Corbin Russwin ML20906 Grade 1...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,043.55
$422.66
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

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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
$422.66
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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 is a fail secure electrified mortise lock?
A fail secure lock remains locked when power is lost. The ML20906 locks the outside grip when energized and unlocks when power is removed. This provides security during power outages but requires battery backup for emergency egress systems.
2) How does the outside cylinder override work?
The cylinder override allows mechanical key operation even when the lock is electrically energized. This provides backup access and administrative control independent of the electronic access control system.
3) What door preparations are required for this mortise lock?
Standard ANSI mortise preparation with 1" x 8" mortise pocket and 2-1/8" bore for cylinder. Verify door thickness compatibility and check manufacturer template for exact dimensions and electric wire routing.
4) What voltage does the ML20906 require?
Verify voltage requirements with manufacturer specifications before installation. Most Corbin Russwin electrified locks operate on 12VDC or 24VDC. Connect to appropriate power supply sized for the lock's current draw.
5) Can this lock be used on fire rated doors?
Check the lock's fire rating and listing compatibility with your door assembly. Fire rated installations require listed hardware and proper installation per manufacturer instructions and local fire codes.
6) How do I determine the correct handing for installation?
Stand on the outside of the door. If hinges are on the right, it's right hand. If hinges are on the left, it's left hand. This body-only unit allows field configuration for proper handing during installation.
7) What additional components are needed with this body-only lock?
You'll need appropriate trim, cylinders, and strikes sold separately. Select trim based on door thickness, desired function, and aesthetic requirements. Browse our Corbin Russwin selection for compatible components.
8) How do I wire the electrified function?
Route low voltage wiring through door and frame per manufacturer wiring diagram. Use proper gauge wire for voltage and distance. Connect to access control panel or switch following all electrical codes and manufacturer specifications.
9) What maintenance does this electrified lock require?
Check electrical connections periodically for corrosion or looseness. Test mechanical override operation monthly. Lubricate moving parts per manufacturer schedule. Monitor current draw to detect wear or binding issues.
10) Are there other ML209 series options available?
The ML209 series includes various electric functions, voltages, and configurations. Check our mortise locks category for alternative models and compatible Corbin Russwin electrified options.
11) Can this lock integrate with existing access control systems?
Most access control panels can operate this fail secure lock through relay outputs. Verify voltage compatibility and current requirements. Some systems may require interface modules for proper operation and monitoring.
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.

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