Corbin Russwin Double Grade 1 ...
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$1,421.06
$831.23
Corbin Russwin Double Grade 1 Cylinder Mortise Lock, LW-Lustra Lever

Corbin Russwin Double Grade 1 Cylinder Mortise Lock, LW-Lustra Lever

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Model: ML2042-LWA-626
From the ML2000_Series Collection
$1,421.06
$831.23
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Selected Lever Type is
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,421.06
$831.23
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Corbin Russwin ML2042 Double Cylinder Mortise Lock, Entrance Function with LW-Lustra Lever, Grade 1

Commercial-Grade Entrance Mortise Lock with Patented Quick Reversible Latchbolt Technology

The Corbin Russwin ML2042 is a Grade 1 double cylinder mortise lock engineered for entrance and public restroom applications in high-traffic commercial, institutional, industrial, and government environments. Conforming to ANSI function F09, this lock allows latchbolt retraction by grip from either side unless the outside grip is locked by key from inside, with the inside grip always remaining free. Constructed of heavy-gauge steel with a 1" stainless steel deadbolt, the ML2042 is designed for 1-3/4" (44mm) standard door thickness and features a field-reversible handing mechanism. The ML2000 Series has been UL cycle tested to an exceptional 14.5 million cycles, delivering unmatched durability for demanding 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
  • Hotel and Hospitality Properties
  • Government and Municipal Buildings
  • Industrial and Institutional Facilities
  • Multi-Tenant Residential and Mixed-Use Properties

Tamper-Resistant Design

The ML2000VR (Vandal Resistant) Series variant features vandal-resistant stainless steel escutcheons with tapered edges and Torx® pin tamper-resistant screws, providing a formidable barrier against abuse and unauthorized access attempts. When paired with Corbin Russwin patented high-security Pyramid or Access 3® cylinders, the ML2042 delivers a comprehensive security solution for any commercial door opening.

Why Choose Corbin Russwin Quality?

Corbin Russwin ML2000 Series mortise locks are built to Grade 1 standards from heavy-gauge steel with a 1" stainless steel deadbolt, and have been UL cycle tested to an extraordinary 14.5 million cycles (Verification ID: V875753), far exceeding standard commercial requirements. The ML2042 is backed by a 10-year warranty and features a patented Quick Reversible latchbolt design, delivering the versatility, reliability, and long-term value demanded by offices, schools, hospitals, hotels, and other high-use commercial applications.

Manufacturer Resources

Key Systems Catalog

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"
Product Subgroup:
Mortise Lock Bodies
Product Type:
Mortise Locks
Commercial/Residential:
Commercial
Lock Type:
Mortise
Lock Function:
Entrance
Product Attribute:
Mortise Locks
Electronic:
No
Product Model:
ML2042
Collection:
ML2000_Series
Product Function:
Entrance
Door Hand Direction:
Field Reversible
Door Thickness Range:
1-3/4"
Product Substrate:
Brass or Bronze
Product Category:
Mechanical Locks
Department:
Door Hardware

