Corbin Russwin ML20915 Grade 1...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,042.47
$755.45
Corbin Russwin ML20915 Fail Safe Electrified Mortise Lock, Both Grips Locked when Not Energized, No Cylinder Override, Lever x Lever Body Only

Corbin Russwin ML20915 Grade 1 Fail Safe Electrified Mortise Lock, Both Grips Locked when Not Energized, No Cylinder Override, Lever x Lever Body Only

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Model: ML20915-LL-626-SAF
From the ML2000_Series Collection
Selected Finish is

In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,042.47
$755.45
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Corbin Russwin ML20915 Fail Safe Electrified Mortise Lock Body, Both Grips Locked When Not Energized, Lever x Lever, Field Reversible

Grade 1 Commercial Electrified Mortise Lock Body for High-Traffic Applications

The Corbin Russwin ML20915 is a Fail Safe electrified mortise lock body from the ML2000 Series, engineered for demanding commercial, institutional, industrial, and government applications. In this fail safe configuration, both grips are locked when the lock is not energized, with no cylinder override, providing controlled access through lever x lever trim. Constructed of heavy-gauge steel with a 3/4" latchbolt and a 1" stainless steel deadbolt, this lockbody is designed for 1-3/4" (44mm) standard door thickness and features field-reversible handing. The ML2000 Series has been UL cycle tested beyond 14.5 million cycles (Verification ID: V875753), making it an exceptional choice for high-use environments such as offices, schools, hospitals, and hotels.

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 Warehouse Facilities
  • Government and Municipal Buildings
  • Multi-Tenant Residential and Institutional Properties

Why Choose Corbin Russwin Quality?

Corbin Russwin ML2000 Series mortise lock products deliver professional-grade reliability through heavy-gauge steel construction and a patented Quick Reversible latchbolt, with UL cycle testing verified beyond 14.5 million cycles (Verification ID: V875753). The ML20915 is backed by a 10 Year Limited warranty, providing long-term confidence for facility managers and security professionals. Engineered for the most demanding commercial applications, the ML2000 Series offers the versatility, durability, and security performance required in offices, schools, hospitals, and high-traffic institutional environments.

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"
Warranty:
10 Year Limited
Product Subgroup:
Mortise Lock Bodies
Product Type:
Mortise Lockbody Only
Commercial/Residential:
Commercial
Function Description:
Mortise Lockbody Only
Lock Type:
Mortise
Lock Function:
Fail Safe
Product Attribute:
Mortise Locks
Electronic:
No
AMP Draw:
500mA Peak, 15mA Holding
Product Model:
ML20915
Collection:
ML2000_Series
Product Function:
Fail Safe
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 ML20915-LL-626-SAF – Frequently Asked Questions

