Corbin Russwin ML2053 Grade 1 ...
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Corbin Russwin Corbin Russwin ML2053 Mortise Entrance Lever Lockset COR-ML2053-KEYED

Corbin Russwin ML2053 Grade 1 Mortise Entrance Lever Lockset

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Model: COR-ML2053-NSA-626
From the ML2000_Series Collection
$1,483.00
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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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Corbin Russwin ML2053-KEYED ML2000 Series Grade 1 Mortise Entrance Lever Lockset with Field Reversible Handing

Commercial-Grade Mortise Security for High-Traffic Entrance and Office Applications

The Corbin Russwin ML2053-KEYED is a Grade 1 mortise entrance lever lockset from the ML2000 Series, engineered for demanding commercial, institutional, industrial, and government applications. Constructed of heavy-gauge steel, this lockset features a patented Quick Reversible latchbolt and a 1" stainless steel deadbolt, and is designed for standard 1-3/4" (44mm) door thickness. The outside grip may be locked or unlocked by key or thumbturn, while the inside grip remains always free, providing reliable access control and life-safety compliance in a single door preparation. The ANSI straight lip strike measures 4-7/8" (124mm) x 1-1/4" (32mm) x 1-1/8" (29mm) lip to center, and the one-piece stainless steel deadbolt delivers a 19/32" (15mm) x 1-1/4" (32mm) x 1" (25mm) throw.

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

Why Choose Corbin Russwin Quality?

Corbin Russwin ML2000 Series mortise locksets 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) to ensure long-term performance in the most demanding environments. Every ML2053-KEYED lockset is backed by a 10 Year Limited warranty, providing lasting confidence for facility managers, contractors, and end users alike. Engineered for commercial, institutional, and government applications where dependable access control and life-safety performance are 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 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 Locks and Trim
Product Type:
Mortise Locks
Keyed:
Yes
Commercial/Residential:
Commercial
Function Description:
Latchbolt by grip either side, unless outside grip is locked or unlocked by key or thumbturn. Outside grip locked or unlocked by key or thumbturn. Latchbolt by key when outside grip locked
Lock Type:
Mortise
Handle Type:
Lever
Lock Function:
Entrance/Office
Product Attribute:
Mortise Locks
Electronic:
No
Product Model:
ML2053
Collection:
ML2000_Series
Product Function:
Entrance/Office
Door Hand Direction:
Field Reversible
Product Category:
Mechanical Locks
Product Substrate:
Brass or Bronze
Department:
Door Hardware

