Corbin Russwin ML20907 Grade 1...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,042.47
$775.60
Corbin Russwin ML20907 Fail Secure Electrified Mortise Lock, Outside Grip Locked when Energized, No Cylinder Override, Lever x Lever Body Only

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

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

$1,042.47
$775.60
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Corbin Russwin ML20907-LL-SEC Fail Secure Electrified Mortise Lock Body with Outside Grip Locked when Energized

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

The Corbin Russwin ML20907-LL-SEC is a Fail Secure electrified mortise lock body from the ML2000 Series, engineered for demanding commercial, institutional, industrial, and government environments. When energized, the outside grip is locked, while the inside grip remains always free for safe egress. The lock features a 3/4" latchbolt, an auxiliary latch that deadlocks the latchbolt, and is constructed of heavy-gauge steel with a 1" stainless steel deadbolt. Designed for 1-3/4" (44mm) standard door thickness with field-reversible handing, this Grade 1 mortise lockbody delivers life safety and security in a single door preparation. The ML2000 Series has been UL cycle tested above and beyond requirements, completing 14.5 Million Cycles (Verification ID: V875753).

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
  • Institutional and High-Security Environments

Tamper-Resistant Design

The ML2000VR (Vandal Resistant) Series variant features vandal-resistant stainless steel escutcheons with tapered edges and Torx® pin tamper-resistant screws. When paired with Corbin Russwin patented high-security Pyramid or Access 3® cylinders, any door can become a formidable barrier to intruders, making it an ideal choice for high-abuse or high-security applications.

Why Choose Corbin Russwin Quality?

Corbin Russwin ML2000 Series mortise lock products deliver professional-grade reliability with heavy-gauge steel construction and a 1" stainless steel deadbolt, UL cycle tested to an exceptional 14.5 Million Cycles (Verification ID: V875753) — well above and beyond standard requirements. Backed by a 10 Year Limited warranty and a Grade 1 rating, the ML20907-LL-SEC is engineered for the most demanding commercial applications where dependable, long-term performance is essential.

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 Secure
Product Attribute:
Mortise Locks
Electronic:
No
AMP Draw:
500mA Peak, 15mA Holding
Product Model:
ML20906
Collection:
ML2000_Series
Product Function:
Fail Secure
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-SEC – Frequently Asked Questions