1) What happens to a Corbin Russwin ML20915 mortise lock when the power drops?
Both grips lock when the ML20915 is not energized, and there is no cylinder override, so a key will not get you through that door on a power loss. That is the fail safe configuration of this lockbody. If your opening needs mechanical key access during a power failure, this is the wrong function and you want a different ML20900 electrified function.
2) What voltage draw do I need to plan for on the ML20915 electrified mortise lock?
Budget 500mA peak and 15mA holding per lock when sizing the power supply and the door loop for the ML20915. Peak is the inrush at the moment the solenoid pulls; holding is the continuous load, and since this is a fail safe function it draws that holding current the whole time the door is meant to be unlocked.
3) Will the ML20915 mortise lock fit a 1-3/4 inch commercial door?
Yes. 1-3/4 inches (44mm) is the standard door thickness for the ML20915, with optional thicknesses available, and the lockcase is 5-7/8 x 4 x 15/16 inches with a 2-3/4 inch backset. That is standard commercial mortise prep, so it drops into an existing ANSI mortise pocket cut to those dimensions.
4) Do I have to order the ML20915 handed, or can it be reversed on site?
Handing is field reversible. The ML2000 patented Quick Reversible latchbolt lets you re-hand the lock without opening the lock case, so one lockbody covers left and right hand openings. Useful when you are stocking spares for a building with mixed swings.
5) Will the ML20915 latch into the strike that is already in my frame?
The latchbolt has a 3/4 inch (19mm) throw with a two-piece anti-friction insert, plus a 9/16 inch deadlocking auxiliary latch. Standard strike supplied is an ANSI straight lip, 4-7/8 x 1-1/4 inches with 1-1/8 inch lip to center. If your frame already has an ANSI 4-7/8 strike prep with that lip projection, the ML20915 lines up; a box strike with a shallower pocket will not take the 1 inch deadbolt throw.
6) Is this a complete lockset or just the lock body?
Body only. The ML20915 is a mortise lockbody, so levers, roses or escutcheon trim, and the cylinder are all ordered separately. Lever x lever trim is what this function is built around. Plan the trim, cylinder, and any status indicator into the same order or the door does not go together.
7) Can I keep my existing keyway with a Corbin Russwin ML20915?
The ML2000 lockbody works with new or existing Corbin Russwin key systems and accepts most other manufacturers' cylinders, so a building already keyed on another brand's mortise cylinder can usually stay on that keyway. The standard Corbin Russwin cylinder is brass, 6-pin L4 keyway, 0-bitted. Note that on the fail safe ML20915 there is no cylinder override, so the cylinder is not a power-loss workaround.
8) Can the ML20915 go on a fire rated door in a hospital or school corridor?
Yes. The ML2000 Series is UL/cUL listed and UL10C positive pressure rated for 3-hour fire doors up to 4 x 10 feet single or 8 x 10 feet pair, and it meets ADA A117.1, California State Fire Marshal, and Windstorm/Hurricane certification. It is also ANSI/BHMA A156.13 Series 1000 Grade 1 for both operational and security, with UL cycle testing beyond 14.5 million cycles.
9) If the opening does not need an electrified lock, what mortise lock body can I use instead of the Corbin Russwin ML20915?
The Accentra 8800FL Series Grade 1 mortise lock body with field reversible handing is a mechanical, non-electrified lock body option. The ML20915 is a Fail Safe electrified mortise lock body that draws 500mA peak and 15mA holding, so it needs power run to the door and both grips are locked when it is not energized. On an opening with no access control wiring, the Accentra 8800FL body covers the same Grade 1 mortise function without a power supply or transfer hinge.
10) What does Request to Exit monitoring add on the ML20915, and do I need it?
Request to Exit is an ordering option on the ML20915, available as Yes or No across every finish offered. With RX, the lockbody reports inside lever movement back to the access control panel so the system knows an egress was legitimate rather than a forced door. Specify it when the opening is tied to a door position switch and alarm, and skip it on a plain electrified access door.
11) I need electric latch retraction, not fail safe locking. Does the ML20915 do that?
No. The ML20915 controls the grips, not the latch. Motorized Electric Latch Retraction (MELR) is a separate option within the ML20900 electrified series, so order an MELR-configured lockbody if the requirement is to pull the latch back and hold the door on push-pull free operation.
12) Is the Accentra 8800FL mortise lock body an equal-grade alternative to the Corbin Russwin ML20915?
Both are ANSI/BHMA Grade 1 mortise lock bodies, and both are field reversible for handing, so either can be handed on site without ordering left and right versions. The difference is electrification: the ML20915 is an electrified Fail Safe body that locks both grips when power is removed, while the Accentra 8800FL Series body is a mechanical lock body. Match on grade, but confirm which one the door schedule calls for before substituting.
13) I need request-to-exit monitoring on the door - does a standard mortise lock body like the Accentra 8800FL cover that?
No. The Accentra 8800FL Series is a mechanical Grade 1 mortise lock body and carries no monitoring switch. The Corbin Russwin ML20915 is ordered with request-to-exit monitoring as an option, so if the access control system needs an REX signal from the lever, specify the ML20915 with that option selected rather than a standard mechanical body.
14) Does the lock body finish matter if the trim covers it?
It does for the armored front, which is the visible edge plate on the door. The ML20915 is offered in 605 bright brass, 606 satin brass, 611 bright bronze, 612 satin bronze, 613 and 613E oil-rubbed and dark oxidized bronze, 618 bright nickel, 619 satin nickel, 625 bright chrome, 626 satin chrome, 629 and 630 stainless, 722 black oxidized bronze oil-rubbed, and BSP black suede powder coat. Match it to the lever trim you are ordering so the edge does not read off against the face hardware.
15) Is there a way for staff to see whether the door is locked from the corridor?
Status indicator options are available on the ML2000 Series for locked/unlocked visibility, offered with sectional and escutcheon trim. Since trim is ordered separately from the ML20915 lockbody, the indicator gets specified with the trim, not the body. Trim ranges include Museo, Vineyard, and Behavioral Health BHSS/BLSS designs for psychiatric and patient room work.
How fast can I get the Corbin Russwin ML20915-LL-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-LL-626-SAF come with a warranty?
Absolutely. The Corbin Russwin ML20915-LL-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-LL-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
Why buy the Corbin Russwin ML20915-LL-626-SAF from ZenSupply?
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