Corbin Russwin ML2042-LWA-626 – Frequently Asked Questions

1) Do I need to order a left hand or right hand ML2042?
No. Handing is sorted in the field. The ML2042 uses Corbin Russwin's patented Quick Reversible latchbolt, so you flip the hand without opening the lock case or disassembling anything. One part number covers all four hands, which is the reason property managers and facility shops stock it as a single SKU across a building.
2) Can I use the ML2042 on a fire rated door?
Yes. The ML2000 Series is UL and cUL listed with 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 carries California State Fire Marshal listing and windstorm/hurricane certification, which matters if you're specifying into a coastal jurisdiction.
3) Will the ML2042 latch into the strike already in my frame?
Depends what's in there. The ML2042 ships with an ANSI straight lip strike, 4-7/8 x 1-1/4 inches with 1-1/8 inch lip to center, and the latchbolt is a two-piece anti-friction unit with 3/4 inch (19mm) throw. If your frame already has an ANSI 4-7/8 strike prep from another Grade 1 mortise lock, it drops in. If the frame was prepped for a T-strike or a cylindrical lock, the frame needs reworking. The 1 inch deadbolt throw also needs a deep enough strike pocket.
4) Can I key the ML2042 into my existing building master key system?
Yes. The ML2042 works with new or existing Corbin Russwin key systems and accepts most other manufacturers' cylinders, so you can bring it onto whatever system the rest of the building runs. Standard cylinder is brass, 6-pin, L4 keyway, shipped 0-bitted for the locksmith to pin. For higher security openings it takes Corbin Russwin patented Pyramid or Access 3 cylinders.
5) What is the closest Grade 1 entrance mortise lock to the Corbin Russwin ML2042 from another manufacturer?
The Cal-Royal NM8050 is the nearest direct counterpart. It is a heavy duty Grade 1 mortise lockset with an entrance/office function and a 1-3/4 inch door thickness, matching the ML2042's Grade 1 rating, entrance function, and 1-3/4 inch standard door thickness. The ML2042 differs in that it is a double cylinder F09 entrance lock with a 1 inch stainless steel deadbolt and a quick reversible latchbolt that re-hands without opening the case.
6) I need a storeroom function instead of entrance in a mortise lock. What should I order?
Two Grade 1 storeroom mortise locks cover that opening. The Accentra 8805FL is a Grade 1 storeroom mortise lock in the 8800 Series with an Arcadia lever, and the Cal-Royal NM8080 is a heavy duty Grade 1 storeroom mortise lockset for 1-3/4 inch doors with an interchangeable core option. Storeroom keeps the outside lever locked at all times with key retraction, where the Corbin Russwin ML2042 is an ANSI F09 entrance lock whose outside grip is locked by key from the inside.
7) The Sargent 4874 is also a double cylinder mortise unit. Is it a substitute for the ML2042?
No. The Sargent 4874 is a double cylinder mortise deadbolt with a 2-3/4 inch backset in the 4870 Series. It throws a bolt only and has no latchbolt or lever trim, so it cannot operate a door on its own. The Corbin Russwin ML2042 is a full entrance lockset combining a 3/4 inch throw anti-friction latchbolt operated by the Lustra lever with a separate 1 inch stainless steel deadbolt in one case.
8) Can I use the Baldwin 6301 in place of the Corbin Russwin ML2042?
Only if the door is prepped for it. The Baldwin 6301 is an entry/apartment mortise lock body with a 2-1/2 inch backset for doors 1-3/4 inches and over, available knob by knob or as the 6301LS lever by lever. The Corbin Russwin ML2042 uses a 2-3/4 inch backset, so the cross bore and case pocket locations differ and the two are not a drop-in swap for each other.
9) Will a Marks USA 21AC or 22AC work in place of the ML2042 on a storefront style door?
Not on a standard commercial wood or hollow metal door. The Marks USA 21AC and 22AC are entrance double cylinder ornamental iron mortise locks with a round knob, both built for a 1 inch door thickness. The Corbin Russwin ML2042 is specified for a 1-3/4 inch standard door with a 2-3/4 inch backset and a 5-7/8 by 4 by 15/16 inch lockcase, so it will not fit a 1 inch narrow iron stile.
10) What size mortise pocket do I need to cut for the ML2042 lock case?
The heavy-gauge steel lockcase measures 5-7/8 x 4 x 15/16 inches (149 x 102 x 24mm), and the armored front is 8 x 1-1/4 inches. Trim spacing is 3-5/8 inches (92mm) center to center from lever to cylinder, and 2-7/16 inches (62mm) lever to thumbturn, so template your face bores off those figures.