Parts & Accessories

    Corbin Russwin COR-ML2053-NSA-626 – Frequently Asked Questions

    1) Will the Corbin Russwin ML2053 mortise lock fit a 1-3/4 inch door?
    Yes, 1-3/4 inches (44mm) is the standard door thickness for the ML2053, with optional thicknesses available. Backset is 2-3/4 inches (70mm), which is the usual commercial mortise backset. The lockcase itself measures 5-7/8 x 4 x 15/16 inches, so the door needs a mortise pocket cut for that body. Note that the lever and spindle assemblies, escutcheons and thumbturn packets are all built specifically for 1-3/4 inch doors, so a thicker door means specifying the optional thickness up front rather than swapping trim later.
    2) Do I have to order the ML2053 mortise lockset handed, or can it be reversed in the field?
    Handing is field reversible. The ML2053 uses a patented Quick Reversible latchbolt, so the hand can be changed without opening the lock case, which matters when a door gets rehung or when a stocking contractor wants one part number to cover both hands. The one place hand still gets specified is the Dirke (DS) lever, which comes as a left hand or a right hand lever.
    3) Will the ML2053 latch into the strike prep that is already in my 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 commercial frame prep, so an existing ANSI strike cutout normally takes it directly. The latchbolt throws 3/4 inch (19mm) and the auxiliary deadlatch has a 9/16 inch effective throw. The deadbolt throws a full 1 inch and needs a deeper strike pocket than the latch alone, so check the frame has the deadbolt hole as well as the latch hole before you order.
    4) Can I put the ML2053 on a 3-hour fire rated door?
    Yes. The lockset is UL/cUL listed and UL10C positive pressure rated, good for a 3-hour fire door up to 4 ft x 10 ft single or 8 ft x 10 ft pair. It also carries ANSI/BHMA A156.13 Series 1000 Grade 1 for both operational and security grade, ADA A117.1, California State Fire Marshal, and windstorm/hurricane certification. For a facility standardizing openings across corridors and stairs, that set covers most spec requirements in one part number.
    5) Can I key the ML2053 into my existing master key system, or use interchangeable cores?
    Both work. The standard build is a conventional 6-pin brass cylinder in the L4 keyway, 0-bitted, so a locksmith can pin it to an existing Corbin Russwin system. If you run someone else's system, order it LC (less cylinder) and drop in your own; the ML2000 lock accepts most other manufacturers' cylinders. For interchangeable core shops there are CL6 and CL7 options, supplied less core for 6-pin or 7-pin LFIC. Keying is specified as keyed different or keyed alike when you order, so a property manager putting the same key on a run of office doors asks for KA.
    6) I need a storeroom or classroom function instead of office. What should I order?
    The ML2053 is entrance/office only, meaning the outside lever can be left unlocked by the thumbturn. If you need a lever that is always locked from outside and only opens by key, that is storeroom function: the Accentra 8805FL is a Grade 1 storeroom mortise lock, the Cal-Royal NM8080 is a Grade 1 storeroom mortise lockset with an interchangeable core option. For classrooms, the Cal-Royal NM8070 is a Grade 1 classroom mortise lockset. Privacy for a restroom or a single occupant office is the Cal-Royal NM8440 Grade 1 privacy mortise lockset with deadbolt. Same door prep family, different way the outside lever behaves.
    7) What do I have to pick when ordering the ML2053, and what comes with it?
    Four choices decide the part. Lever style, from Armstrong, Citation, Dirke (left or right hand), Essex, Lustra, Newport, Princeton or Regis. Rose or escutcheon, either the A rose at 2-1/4 inch diameter, the F rose at 2-7/8 inch, or the M or N escutcheon. Finish, fourteen of them from bright brass through satin chrome, satin stainless, oil-rubbed bronze and black suede powder coat. Then the cylinder: standard conventional 6-pin L4, less cylinder, or LFIC less core in 6-pin or 7-pin, plus keyed different or keyed alike. The strike, armored front and trim come as part of the lockset; trim is thru-bolted.
    8) What do I use for a classroom door if the ML2053 entrance function is not the right one?
    The Cal-Royal NM8070 is a heavy duty Grade 1 classroom mortise lockset with an auxiliary deadlatch for 1-3/4 inch doors, and the Marks USA LA318GJ is a Grade 1 classroom security indicator mortise lockset for 1-3/4 inch doors with an ANSI strike and a steel escutcheon measuring 8-1/2 inch H x 2-3/4 inch W x 7/16 inch. Both keep the classroom function the ML2053 does not provide - the ML2053 is Entrance/Office, with the inside grip always free and the outside grip locked or unlocked by key or thumbturn.
