Corbin Russwin ML20915 Grade 1...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,838.27
$1,077.40
Corbin Russwin ML20915 No Cylinder Override, Mortise Electrified Lever Lockset, LS-Lustra Lever

Corbin Russwin ML20915 Grade 1 No Cylinder Override, Mortise Electrified Lever Lockset, LS-Lustra Lever

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Model: ML20915-LSA-626-SAF
From the ML2000 Series Collection
$1,838.27
$1,077.40
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Corbin Russwin ML20915-LS Mortise Electrified Lever Lockset with Lustra Lever, No Cylinder Override, Fail Safe/Fail Secure

Commercial-Grade Electrified Mortise Security for High-Traffic Applications

The Corbin Russwin ML20915-LS is a heavy-duty mortise electrified lever lockset from the ML2000 Series, featuring the Lustra (LS) lever design and No Cylinder Override configuration with selectable Fail Safe (SAF) and Fail Secure (SEC) operation. Built to ANSI/BHMA A156.13 Series 1000 Operational and Security Grade 1 standards, this lockset is constructed of heavy-gauge steel and accommodates door thicknesses from 1-3/8" to 4" with a standard backset of 2-3/4" and a 3/4" latchbolt throw. UL listed, UL10c compliant, and rated for use on fire doors up to and including 3-hour fire ratings, the ML20915-LS integrates seamlessly with access control platforms and Corbin Russwin key systems including the patented Access 3® and Pyramid high-security systems.

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
  • Healthcare Institutions and Medical Facilities
  • Educational Facilities and Campus Buildings
  • Government and Municipal Buildings
  • Retail Establishments and Mixed-Use Properties
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential and Hospitality Properties

Why Choose Corbin Russwin Quality?

Corbin Russwin ML2000 Series mortise locksets are engineered from heavy-gauge steel to far exceed ANSI/BHMA A156.13 Series 1000 Grade 1 requirements, ensuring durability and longevity in high-traffic, abusive environments. The ML20915-LS is backed by a ten-year mechanical warranty, a five-year MELR warranty, and a two-year electrical warranty, reflecting Corbin Russwin's commitment to long-term reliability. With UL listing, UL10c and UL 294 compliance, ADA conformance, and EcoFlex® technology delivering up to 89% energy savings, this electrified mortise lockset delivers professional-grade security performance for the most demanding commercial applications.

Product Specs

Subcategory:
Mortise Locks
Product Group:
Mechanical Locks
Series:
ML2000 Series
Standard Latch:
3/4" Latchbolt
Standard Strike:
ANSI-Straight Lip,1-1/8" (29mm) Lip to Center
Product Subgroup:
Mortise Lockset
Product Type:
Mortise Locks
Commercial/Residential:
Commercial
Lock Type:
Mortise
Lock Function:
Fail Safe/Fail Secure
Product Model:
ML20906
Collection:
ML2000 Series
Product Function:
Fail Safe/Fail Secure
Door Hand Direction:
Field Reversible
Door Thickness Range:
1-3/4"
Product Substrate:
Steel
Product Category:
Mechanical Locks
Backset (Distance):
2-3/4"
Department:
Door Hardware

