Corbin Russwin ML20906 Grade 1...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,043.55
$431.22
Corbin Russwin ML20906 Fail Secure Electrified Mortise Lock, Outside Grip Locked when Energized, Outside Cylinder Override, Lever x Lever Body Only

Corbin Russwin ML20906 Grade 1 Fail Secure Electrified Mortise Lock, Outside Grip Locked when Not Energized, Outside Cylinder Override, Lever x Lever Body Only

(No reviews yet) Write a Review

Model: ML20906-LL-626-SEC
From the ML2000_Series Collection
Selected Finish is

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

$1,043.55
$431.22
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

Corbin Russwin ML20906-LL Fail Secure Electrified Mortise Lock Body with Outside Cylinder Override, Lever x Lever

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

The Corbin Russwin ML20906-LL is a fail secure electrified mortise lock body from the ML2000 Series, engineered for demanding commercial, institutional, industrial, and government environments. In fail secure operation, the latchbolt is retractable by grip from either side only when the lock is energized; when not energized, the outside grip is locked and the latchbolt may be retracted by key from the outside, while the inside grip remains always free. Constructed of heavy-gauge steel with a 1" stainless steel deadbolt and patented Quick Reversible latchbolt, this lockbody is rated for 1-3/4" (44mm) door thickness and carries a Grade 1 BHMA rating backed by UL cycle testing completed at 14.5 million cycles (Verification ID: V875753). The auxiliary latch deadlocks the latchbolt for added security, and the field-reversible handing eliminates the need for disassembly during installation.

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 Access Control Applications

Why Choose Corbin Russwin Quality?

Corbin Russwin ML2000 Series mortise lock bodies deliver professional-grade reliability through heavy-gauge steel construction, a 1" stainless steel deadbolt, and a patented Quick Reversible latchbolt — all backed by UL cycle testing completed at 14.5 million cycles (Verification ID: V875753). The ML20906-LL carries a 10 Year Limited warranty and achieves Grade 1 certification, making it an ideal choice for the most demanding commercial, institutional, and government applications where dependable fail secure 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 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 ML20906-LL-626-SEC – Frequently Asked Questions