    9) What is the closest Grade 1 mortise entrance/office lockset to the Corbin Russwin ML2053?
    The Cal-Royal NM8050 is a heavy duty Grade 1 office/entrance mortise lockset with an auxiliary deadlatch, sized for 1-3/4 inch doors. That matches the ML2053 on the points that decide an entrance opening: Grade 1, an Entrance/Office function where the outside grip is locked or unlocked by key or thumbturn while the inside grip stays free, and a 1-3/4 inch standard door thickness. The ML2053 carries a 2-3/4 inch backset, an ANSI straight lip strike 4-7/8 x 1-1/4 x 1-1/8 inch, and a 6-pin L4 keyway cylinder, so a swap to the NM8050 means a different key system unless the building is being rekeyed.
    10) The opening needs to stay locked at all times with key-only entry - what mortise lock should I use instead of the ML2053?
    Use a storeroom function lock rather than an entrance/office one. The Accentra 8805FL is a Grade 1 storeroom mortise lock from the 8800 Series with an Arcadia lever, and the Cal-Royal NM8080 is a heavy duty Grade 1 storeroom mortise lockset with an interchangeable core option. The ML2053 is an Entrance/Office function, where the outside grip can be left unlocked by key or thumbturn, so a storeroom opening that must never be dogged open is the wrong application for it.
    11) Is a Baldwin 6301 mortise lock body a drop-in replacement for the Corbin Russwin ML2053?
    No. The Baldwin 6301 is an entry/apartment mortise lock body on a 2-1/2 inch backset, offered knob by knob or, as the 6301LS, lever by lever, for doors 1-3/4 inch and over. The ML2053 uses a 2-3/4 inch backset, so the cross bore and lever centerline land in a different place and the existing door prep will not accept it without rework. Function is also different: the ML2053 is Entrance/Office with a key or thumbturn locking the outside grip.
    12) Will the Emtek 3102 Memphis mortise entrance lockset work in place of an ML2053?
    No - the Emtek 3102 Memphis, along with the 3104 Hamilton, 3106 Manhattan and 3019 Brisbane, is a dummy function mortise entrance lockset. Dummy trim has no latch operation and no keying at all; it is surface applied for the inactive leaf of a pair or a false door. The ML2053 is a keyed single cylinder Entrance/Office lockset with a working latchbolt and deadbolt. The word entrance in an Emtek dummy name describes the trim styling, not the lock function.
    13) What is the difference between the ML2053 and a Sargent 7925 for a dormitory corridor door?
    The Sargent 7925 is a Grade 1 heavy duty dormitory exit function mortise lock from the 7900 Series with rose trim and a single cylinder deadbolt - a corridor/dormitory function where the deadbolt is thrown from inside and retracts on egress. The ML2053 is Entrance/Office: latchbolt by grip either side, the outside grip locked or unlocked by key or thumbturn, inside grip always free. Both are Grade 1 mortise locks with a deadbolt; the dormitory function is the one to specify when the resident controls the deadbolt from inside the room.
    14) Can I use a Dormakaba Saffire LX-I-M002 in place of the ML2053 on a commercial entrance?
    The Dormakaba LX-I-M002 Saffire is an electronic RFID mortise lockset with BLE mobile access at BHMA Grade 2. The ML2053 is ANSI/BHMA Grade 1 per A156.13 Series 1000, operational and security Grade 1. If the specification on the opening calls for Grade 1, the Saffire does not meet it; where credential access matters more than the grade line, the Schlage LEMD-GRW is a Grade 1 ENGAGE wireless mortise lock with a 125kHz proximity reader and a 3 hour fire rating.
    15) Does the ML2053 need Corbin Russwin cylinders, or can I keep another manufacturer's key system?
    The ML2053 ships standard with a conventional 6-pin brass cylinder in the L4 keyway, 0-bitted, and it can be used with new or existing Corbin Russwin key systems while also accepting most other manufacturers' cylinders. It can also be ordered less cylinder, or with LFIC 6-pin or 7-pin less core for an interchangeable core system. Among the peers, the Cal-Royal NM8080 is a heavy duty Grade 1 storeroom mortise lockset offered with an interchangeable core option.
    16) Can an ML2053 go on an aluminum storefront or glass door?
    No - it is sized for a 1-3/4 inch (44mm) door with a 5-7/8 x 4 x 15/16 inch heavy-gauge steel lockcase, which a narrow stile storefront will not accept. For those 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.
    17) What is the difference between a mortise lock like the ML2053 and a cylindrical lockset for an office door?