11) What lever and rose comes on this Corbin Russwin ML2042?
This configuration is the LW Lustra wrought lever on an A rose, 2-1/4 inch diameter, in 626 satin chrome. The ML2000 Series trim range is much wider if you need to match existing openings, including Museo, Vineyard, and Behavioral Health (BHSS/BLSS) trim, plus status indicator trim on sectional and escutcheon designs. Trim is thru-bolted for alignment and security.
12) Is a double cylinder entrance mortise lock the right choice, or should I use a storeroom function?
Use the ML2042 where someone on the inside needs to control whether the outside lever is locked, and where a key-operated deadbolt is wanted from both sides. Choose a storeroom function instead if the outside lever should be locked at all times with key-only entry and no one deciding day to day, such as an equipment or utility room. ZenSupply carries storeroom mortise locks including the Accentra 8805FL with Arcadia lever and the Cal-Royal NM8080 with interchangeable core option. Before specifying a double cylinder deadbolt on an egress door, check your local code, since some jurisdictions restrict key-operated locking on the egress side.
13) What are the Grade 1 durability numbers behind the ML2042?
ANSI/BHMA A156.13 Series 1000, Operational and Security Grade 1, plus ADA A117.1. Beyond the standard, the ML2000 Series has been UL cycle tested to 14.5 million cycles under Verification ID V875753. Case is heavy-gauge steel with a one-piece stainless steel deadbolt and a 9/16 inch effective throw deadlocking auxiliary latch. That cycle figure is the argument for putting it on a high-traffic entrance where a Grade 2 lock would be back on the maintenance list.
14) What Grade 1 mortise entrance locks does ZenSupply carry besides the Corbin Russwin ML2042?
For a mechanical Grade 1 entrance mortise lock, the Cal-Royal NM8050 is an office/entrance lockset with auxiliary deadlatch built for 1-3/4 inch doors. The BEST 45H Series public entrance lockbody is another field reversible option. If your opening is a wood or ornamental residential-style door, Baldwin's 6301 lever by lever entrance/apartment mortise body uses a 2-1/2 inch backset rather than 2-3/4, so it is not a straight swap into a commercial ANSI prep.
15) Is the ML2042 available with electric latch retraction or access control?
Not as this lock. The ML2042 is a mechanical, non-electronic lock body. Motorized Electric Latch Retraction (MELR) is offered on the Corbin Russwin ML20900 series instead. If you need credential-based access on a mortise prep, ZenSupply carries electronic mortise locks such as the TownSteel FME-2000 Grade 1 RFID lockset for 1-3/4 inch doors and the Schlage CO-100 standalone keypad mortise lock.
16) If I standardize on the ML2000 Series across a building, can one lock body cover different room functions?
Largely, yes. The ML2000 Series is multi-function: 12 functions are configurable from a single ML2054 lock body, so a facility can stock fewer bodies and set the function at install. The ML2042 itself is the F09 entrance configuration. Handing is also field reversible, which further cuts what you need on the shelf.
17) Is there a simpler non-keyed mortise lock if I do not need the double cylinder on the ML2042?
Yes. The Schlage PM010 is a Grade 1 non-keyed passage latch mortise lock for 1-3/4 inch doors, and the Falcon MA101 is a Grade 1 heavy duty mortise passage lock in the MA Series that is field reversible and fire rated. Hager also offers the 3810S passage mortise lock with rose and a 2-3/4 inch backset, matching the 2-3/4 inch backset of the Corbin Russwin ML2042. Passage locks have no cylinder and no deadbolt, so they secure nothing.
18) What is the difference between the ML2042 and the Emtek 3102 Memphis mortise entrance lockset?
The Emtek 3102 Memphis is a dummy function mortise entrance lockset, meaning the trim is fixed and there is no working latch or cylinder. It suits an inactive leaf or a pull-only door. The Corbin Russwin ML2042 is a fully operating ANSI/BHMA Grade 1 double cylinder entrance mortise lock. The Emtek 3104 Hamilton, 3106 Manhattan, and 3019 Brisbane are dummy function units as well.
19) We want keypad access on this opening instead of a keyed entrance lock. What mortise locks should we look at?
