Corbin Russwin ML20907 Grade 1...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,042.47
$755.45
Corbin Russwin ML20907 Fail Safe Electrified Mortise Lock, Outside Grip Locked when Energized, Outside Cylinder Override, Lever x Lever Body Only

Corbin Russwin ML20907 Grade 1 Fail Safe Electrified Mortise Lock, Outside Grip Locked when Energized, No Cylinder Override, Lever x Lever Body Only

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Model: ML20907-LL-626-SAF
From the ML2000_Series Collection
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,042.47
$755.45
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Corbin Russwin ML20907-LL-SAF ML2000 Series Fail Safe Electrified Mortise Lock Body, Outside Grip Locked When Energized, Lever x Lever, Field Reversible

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

The Corbin Russwin ML20907-LL-SAF is a Grade 1 electrified fail safe mortise lock body from the ML2000 Series, engineered for demanding commercial, institutional, industrial, and government environments. This lever x lever body-only configuration locks the outside grip when energized while keeping the inside grip always free, with an auxiliary latch that deadlocks the latchbolt for added security. Constructed of heavy-gauge steel with a 3/4" latchbolt and a 1" stainless steel deadbolt, it accommodates standard 1-3/4" (44mm) door thickness and features a field-reversible design for flexible installation. The unit draws 500mA peak and 15mA holding current, and is supplied with an ANSI straight lip strike measuring 4-7/8" (124mm) x 1-1/4" (32mm) x 1-1/8" (29mm) lip to center.

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 Multi-Tenant Residential Properties
  • Industrial and Warehouse Facilities
  • Government and Municipal Buildings
  • Access-Controlled Institutional Environments

Tamper-Resistant Design

The ML2000VR (Vandal Resistant) Series option features stainless steel escutcheons with tapered edges and Torx® pin tamper-resistant screws, providing a formidable barrier against vandalism and forced-entry attempts. When paired with Corbin Russwin Pyramid or Access 3® high-security cylinders, the ML20907 delivers a comprehensive intrusion-deterrent solution for high-risk openings.

Why Choose Corbin Russwin Quality?

Corbin Russwin ML2000 Series mortise lock bodies are built from heavy-gauge steel and have been UL cycle tested to over 14.5 million cycles (Verification ID: V875753), far exceeding standard Grade 1 requirements for the most demanding high-traffic applications. The ML20907-LL-SAF is backed by a 10 Year Limited warranty and features a patented Quick Reversible latchbolt and a 1" stainless steel deadbolt, delivering life safety and security in a single door preparation. Engineered for commercial, institutional, and government environments where dependable, code-compliant performance is essential.

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:
ML20906
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 ML20907-LL-626-SAF – Frequently Asked Questions