    A mortise lock drops into a pocket routed into the door edge, so it carries a latchbolt and a separate deadbolt in one body: the ML2053 has a 3/4 inch anti-friction latch plus a 1 inch stainless deadbolt in a 5-7/8 x 4 x 15/16 inch case. A cylindrical lock bores through the face of the door and has no deadbolt in the same body, so you would add a separate deadbolt to get the same security. Pick mortise when the door is high traffic, needs a deadbolt and key or thumbturn control, or when the frame and door are already mortise prepped. Pick cylindrical when the door is bored, the traffic is lighter and a deadbolt is not needed; for a non-keyed bored opening, the Schlage PC10 Grade 1 passage cylindrical lock is that kind of part.
    18) What is the closest equivalent to the Corbin Russwin ML2053 from another brand?
    For the same job, a Grade 1 heavy duty entrance/office mortise lockset on a 1-3/4 inch door, the Cal-Royal NM8050 is the direct peer: Grade 1, entrance/office function, with an auxiliary deadlatch. Hager's 3800 Series covers the same opening in non-keyed variants, the 3850E office mortise lock with lever and escutcheon on a 2-3/4 inch backset for doors 1-3/4 to 2-1/2 inches. The Corbin Russwin differentiator is the multi-function lockbody and the trim range: one ML2054 body configures 12 functions, and the trim runs nine lever styles across two rose diameters and two escutcheons.
    19) Will the ML2053 hold up on a high traffic entrance door?
    It is built for it. The lockcase is heavy-gauge steel and the lock is UL cycle tested to 14.5 million cycles, verification ID V875753, against an ANSI/BHMA A156.13 Grade 1 operational and security rating. The two-piece latchbolt has an anti-friction insert so the door needs less force to close, which is what stops a busy door from being left standing open. Trim is thru-bolted rather than screwed to the face, so the levers stay aligned under abuse.
    20) Will the ML2053 lever match the other Corbin Russwin doors in my building?
    Very likely, if those doors are ML2000 Series. The lever, rose and escutcheon are ordered separately from the function, so the same Armstrong, Citation, Newport or Princeton lever and the same finish that is on your existing corridor doors can go on this entrance lock, giving one visual across office, storeroom and classroom openings even though the functions differ. Match the finish code exactly (626 satin chrome and 630 satin stainless look similar on a wall but are not the same finish) and match the trim family, A rose, F rose, M escutcheon or N escutcheon, to what is on the door now.
    21) Can I get the ML2053 with electric latch retraction or a keypad?
    No. The ML2053 is a mechanical lock with no electrified option in this configuration. Motorized Electric Latch Retraction is offered on the ML20900 series within the same ML2000 family, so an access controlled opening moves to that series rather than to this part. If you want standalone credential access on a mortise prep instead, the Dormakaba E-Plex 2066 Series electronic pushbutton keyless mortise lock and the Schlage CO-100 standalone electronic mortise lock with keypad reader are that kind of product, and for wired 12V/24V there is the BEST 45HW Series electromechanical mortise lock.
    22) How much room does the ML2053 need between the lever and the cylinder on the escutcheon?
    Center to center from the knob or lever to the cylinder is 3-5/8 inches (92mm), and lever to thumbturn is 2-7/16 inches (62mm). Those two dimensions are what you check against an existing escutcheon or an existing door face prep when you are swapping a lock into a door that is already drilled. The armored front is 8 x 1-1/4 inches in wrought brass, bronze or stainless. If the holes in the door do not fall on those centers, the door face needs re-prepping or filling, not just new trim.
    23) Which mortise cylinder do I need for the ML2053 if I order it less cylinder?
    A mortise cylinder with an A01 cloverleaf cam is the Corbin Russwin standard for the ML2000 lockbody. Corbin Russwin 1000 Series Grade 1 mortise cylinders come in 1-1/8, 1-1/4, 1-1/2 and 1-3/4 inch lengths with the A01 cam; length is chosen from door thickness and trim, with 1-1/8 and 1-1/4 inch covering most 1-3/4 inch doors and escutcheon trim taking the longer ones. For interchangeable core, the 1070 Series 6-pin mortise housing in 1-1/4 inch with the A01 cam takes the core. If your existing system is Schlage keyed, the 1000 Series is also offered in a 1-1/4 inch length with an A06 Schlage cloverleaf cam.
    24) Is there a non-keyed mortise lock in the same family of openings as the ML2053?