1) What happens to a Corbin Russwin ML20906 mortise lock when the power drops?
It locks down. The ML20906 is a fail secure electrified body, so with no power the outside lever is locked and stays locked. Entry from outside is by key only, using the cylinder override. The inside lever is always free, so anyone in the room can still get out whether the lock is powered or not. If your opening needs to unlock on power loss (a stair door or an egress path tied to fire alarm release), fail secure is the wrong choice and you want a fail safe body instead.
2) What power does the ML20906 electrified mortise lock draw, and will my access control power supply handle it?
Draw is 500mA peak and 15mA holding. The inrush is what sizes the supply, not the holding current, so budget half an amp per door at the moment of actuation and derate accordingly if you are running several openings off one supply. The holding figure is low enough that a bank of doors sitting energized is not the load problem.
3) Is the Corbin Russwin ML20906 approved for a fire rated door?
Yes. The ML2000 Series body is UL and cUL listed and carries UL10C positive pressure, rated for 3-hour fire doors up to 4 by 10 feet single and 8 by 10 feet pair. It is also ANSI/BHMA A156.13 Series 1000 Grade 1 for both operational and security, ADA A117.1, California State Fire Marshal, and windstorm/hurricane certified. The auxiliary latchbolt has a 9/16 inch effective throw and deadlocks the latch, which is the anti-loiding piece a fire and security spec usually calls for.
4) Do I need to order a Corbin Russwin ML20906 left hand or right hand?
You don't have to commit to a hand. The ML20906 uses the patented Quick Reversible latchbolt, so it re-hands in the field without opening the lock case. That matters if you are stocking spares for a building with mixed swings, because one body covers both. Field reversible is how the lock is catalogued.
5) What is Request to Exit monitoring on the ML20906 and do I need it?
RX is an option you pick at order time, and every finish is offered both with and without it. The switch signals your access control panel when the inside lever is turned, so the system knows the door was opened legitimately and does not throw a forced-door alarm. If the lock is tied to a monitored access control system, order it with RX. If the electrification is only there to release the outside lever from a card reader and nothing is watching for door-forced events, the non-RX version does the job.
6) Is the ML20906 mortise lock body a complete lock, or do I need to order trim and a cylinder separately?
Body only. The ML20906-LL is the lock case itself, prepped lever by lever, and you order the levers or escutcheon trim and the cylinder as separate line items. Corbin Russwin catalogues a wide range of trim for the ML2000 Series including Museo, Vineyard, and the Behavioral Health BHSS and BLSS designs, plus status indicator trim in sectional and escutcheon styles. The cylinder specified for the series is brass, 6-pin, L4 keyway, 0-bitted as standard.
7) Can I key the ML20906 into my existing master key system?
Yes. The ML2000 Series works with new or existing Corbin Russwin key systems, and it accepts most other manufacturers' cylinders, so a building already keyed on another brand's system does not have to be re-keyed to take this lock. Standard supply is a 6-pin L4 keyway brass cylinder, 0-bitted, which is what you want if your locksmith is pinning to your existing bitting on site.
8) Will the ML20906 latch into the strike that is already in my frame?
The latchbolt throws 3/4 inch (19mm) and the standard strike 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 carries an ANSI straight lip strike of that size, which is the normal commercial mortise prep, the lock drops into it. The deadbolt is a separate 1 inch throw one-piece stainless bolt and needs the strike's deadbolt pocket to be there. A frame prepped for a cylindrical lock or a non-ANSI strike will need a new strike and a frame cutout.
9) What is the closest Grade 1 mortise lock body alternative to the Corbin Russwin ML20906 if a job is standardized on a different brand?
The Accentra 8800FL Series mortise lock body is the closest peer. Like the Corbin Russwin ML20906, it is a Grade 1 mortise lock body with field reversible handing, so handing can be set on site rather than ordered per opening. The difference that decides the choice is electrification: the ML20906 is a fail secure electrified body, meaning the outside grip is locked when not energized and the latchbolt retracts by outside key override, while the Accentra 8800FL is a mechanical lock body. Choose the ML20906 where the opening is on an access control system and needs to stay secure on power loss; the 8800FL suits an opening with no electrified requirement.
10) Will an Accentra 8800FL mortise lock body work as a drop-in replacement for a Corbin Russwin ML20906 in an access controlled door?
No. The Accentra 8800FL Series is a mechanical Grade 1 mortise lock body, while the ML20906 is a fail secure electrified body whose outside grip is controlled by the access control system and unlocks only when energized. Swapping in an 8800FL removes the electrified control of the outside grip, so the opening would no longer respond to a credential reader or a release from the system. Both share Grade 1 rating and field reversible handing, which is what makes them look interchangeable on a spec sheet, but only the ML20906 carries the fail secure electrified function with outside cylinder override.
11) Will the ML20906 mortise lock hold up on a high traffic entrance?
It is built for it. Grade 1 operational and security under A156.13 Series 1000, with UL cycle testing completed at 14.5 million cycles (Verification ID V875753), well past the Grade 1 requirement. The case is heavy-gauge steel at 5-7/8 x 4 x 15/16 inches with a wrought brass, bronze, or stainless armored front measuring 8 x 1-1/4 inches. The two-piece latchbolt carries an anti-friction insert so the door closes with less force, which is what saves the latch on a door that gets slammed a few hundred times a day.
12) How far apart are the lever and cylinder holes for prepping trim on an ML2000 mortise lock?
Center to center from knob or lever to cylinder is 3-5/8 inches (92mm), and lever to thumbturn is 2-7/16 inches (62mm). Those are the numbers you check against escutcheon trim or an existing door prep before you order. Get the spacing wrong and the trim will not land over the cylinder no matter what finish you bought.
13) What is the difference between a mortise lock body like the ML20906 and an electrified cylindrical lock?
A mortise body goes into a pocket routed into the door edge and carries both a 3/4 inch latchbolt and a separate 1 inch stainless deadbolt in one case, which is why it is the choice on heavy commercial and institutional openings and on doors that need Grade 1 security plus a deadbolt. A cylindrical lock goes through a bored hole and is quicker to install but has no mortise pocket and less case behind it. If your door is already mortised, replace it with a mortise body. If it is bored for a cylindrical lock, going to mortise means cutting the door edge, and a Grade 1 electrified cylindrical is usually the cheaper route.
14) Is there another brand of Grade 1 field reversible mortise lock body I could use instead of the Corbin Russwin ML20906?
The Accentra 8800FL Series mortise lock body is a Grade 1 body with field reversible handing, so it is the closest cross-brand equivalent on those two points. The important difference for an access control job is that the ML20906 is specifically the fail secure electrified configuration with outside cylinder override and an RX monitoring option. Match the electrical function, not just the grade, or you will get a body that mechanically fits and does the wrong thing when the power drops.
15) Can I retrofit an ML20906 into a door that already has an ML2000 Series mortise lock?
If the existing pocket is an ML2000 Series prep, the case dimensions match at 5-7/8 x 4 x 15/16 inches with a 2-3/4 inch backset and an 8 x 1-1/4 inch armored front, so the body drops into the same mortise. What changes is the wiring: this is an electrified body, so the door needs an electric hinge or door loop and a run back to the power supply, and that is the part that turns a lock swap into a real job. Existing Corbin Russwin trim and key system carry over.
16) If an opening does not need access control, is there a simpler mortise lock body than the Corbin Russwin ML20906?
Yes. The ML20906 is an electrified fail secure mortise lock body that draws 500mA peak and 15mA holding, so it requires power run to the opening and a transfer hinge or power transfer device. On an opening with no electrified requirement, the Accentra 8800FL Series mortise lock body is a Grade 1 mortise body with field reversible handing that operates mechanically, with no power run to the door. Both are Grade 1, so the security and operational rating of the opening is unchanged either way; the decision is whether the door is being tied into an access control system.
17) What finishes does the Corbin Russwin ML20906 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. Every one of them is available with or without RX monitoring. For matching a building already standardized on one look, 626 satin chrome and 630 satin stainless are the two commercial defaults you will most often be matching to.
How fast can I get the Corbin Russwin ML20906-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 ML20906-LL-626-SEC come with a warranty?
Absolutely. The Corbin Russwin ML20906-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 ML20906-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 ML20906-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.

Videos

!