1) On the Corbin Russwin ML20907, what happens to the door when power is lost?
It unlocks. The ML20907 is a fail safe electrified mortise lock: the outside lever is locked while the lock is energized, and when power drops the outside grip becomes free. The inside lever is always free for egress. That behavior is what you want on a stair or egress-side opening tied to a fire alarm release, and the wrong behavior on a door that has to stay secure through a power outage, where a fail secure lock body is the right call.
2) What current does the ML20907 electrified mortise lock draw for sizing a power supply?
500mA peak and 15mA holding. Size the supply for the inrush across every lock on the circuit, not the holding figure, since a bank of these pulling 500mA each at the same moment is what drops a marginal supply.
3) Will a Corbin Russwin ML20907 mortise lock fit a 1-3/4 inch door, and does it come in a thicker version?
1-3/4 inch (44mm) is the standard door thickness for the ML20907, which is the usual commercial door. The ML2000 Series also offers optional thicknesses, so a thicker door has to be called out when the order is placed rather than adapted in the field. Backset is 2-3/4 inches and the lockcase is 5-7/8 x 4 x 15/16 inches, so the pocket has to be cut to that.
4) Do I need to order the Corbin Russwin ML20907 handed, or can I reverse it on site?
It ships handed but it is field reversible. The ML2000 Series uses a patented Quick Reversible latchbolt, so the hand is changed without opening the lock case. Useful when a door gets swapped or the opening on the drawing does not match what is actually hung.
5) Does the ML20907 include levers, trim, or a cylinder, or is it just the lock case?
Body only. The ML20907-LL-SAF is the mortise lock body in a lever x lever configuration, supplied with the ANSI straight lip strike. Levers, roses or escutcheons, and the cylinder are ordered separately, so budget the trim package and the cylinder into the same order or the opening cannot be finished.
6) Will the ML20907 latch into the strike already in my frame?
The strike supplied is ANSI straight lip, 4-7/8 x 1-1/4 inches with a 1-1/8 inch lip to center, and the latchbolt throws 3/4 inch with a 1 inch stainless deadbolt throw. If your frame already carries an ANSI 4-7/8 inch strike prep from another mortise lock, the new strike drops into the same cutout. A frame with a non-ANSI or T-strike prep needs the opening modified.
7) Can the ML20907 go on a fire rated opening?
Yes. The ML2000 Series is UL/cUL listed to UL10C positive pressure and rated for 3-hour fire doors up to 4' x 10' single or 8' x 10' pair. It also lists ANSI/BHMA A156.13 Series 1000 Grade 1 operational and security, ADA A117.1, California State Fire Marshal, and windstorm/hurricane certification. On a fail safe function, confirm your code official accepts an unlocking-on-power-loss lock at that specific opening.
8) Can I substitute an Accentra 8800FL mortise lock body for the Corbin Russwin ML20907 on an access-controlled door?
Not as a direct function-for-function swap. The ML20907 is an electrified fail safe mortise lock body - it is wired into the access control system and unlocks the outside grip when power is removed, at 500mA peak and 15mA holding. The Accentra 8800FL Series Grade 1 mortise lock body is a mortise body with field reversible handing in the same Grade 1 class, so it will meet the same performance grade and mortise pocket category, but it is the choice when the opening is keyed mechanically rather than controlled electrically. On a card-reader or fire-alarm-released opening, stay with the electrified ML20907.
9) Can I use my existing Corbin Russwin keys, or a cylinder from another brand, with the ML20907?
It works with new or existing Corbin Russwin key systems, and the ML2000 Series accepts most other manufacturers' cylinders, so a facility standardized on another keyway can usually stay standardized. The Corbin Russwin standard cylinder is brass with a 6-pin L4 keyway, supplied 0-bitted. Note this particular function has no cylinder override on the outside, so the cylinder is for the key system, not for bypassing the electric lock.
10) What is the Request to Exit option on the ML20907 and do I need it?
Each finish is offered with or without request-to-exit monitoring. Specify Yes when the access control panel needs to know the inside lever has been turned, so it can shunt the door alarm on legitimate egress. If the opening is only being locked and unlocked by the system with no alarm shunt or audit requirement, the non-RX body is the one to order. It is an ordering decision, not a field retrofit.
11) I need a Grade 1 mortise body that can be handed on site - what are my options?
Both the Corbin Russwin ML20907 and the Accentra 8800FL Series mortise lock body are Grade 1 and field reversible, so handing can be set at the opening rather than specified at order. Choose the ML20907 when the door is electrified fail safe and the outside grip must lock when energized; choose the 8800FL body when a standard mortise body is what the opening calls for. Both ship as lock bodies, so trim and cylinder are ordered separately.
12) What finishes does the Corbin Russwin ML20907 come in for matching the rest of my building?
Fourteen finishes across the brass, bronze, nickel, chrome, and stainless families: 605 bright brass, 606 satin brass, 611 bright bronze, 612 satin bronze, 613 satin bronze oil-rubbed, 613E dark oxidized satin bronze equivalent, 618 bright nickel, 619 satin nickel, 625 bright chrome, 626 satin chrome, 629 bright stainless, 630 satin stainless, 722 black oxidized bronze oil-rubbed, and BSP black suede powder coat. 626 and 630 are the two you will most often see on existing commercial openings.
13) How durable is the ML20907 for a high-traffic entrance?
The ML2000 Series lockcase is heavy-gauge steel and has been UL cycle tested to 14.5 million cycles (Verification ID V875753), well past the Grade 1 minimum, with a two-piece anti-friction latchbolt that reduces the force needed to close the door. That is the case to make for a main entry, a dorm corridor, or a hospital door that gets used thousands of times a week.
14) Is there a vandal resistant version of the ML20907 for a high-risk opening?
The ML2000VR option covers it, with stainless steel escutcheons, tapered edges, and Torx pin tamper-resistant screws. Paired with Corbin Russwin Pyramid or Access 3 high-security cylinders, it is the package for detention-adjacent, transit, or exposed exterior openings. Behavioral Health trim (BHSS/BLSS) is also offered in the series for ligature-sensitive rooms.
How fast can I get the Corbin Russwin ML20907-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 ML20907-LL-626-SAF come with a warranty?
Absolutely. The Corbin Russwin ML20907-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 ML20907-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 ML20907-LL-626-SAF 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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