    For an opening that needs latching without a cylinder, the Falcon MA101 is a Grade 1 heavy duty mortise passage lock with field reversible operation and a fire rating, the Schlage PM010 is a Grade 1 non-keyed passage latch mortise lock for 1-3/4 inch doors, and the Hager 3850E is a Grade 1 office mortise lock with lever and escutcheon, non-keyed, on a 2-3/4 inch backset for doors 1-3/4 to 2-1/2 inch. The ML2053 is keyed with a single cylinder, conventional 6-pin L4 keyway, so those are the ones to specify when no key control is wanted at the door.
    25) I want keypad or credential access on the door instead of a keyed ML2053 - what mortise locks do that?
    Several Grade 1 mortise locks carry the reader on the lock. The Alarm Lock DL3500CR is a Grade 1 Trilogy electronic mortise lock with 300 user codes and a classroom function, the Schlage CO-100 is a Grade 1 standalone electronic mortise lock with a keypad reader in a privacy function for 1-3/4 inch doors, and the TownSteel FME-2000 is a Grade 1 heavy duty classroom mortise lockset with RFID. The Dormakaba E-Plex E5086 is a Grade 1 pushbutton and card back-to-back mortise lock. The ML2053 is a mechanical lockset - its custom field for Electronic reads No - so any of these is a change of system, not a trim swap.
    26) The door needs access control released from the security system - what mortise lock replaces the ML2053 there?
    For an electrified opening, the Schlage L9092EU with 03A trim is a heavy duty mortise lock with an electrically locked or unlocked outside lever, keyed outside, request to exit, running on 12/24VDC for 1-3/4 inch doors, and the Command Access ML190 Series is a heavy-duty motorized mortise lock with field selectable EL/EU operation on 24VDC in a storeroom function. The BEST 45HW is a heavy duty wired electromechanical mortise lock with 12V/24V operation. The ML2053 has no electrical operation on the lockbody itself.
    27) Is a Schlage L0170 the same thing as an ML2053 lever lockset?
    No. The Schlage L0170 is Grade 1 half dummy trim, a non-keyed mortise lever lock for 1-3/4 inch doors in a dummy function. It provides a lever to pull on and nothing else. The ML2053 is a keyed Grade 1 mortise entrance lockset with a 3/4 inch throw anti-friction latchbolt and a 1 inch stainless steel deadbolt. Order the L0170 only where you want matching trim on a leaf that does not latch.
    28) What mortise lock should I use on a behavioral health or ligature resistant opening instead of a lever lockset?
    Lever trim is the problem on those openings, so move to anti-ligature trim. The TownSteel MRX-L-01 is a Grade 1 heavy duty stainless steel anti-ligature lever mortise lockset in a passage function for 1-3/4 inch doors, the MRX-A-01 is the satin stainless arch trim passage version, and the Marks USA 5PDN is a Grade 1 hospital passage mortise push/pull paddleset that is ligature resistant and ADA compliant in satin stainless steel. The ML2053 is a lever lockset, though the ML2000 Series does include Behavioral Health BHSS and BLSS trim designs.
    29) I only need a deadbolt on the door, not an entrance lockset - what mortise options are there?
    The Sargent 4874 is a double cylinder mortise deadbolt on a 2-3/4 inch backset, the same backset the ML2053 uses, and the Alarm Lock DL4500 Series is a Grade 1 electronic mortise deadbolt with 2,000 user codes and a privacy keypad for doors 1-5/8 to 1-7/8 inch. The Kaba Ilco 185 Series is a no-handing mortise deadbolt. The ML2053 combines a 1 inch stainless steel deadbolt with a latchbolt and lever trim in one door preparation, so a deadbolt-only part is the choice when no latching is wanted.
    30) What is a field reversible mortise lock body alternative to the Corbin Russwin ML2053?
    The BEST 45H Series heavy duty mortise lock body is a public entrance function with field reversible operation, and the Falcon MA101 is a Grade 1 heavy duty mortise passage lock, also field reversible. The ML2053 is field reversible as well, using a patented Quick Reversible latchbolt that re-hands without disassembling the lock case, and it is a keyed Entrance/Office function - so it is the handing behavior these share, not the function.
    31) Is a Marks USA 21AC or 22AC ornamental iron mortise lock a substitute for an ML2053?
    No. The Marks USA 21AC and 22AC are entrance double cylinder ornamental iron mortise locks with a round knob, built for 1 inch thick doors. The ML2053 is designed for a 1-3/4 inch (44mm) door with a 5-7/8 x 4 x 15/16 inch lockcase. An ornamental iron gate or storefront door at 1 inch will not take the ML2053 case, and the 21AC and 22AC cannot fill an ML2053 pocket.
    32) Will an Alarm Lock Trilogy DL2700CR fit the same door as an ML2053?