1) What happens to the Corbin Russwin ML20907 mortise lock when power is lost?
It unlocks on the outside. The ML20907 is a fail secure electrified lock, so the outside lever is locked only while the solenoid is energized; drop the power and the outside grip becomes free. The inside lever is always free for egress regardless of power state. If you need the opening to stay locked during a power failure, a fail secure function is the wrong choice for that door.
2) How much current does the ML20907 electrified mortise lock draw, and what power supply do I need?
Budget for 500mA peak and 15mA holding per lock. Size the supply off the peak figure times the number of locks that could actuate at once, not the holding figure, or you will brown out the solenoid on simultaneous pulls.
3) Will the ML20907 fit a 1-3/4 inch commercial door and standard mortise pocket?
Yes, 1-3/4 inch (44mm) is the standard door thickness for this lock, with optional thicknesses available. The lockcase is heavy-gauge steel at 5-7/8 x 4 x 15/16 inches with a 2-3/4 inch backset, which is the normal ANSI mortise prep on commercial doors.
4) Do I have to order the ML20907 handed, or can it be reversed in the field?
Order either hand and reverse it on site. Handing is field reversible using the patented Quick Reversible latchbolt, which re-hands without opening the lock case. For a property manager standardizing stock across a building, that means one lock body covers left and right hand openings.
5) Does the ML20907 come with levers, trim, and a cylinder?
No. This is the lock body only, lever x lever prep. Levers or knobs, roses or escutcheons, the cylinder, and the strike are ordered separately. Corbin Russwin offers a range of trim including Museo, Vineyard, and Behavioral Health (BHSS/BLSS) designs, and thru-bolted trim for alignment.
6) Will the ML20907 work with cylinders from another manufacturer or my existing key system?
It can be keyed into new or existing Corbin Russwin key systems and accepts most other manufacturers' cylinders. Standard Corbin Russwin cylinder supply is brass, 6-pin, L4 keyway, 0-bitted. Note that the ML20907 function has no cylinder override on the outside, so the cylinder is not a bypass for the electrified lock.
7) Can I use the ML20907 on a 3-hour fire rated door?
Yes. The ML2000 Series is UL/cUL listed to UL10C positive pressure and carries a 3-hour rating on single doors up to 4 by 10 feet and pairs up to 8 by 10 feet. It also meets ANSI/BHMA A156.13 Series 1000 Grade 1 for both operational and security, ADA A117.1, and is California State Fire Marshal and windstorm/hurricane certified.
8) What strike does the ML20907 need, and will it latch into an existing ANSI strike?
Standard is an ANSI straight lip strike, 4-7/8 x 1-1/4 inches with 1-1/8 inch lip to center. The latchbolt is a two-piece anti-friction unit with 3/4 inch throw and an auxiliary deadlocking latch at 9/16 inch effective throw, so an existing ANSI 4-7/8 strike prep with adequate lip projection will take it. Check that your frame's lip-to-center matches so the auxiliary latch rides the strike face and deadlocks.
9) What is the closest alternative to the Corbin Russwin ML20907 mortise lock body from another manufacturer?
The Accentra 8800FL Series mortise lock body is the nearest peer. Both are ANSI/BHMA Grade 1 mortise lock bodies with field reversible handing. The difference is electrification: the ML20907 is an electrified fail secure body, meaning the outside grip is locked when energized with no cylinder override, while the 8800FL body is specified as a mortise lock body with field reversible handing. Choose the ML20907 when the opening is tied to an access control system and must stay locked on the secure side during a power loss.
10) If the door does not need access control, is there a simpler mortise lock body to use instead of the ML20907?
Yes. If the opening is purely mechanical with no electric strike power or card reader feeding it, the Accentra 8800FL Series Grade 1 mortise lock body with field reversible handing covers that job without any electrical connection. The ML20907 is an electrified body drawing 500mA peak and 15mA holding, so it only makes sense where power and a control system are actually present at the frame.
11) Does the ML20907 have a deadbolt, and how far does it throw?
Yes, a one-piece stainless steel deadbolt with a full 1 inch (25mm) throw, body 19/32 by 1-1/4 inches. That is the security throw on the lock; the latchbolt itself is 3/4 inch.
12) What is request-to-exit monitoring on the ML20907 and do I need it?
It is an ordering option, available yes or no across every finish offered. Choose yes when the access control panel needs to see the inside lever being turned so it can shunt the door alarm on legitimate egress. If the door is simply an access controlled entry with no alarm shunt or monitoring requirement, the non-RX version is enough.
13) What is an alternative Grade 1 mortise lock body if the Corbin Russwin ML2000 does not suit?
The Accentra 8800FL Series Grade 1 mortise lock body is the closest peer we carry, also Grade 1 with field reversible handing. It is a mechanical lock body, so if the opening needs electrified fail secure control the ML20907 is the one to specify. If you are simply replacing a mechanical mortise body in an existing 8800 prep, the Accentra is the like-for-like.
14) What is the center-to-center spacing between the lever and the cylinder on the ML2000 mortise lock?
Lever or knob to cylinder is 3-5/8 inches (92mm); lever to thumbturn is 2-7/16 inches (62mm). Use those when checking that existing escutcheon trim or an existing door prep will line up with the new lock body.
15) For standardizing mortise locks across a facility, do the Corbin Russwin ML20907 and the Accentra 8800FL meet the same grade requirement?
Both carry an ANSI/BHMA Grade 1 rating, so either satisfies a spec calling for Grade 1 mortise lock bodies. Where they differ is application: the ML20907 is the electrified fail secure body for openings on an access control system, and the Accentra 8800FL Series body covers field reversible Grade 1 mortise openings. A facility can hold Grade 1 as the standard and split the two by whether the opening is powered.
16) What finishes does the Corbin Russwin ML20907 come in?
Fourteen: 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. For matching existing commercial openings, 626 satin chrome and 630 satin stainless are the usual fleet standards.
17) How many cycles has the Corbin Russwin ML2000 mortise lock been tested to?
14.5 million cycles under UL cycle testing, Verification ID V875753, which is well past the A156.13 Grade 1 minimum. For a high-traffic opening like a school corridor or a hospital entry, that is the number to put on the submittal.
18) What is the armored front size on the Corbin Russwin ML2000 mortise lock?
8 by 1-1/4 inches, in wrought brass, bronze, or stainless steel. That is the standard ANSI mortise face, so it drops into an existing ANSI-prepped door edge without new routing.
How fast can I get the Corbin Russwin ML20907-LL-626-SEC 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-SEC come with a warranty?
Absolutely. The Corbin Russwin ML20907-LL-626-SEC 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-SEC?
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-SEC 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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