Corbin Russwin ML2073 Grade 1 ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$713.21
$418.91
Corbin Russwin Corbin Russwin ML2073 Classroom Security - Mortise Lockbody Only COR-ML2073-LL

Corbin Russwin ML2073 Grade 1 Classroom Security - Mortise Lockbody Only

(No reviews yet) Write a Review

Model: COR-ML2073-LL-626
From the ML2000_Series Collection
Selected Finish is

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

$713.21
$418.91
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 ML2073 Classroom Security Mortise Lockbody, Grade 1, Field Reversible, 1-3/4" Door

Commercial-Grade Classroom Security Mortise Lock for High-Traffic Institutional Applications

The Corbin Russwin ML2073 is a Grade 1 classroom security mortise lockbody from the ML2000 Series, engineered for demanding commercial, institutional, industrial, and government environments. Constructed of heavy-gauge steel with a 1" stainless steel deadbolt and patented Quick Reversible latchbolt, this lockbody is designed for 1-3/4" (44mm) standard door thickness and features field-reversible handing for flexible installation. The ML2073 function locks the outside grip via deadbolt projection while allowing free egress from the inside, making it an ideal classroom security solution. The included ANSI straight lip strike measures 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

  • K-12 Schools and Educational Facilities
  • College and University Campus Buildings
  • Healthcare Institutions and Medical Facilities
  • Commercial Office Buildings
  • Government and Municipal Buildings
  • Industrial and Institutional Facilities
  • Hotels and Multi-Use Hospitality Properties

Tamper-Resistant Design

The ML2000VR (Vandal Resistant) Series option features vandal-resistant stainless steel escutcheons with tapered edges and Torx® pin tamper-resistant screws, providing a formidable barrier against intrusion and abuse. When paired with Corbin Russwin patented high-security Pyramid or Access 3® cylinders, the ML2073 delivers a comprehensive security solution for any commercial door application.

Why Choose Corbin Russwin Quality?

Corbin Russwin ML2000 Series mortise locks deliver professional-grade reliability with heavy-gauge steel construction and a 1" stainless steel deadbolt, backed by UL cycle testing verified at 14.5 Million Cycles (Verification ID: V875753). The ML2073 is covered by a 10 Year Limited warranty, reflecting Corbin Russwin's commitment to long-term performance. Engineered for the most demanding commercial, institutional, and government applications where dependable classroom security is essential.

Product Specs

Subcategory:
Mortise Locks
Product Group:
Mechanical Locks
Series:
ML2000 Series
Grade:
Grade 1
Keyed Function:
Double Cylinder
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
Keyed:
Yes
Commercial/Residential:
Commercial
Function Description:
Mortise Lockbody Only
Lock Type:
Mortise
Lock Function:
Classroom Security
Product Attribute:
Mortise Locks
Electronic:
No
Product Model:
ML2073
Collection:
ML2000_Series
Product Function:
Classroom Security
Door Hand Direction:
Field Reversible
Door Thickness Range:
1-3/4"
Product Category:
Mechanical Locks
Product Substrate:
Brass or Bronze
Department:
Door Hardware