Corbin Russwin ML20915-LSA-626-SAF – Frequently Asked Questions

1) Will the ML20915 lockset 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 ML20915 mortise lockset is built for 1-3/4 inch doors with a 2-3/4 inch backset, and the heavy-gauge steel lockcase measures 5-7/8 x 4 x 15/16 inches, so the door needs a standard commercial mortise pocket. The description also notes thicker doors can be accommodated with optional thickness, up to 4 inches.
2) Do I have to order the ML20915 handed, or can it be reversed in the field?
Order it and re-hand it on site. The ML20915 uses Corbin Russwin's Quick Reversible latchbolt, so the handing flips without taking the lock case apart, and the lock is listed as field reversible. That matters if you are stocking spares for a building with both hands of door: one part number covers both.
3) Can this electrified mortise lock go on a 3-hour fire rated door?
Yes. The ML20915 is UL/cUL listed and UL10C positive pressure rated for fire doors up to and including 3 hours, covering a single door up to 4 ft by 10 ft or a pair up to 8 ft by 10 ft. It also conforms to ADA A117.1 and carries California State Fire Marshal and windstorm/hurricane certification, which is what an institutional spec usually needs settled.
4) What does No Cylinder Override mean on the ML20915, and is there any key access?
No Cylinder Override means the lockset is not prepped for a key cylinder on the electrified side, so entry control is entirely through the access control system, not a key. If you need a mechanical key bypass for when the system or power is down, this is the wrong configuration and you want a cylinder-override version of the ML20900 electrified family instead.
5) Will the ML20915 latch into an existing ANSI strike, or do I need to change the frame prep?
It 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 throws 3/4 inch. If your frame already has a standard ANSI mortise strike cutout, the prep carries over. The two-piece latchbolt has an anti-friction insert so it takes less force to close against a closer, and the auxiliary latchbolt deadlocks with a 9/16 inch effective throw.
6) Should I use an electrified mortise lock like this or a standalone keypad or RFID mortise lock?
An electrified mortise lock like the ML20915 has no reader or credential of its own, it just takes lock/unlock commands from a wired access control system, so it needs power and a transfer hinge or door loop run to the opening. If you have no wiring and no head-end, a standalone lock is the simpler path: the Alarm Lock DL3500CR Trilogy is a Grade 1 keypad mortise lock with 300 user codes and classroom function, and the TownSteel FME-2000 is a Grade 1 classroom mortise lockset with RFID. Where you already have a panel and want real-time control and audit, the wired electrified lock is the right type.
7) What is the closest alternative to a Corbin Russwin ML20915 from another brand?
For a wired electrified mortise lock with selectable fail safe or fail secure operation, look at the Command Access ML190 Series, a heavy-duty motorized mortise lock with field selectable EL/EU operation on 24VDC, or the BEST 45HW Series wired electromechanical mortise lock which runs 12V or 24V. The Schlage L9092EU with 03A trim is a comparable electrified corridor-function mortise lock for 1-3/4 inch doors with request-to-exit and 12/24VDC, though that one is keyed on the outside rather than a no-override configuration like the ML20915.
8) If the door has no access control wiring, what mortise lock can I use in place of the ML20915-LS?
For an unwired opening, standalone electronic mortise locks are the alternative: the Alarm Lock DL3500CR is a Grade 1 electronic mortise lock with 300 user codes in a classroom function for 1-5/8 to 1-7/8 inch doors, and the Schlage CO-100-MS-40-KP is a Grade 1 standalone electronic mortise lock with a keypad reader in a privacy function for 1-3/4 inch doors. The ML20915-LS is a hardwired electrified lockset selectable Fail Safe or Fail Secure and depends on a power supply and access control system.
9) What is a simpler mechanical alternative to the Corbin Russwin ML20915-LS for a door that does not need electric control?
Mechanical Grade 1 mortise locksets cover that. The Cal-Royal NM8080 is a heavy duty Grade 1 storeroom mortise lockset with an interchangeable core option for 1-3/4 inch doors, the NM8050 is the Grade 1 office/entrance version with an auxiliary deadlatch, and the Accentra 8805FL is a Grade 1 storeroom mortise lock with an Arcadia lever. All three are key-operated only; the ML20915-LS adds selectable Fail Safe or Fail Secure electrified operation and comes in a no cylinder override configuration.
10) What looks like a substitute for the ML20915-LS but will not secure the door?
Several mortise-family items in the same size class do not lock. The Schlage L0170 is a Grade 1 half dummy trim with no keying and no latch, the Falcon MA101 is a Grade 1 heavy duty passage lock that is always free, the Schlage PM010 is a Grade 1 non-keyed passage latch, and the Hager 3810S and 3810E are passage mortise locks on a 2-3/4 inch backset. None of them can be held locked or released electrically the way the Corbin Russwin ML20915-LS is, which is selectable Fail Safe or Fail Secure.
11) Is there a wireless mortise lock alternative to the ML20915-LS for a retrofit where pulling wire is not practical?
Yes. The Alarm Lock DL1300NW Trilogy Networx is a wireless electronic mortise lock with a keypad made for Adams Rite deadlatches, and the Schlage LEMD-GRW is a Grade 1 ENGAGE series wireless mortise lock with a 125kHz proximity reader and mobile enabled deadbolt with LED on Greenwich trim, right hand, with a 3 hour fire rating. The Corbin Russwin ML20915-LS requires hardwired power for its Fail Safe or Fail Secure operation.