    Check the door thickness first. The Alarm Lock DL2700CR is a Grade 1 Trilogy T2 electronic mortise lock with a classroom function and weatherproof design for doors 1-5/8 to 1-7/8 inch, as is the DL3500CR. The ML2053 is built for a 1-3/4 inch (44mm) standard door, which falls inside that band, so a 1-3/4 inch door suits both. The functions differ - classroom on the Trilogy against Entrance/Office on the ML2053 - and the Trilogy replaces key-only control with codes.
    33) Is a Schlage PC10 an alternative to the Corbin Russwin ML2053?
    Only if the door is prepped for a cylindrical lock. The Schlage PC10 is a Grade 1 passage cylindrical lock, non-keyed, with rose, for 1-3/4 inch doors - it mounts in a bored hole, not a mortise pocket. The ML2053 is a mortise lock with a 5-7/8 x 4 x 15/16 inch steel lockcase and an 8 x 1-1/4 inch armored front. The two door preparations are not interchangeable, and the PC10 has no keying. For a bored-prep door needing a mortise-style function, the prep itself has to be settled before the lock is chosen.
    34) I need a privacy function on a restroom or bedroom door - what takes the place of the ML2053?
    The Cal-Royal NM8440 is a heavy duty Grade 1 privacy mortise lockset with a deadbolt for 1-3/4 inch doors, and the Hager 3840S is a Grade 1 privacy mortise lock on a 2-3/4 inch backset for doors 1-3/4 to 2 inch - matching the ML2053's 2-3/4 inch backset. The ML2053 is a keyed Entrance/Office lockset, so it is not the part for an opening that needs occupant privacy with emergency release rather than key control.
    35) Is the Schlage LE Series LEBMB-ADD an equivalent to the ML2053 for an apartment or office door?
    They are graded differently. The Schlage LEBMB-ADD is a mobile-enabled mortise lock with push button and LED covering privacy, office and apartment functions, Grade 2, with a 3 hour fire rating for 1-3/4 inch doors. The ML2053 is ANSI/BHMA A156.13 Grade 1 and is UL10C listed for 3-hour fire doors up to 4 ft x 10 ft single or 8 ft x 10 ft pair. Both suit a 1-3/4 inch door; the LEBMB-ADD trades the key system for credentials and sits at Grade 2.
    36) Which mortise locks pair with an ML2053 opening if some doors in the building are Baldwin storeroom?
    The Baldwin 6310 is an entry/storeroom mortise lock body, knob by knob, on a 2-1/2 inch backset for doors 1-3/8 inch and over, with the 6310190RRLS the right hand reverse lever by lever version. Those run a 2-1/2 inch backset against the ML2053's 2-3/4 inch, so the two do not share a door prep and standardizing a building on one means committing to one backset. The ML2053 comes in 14 finishes from 605 Bright Brass through 630 Satin Stainless Steel and BSP Black Suede Powder Coat if the goal is matching appearance across mixed hardware.
    37) Is a Codelocks CL2255 a lower cost way to get the same thing as an ML2053?
    They are built for different service levels. The Codelocks CL2255 is a medium duty electronic tubular mortise latch in the CL2000 Series with a brushed steel finish. The ML2053 is ANSI/BHMA A156.13 Grade 1, operational and security Grade 1, with a heavy-gauge steel lockcase and UL cycle testing verified at 14.5 million cycles. On a high traffic commercial entrance the duty level is the deciding line, not the mounting style.
    38) Is there a Corbin Russwin mortise lock with a visual locked/unlocked indicator for a classroom or restroom?
    Status indicator options are offered within the ML2000 Series on sectional and escutcheon trim, giving staff a look-and-see of whether the door is secured, though the ML2053 entrance/office build is not itself an indicator lock. Behavioral Health trim (BHSS and BLSS) is also part of the series trim range for psychiatric and detention-adjacent openings. If you need indication from another brand, the Marks USA LA318GJ is a Grade 1 classroom security indicator mortise lockset 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.
    39) Can I change the ML2053 to a different function later without buying a whole new lock?
    Within the ML2000 Series, one ML2054 lockbody configures 12 functions, so a facility standardizing on the series can carry fewer lockbodies and change how an opening behaves rather than replacing it. Trim is separate from the body as well: replacement inside and outside levers, spindle assemblies, M and N escutcheons, wrought roses, thumbturn packets and armored fronts are all stocked as ML2000 parts, so a damaged lever or a bent front is a parts order, not a new lockset.
    How fast can I get the Corbin Russwin COR-ML2053-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-ML2053-NSA-626 come with a warranty?
    Absolutely. The Corbin Russwin COR-ML2053-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-ML2053-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-ML2053-NSA-626 from ZenSupply?
    ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.

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