolt for 1-3/4 inch doors, and the Hager 3840S, a Grade 1 privacy mortise lock on a 2-3/4 inch backset for 1-3/4 to 2 inch doors. Both are bed and bath privacy function, locked from inside without a key.
28) Can a mortise lock body be ordered on its own instead of a complete ML2075 lockset?
Yes, where only the case is being replaced. The BEST 45H is a heavy duty mortise lock body in public entrance function with field reversible operation, and the 45HCA is a heavy duty mortise lockbody with an intruder function. The Baldwin 6301 is an entry/apartment mortise lock body on a 2-1/2 inch backset for 1-3/4 inch doors and over, offered knob by knob or, as the 6301LS, lever by lever. The Corbin Russwin ML2075 ships as a lockset with lever, rose or escutcheon trim, and its ANSI straight lip strike, and it is field reversible.
29) Which ML2075 finish should I pick for a high-abuse or behavioral health area?
Stainless is the durable end of the range, 629 bright stainless or 630 satin stainless, and 630 is the usual commercial default for corridors that get scuffed. The ML2000 Series also offers Behavioral Health trim (BHSS/BLSS) and a vandal-resistant ML2000VR option with stainless escutcheons, tapered edges and Torx pin tamper-resistant screws, which is what you want in a detention, psych or heavily abused public area. Softer decorative finishes like 605 bright brass or 613 oil-rubbed bronze suit lobby and hospitality openings better.
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Does the Corbin Russwin COR-ML2075-NSA-626 come with a warranty?
Absolutely. The Corbin Russwin COR-ML2075-NSA-626 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
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