12) What is Request to Exit monitoring and do I need it on this lockset?
Request to Exit (RX) is a switch inside the lock that signals your access control panel when the inside lever is turned, so a legitimate exit does not trip a door alarm and the event gets logged. The ML20915 is offered with RX and without it. Specify RX if the opening is alarmed, monitored, or tied to an audit trail; skip it on a simple locked/unlocked door.
13) What trim options do I choose from when ordering the ML20915-LS?
Twelve orderable combinations in all. The lever is the cast Lustra (LS) design in 626 satin chrome, and you pick the trim style as A rose, M escutcheon, or N escutcheon, then Fail Safe or Fail Secure, then RX monitoring yes or no. Rose trim is the lower-profile look; the M and N escutcheons give a full plate, which is also where Corbin Russwin's locked/unlocked status indicator options live.
14) Can I use my existing Corbin Russwin keys and cylinders with the ML2000 mortise locks?
ML2000 Series locks work with new or existing Corbin Russwin key systems, including the patented Access 3 and Pyramid high-security systems, and the series accepts most other manufacturers' cylinders. Standard cylinder is brass, 6-pin L4 keyway, 0-bitted. Note that the ML20915 itself is the No Cylinder Override configuration, so keying applies to the other ML2000 openings you are standardizing alongside it.
15) Is this mortise lockset heavy duty enough for a high-traffic school or hospital corridor?
It is built to ANSI/BHMA A156.13 Series 1000, Operational and Security Grade 1, which is the highest commercial rating for mortise locks, with a heavy-gauge steel lockcase and a wrought brass, bronze or stainless armored front measuring 8 x 1-1/4 inches. Corbin Russwin publishes a UL cycle result of 14.5 million cycles on the series, verification ID V875753. That is the traffic level of a main corridor or a campus entry.
16) If I need electric latch retraction instead of a locked lever, does the ML20900 family cover that?
Yes. Motorized Electric Latch Retraction (MELR) is available on the ML20900 electrified series, which pulls the latch back so the door pushes open freely, typically for automatic operators or hands-free openings. The ML20915 as configured controls the outside lever rather than retracting the latch, so if the job calls for a low-energy operator you should specify the MELR option.
17) Does the ML20915 have a deadbolt, and what are the trim hole spacings for the door prep?
The ML2000 lockcase carries a one-piece stainless steel deadbolt measuring 19/32 x 1-1/4 inches with a 1 inch throw. For prep layout, center to center from the knob or lever to the cylinder is 3-5/8 inches, and lever to thumbturn is 2-7/16 inches. Use those with the 2-3/4 inch backset when you lay out or verify an existing mortise pocket.
18) Will a Dormakaba E-Plex or Saffire mortise lock do the same job as the Corbin Russwin ML20915-LS?
They are different control models. The Dormakaba E-Plex E5086 is a Grade 1 electronic pushbutton and card back to back mortise lock, and the Saffire LX-I-M002 is an electronic RFID mortise lockset with BLE mobile access at BHMA Grade 2 - both make access decisions at the door with onboard credentials. The ML20915-LS is a hardwired electrified lockset whose Fail Safe or Fail Secure state is driven by an external access control system and power supply.
19) Can I use a Sargent 4874 mortise deadbolt or Kaba Ilco 185 in place of the ML20915-LS?
No. The Sargent 4874 is a double cylinder mortise deadbolt on a 2-3/4 inch backset and the Kaba Ilco 185 series is a no-handing mortise deadbolt - both are deadbolt-only bodies with no lever operation and no electrical control. The Corbin Russwin ML20915-LS is a lever lockset with a 3/4 inch latchbolt and selectable Fail Safe or Fail Secure electrified operation, so a deadbolt cannot take its place on a latched, access-controlled opening.
20) For a behavioral health or ligature resistant opening, what mortise lockset should I look at instead of the ML20915-LS?
TownSteel offers dedicated anti-ligature bodies: the 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. The Corbin Russwin ML20915-LS is an electrified Fail Safe or Fail Secure lockset built on a 2-3/4 inch backset.
21) How does the Baldwin 6310 mortise lock compare with the Corbin Russwin ML20915-LS for backset?
The Baldwin 6310 entry/storeroom mortise lock body uses a 2-1/2 inch backset and fits doors 1-3/8 inch and over, as does the 6310190RRLS right hand reverse lever version. The Corbin Russwin ML20915-LS uses a 2-3/4 inch backset, so the two are not interchangeable in an existing mortise pocket without repreparing the door.
22) Can I match the lever style across the building if some doors only need mechanical locks?
The Lustra (LS) cast lever on the ML20915 is one of the ML2000 Series trim designs, and the same series offers Museo, Vineyard, and Behavioral Health (BHSS/BLSS) trims, so mechanical and electrified openings can carry the same lever and rose or escutcheon across a facility. Trim is thru-bolted on ML2000 designs, which keeps alignment consistent door to door. Ordered here in 626 satin chrome.
How fast can I get the Corbin Russwin ML20915-LSA-626-SAF 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 ML20915-LSA-626-SAF come with a warranty?
Absolutely. The Corbin Russwin ML20915-LSA-626-SAF 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 ML20915-LSA-626-SAF?
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
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