Several electronic mortise locks cover that. The Alarm Lock DL3500CR is a Grade 1 Trilogy electronic mortise lock with 300 user codes and classroom function for doors 1-5/8 to 1-7/8 inches thick, and the Schlage CO-100 is a Grade 1 heavy duty standalone electronic mortise lock with a keypad reader in a privacy function for 1-3/4 inch doors. The BEST 45HZ EZ Series is an electronic keypad mortise lock with key override. Note the Alarm Lock door range stops at 1-7/8 inches, while the Corbin Russwin ML2042 is built for a 1-3/4 inch standard door and is not electronic.
20) For a behavioral health or ligature resistant opening, what replaces the ML2042?
Look at the TownSteel MRX-L-01, a stainless steel Grade 1 heavy duty anti-ligature lever mortise lockset in passage function for 1-3/4 inch doors, or the MRX-A-01, the same passage function with satin stainless ligature resistant arch trim. For a push/pull opening, 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. All three are passage function, so unlike the keyed ML2042 they provide no locking.
21) Which mortise lock should I use for a dormitory or corridor door rather than an entrance door?
The Sargent 7925 is a Grade 1 heavy duty dormitory exit function mortise lock in the 7900 Series with rose trim and a single cylinder deadbolt. It differs from the Corbin Russwin ML2042 in that the ML2042 is a double cylinder entrance lock keyed on both sides. Another corridor option is the BEST 45HCA public entrance lockbody, a heavy duty field reversible mortise lock body, matching the field reversible handing of the ML2042.
22) We need privacy with a deadbolt on a restroom door. Is the ML2042 the right lock, or is there a better fit?
For a true privacy function, the Cal-Royal NM8440 is a heavy duty Grade 1 privacy mortise lockset with deadbolt for 1-3/4 inch doors, and the Hager 3840S is a Grade 1 privacy mortise lock with a 2-3/4 inch backset for doors 1-3/4 to 2 inches. The Corbin Russwin ML2042 is an ANSI F09 double cylinder entrance lock, which is used for public restrooms where key control from the outside is wanted rather than an inside thumbturn.
23) If the opening needs electrified access control, what mortise lock replaces the ML2042?
The Schlage L9092EU with 03A trim is a heavy duty electric lock/unlock outside lever mortise lock for 1-3/4 inch doors, keyed outside with request to exit and 12/24VDC operation. The Command Access ML190 is a heavy-duty motorized mortise lock in storeroom function with field selectable EL/EU operation on 24VDC, and the BEST 45HW is a wired electromechanical mortise lock with 12V/24V operation. The Corbin Russwin ML2042 itself is a mechanical lock.
24) Is the Dormakaba E-Plex E5086 a comparable double-sided lock to the ML2042?
Both are Grade 1 mortise locks with credential control on both sides of the door, but the mechanism differs. The E-Plex E5086 is an entry/egress electronic pushbutton and card back to back mortise lock in the 5X86 Series, so both sides are controlled by code or card. The Corbin Russwin ML2042 is a mechanical double cylinder lock keyed on both sides with a 6-pin L4 keyway, 0-bitted standard, and it accepts most other manufacturers' cylinders.
25) Is there a vandal resistant version of the ML2042 for abusive or behavioral health openings?
Yes. The ML2000VR variant uses vandal resistant stainless steel escutcheons with tapered edges and Torx pin tamper-resistant screws. The series also offers Behavioral Health trim (BHSS/BLSS). For ligature resistant openings specifically, ZenSupply also stocks the TownSteel MRX-L-01 stainless Grade 1 anti-ligature lever mortise lockset and the Marks USA 5PDN Grade 1 hospital passage push/pull paddleset.
26) What material is the ML2042 armored front and strike, and can I match it to the door's other hardware?
Armored front and strike are supplied in wrought brass, bronze, or stainless steel, with the lock body itself heavy-gauge steel and trim substrate brass or bronze. This configuration is finished 626 satin chrome, which is the common commercial finish and pairs with 630 stainless trim on adjacent openings without looking out of place.
How fast can I get the Corbin Russwin ML2042-LWA-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 ML2042-LWA-626 come with a warranty?
Absolutely. The Corbin Russwin ML2042-LWA-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 ML2042-LWA-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 ML2042-LWA-626 from ZenSupply?
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