Corbin Russwin COR-ML2073-LL-626 – Frequently Asked Questions

1) Does the Corbin Russwin ML2073 come with the lever trim and cylinder, or is it just the lock case?
What you get is the mortise lock body alone. Levers or knobs, escutcheon or sectional trim, and the cylinders all have to be ordered separately. The ML2073 is a double cylinder classroom security function, so plan on two cylinders for the opening. Corbin Russwin's standard cylinder is brass with a 6-pin L4 keyway, 0-bitted, and the lock accepts most other manufacturers' cylinders if you are matching an existing key system.
2) What does the ML2073 classroom security function actually do at the door?
Turning the key from either side throws the 1 inch stainless steel deadbolt, and it is the deadbolt projection that locks the outside grip. The inside lever always retracts the latch, so egress is never blocked, which is what makes it usable for lockdown on a classroom door. Because both sides are keyed, a teacher can secure the room from inside the corridor side of the key system without stepping out.
3) Will the ML2073 drop into my existing mortise pocket and strike?
It works on a standard ANSI mortise prep: 2-3/4 inch backset, a lock case measuring 5-7/8 x 4 x 15/16 inches, and an 8 x 1-1/4 inch armored front. The latchbolt throws 3/4 inch and the auxiliary deadlatch gives 9/16 inch effective throw, so it latches into a normal ANSI strike lip. The supplied strike is ANSI straight lip, 4-7/8 x 1-1/4 inches with 1-1/8 inch lip to center. Check your cross bores too: knob/lever to cylinder is 3-5/8 inch center to center, and knob/lever to thumbturn is 2-7/16 inch.
4) Do I need to order a left hand or right hand ML2073?
No handing to specify. The ML2073 ships field reversible, and the patented Quick Reversible latchbolt lets you flip handing without opening the lock case, so one part number covers all four hands. Useful if you are stocking spares for a building with mixed swings.
5) Can I use the ML2073 on a 1-3/8 inch door?
Not as standard. The lock is built for 1-3/4 inch (44mm) door thickness, which is the usual commercial leaf. Corbin Russwin does offer optional thicknesses in the ML2000 Series, so a thicker or thinner door has to be specified as an option rather than taken off the shelf.
6) Is the ML2073 approved for a fire rated classroom door?
Yes. It is UL/cUL listed and UL10C positive pressure rated, good for 3-hour fire doors up to 4 x 10 feet single or 8 x 10 feet pair. It also carries ANSI/BHMA A156.13 Series 1000 Grade 1 for both operational and security, ADA A117.1, California State Fire Marshal, and windstorm/hurricane certification.
7) We already have Corbin Russwin keys in the building. Will the ML2073 key into our system?
Yes. The ML2073 works with new or existing Corbin Russwin key systems, and it will also take most other manufacturers' cylinders if the campus is keyed to a different brand. For higher security openings it pairs with Corbin Russwin patented Pyramid or Access 3 cylinders.
8) What is the closest cross-brand equivalent to the Corbin Russwin ML2073 mortise lock body?
The Accentra 8800FL Series mortise lock body is the closest cross-brand counterpart. Both are ANSI/BHMA Grade 1 mortise lock bodies sold as the lock case alone, and both offer field reversible handing, so neither has to be ordered by hand. The difference is the key system and trim ecosystem: the ML2073 is a Corbin Russwin ML2000 Series case with a 2-3/4 inch backset, a 1 inch stainless steel deadbolt and a 3/4 inch throw anti-friction latchbolt, and it pairs with Corbin Russwin ML2000 trim, while the 8800FL body takes Accentra 8800 Series trim. If the building is already standardized on one of those two key systems and trim lines, follow that rather than the case alone.
9) Will an Accentra 8800FL lock body work as a drop-in replacement for a Corbin Russwin ML2073?
Treat it as a different system rather than a drop-in. Both are Grade 1 mortise lock bodies with field reversible handing, so they serve the same class of opening, but the ML2073 is an ML2000 Series case designed to accept Corbin Russwin ML2000 trim and Corbin Russwin key systems, and it ships with a 6-pin L4 keyway cylinder arrangement and an ANSI straight lip strike measuring 4-7/8 by 1-1/4 inches with 1-1/8 inch lip to center. Swapping brands at the case generally means changing the trim, the cylinders and possibly the strike as well. If you are repairing an existing Corbin Russwin ML2000 opening and want to keep the levers and keys, stay with the ML2073.
10) For a classroom security function specifically, does a generic Grade 1 mortise body cover it?
Not necessarily - grade and function are separate decisions. The Accentra 8800FL Series body is rated Grade 1, but the classroom security behavior is a function of the specific case you order. The Corbin Russwin ML2073 is built to the classroom security function: the outside grip is locked by projecting the deadbolt from either side by key, while the inside lever always retracts both bolts for free egress. If the spec on the drawing calls for classroom security lockdown from inside the room, confirm the function code of whatever body you buy, not just its grade.
11) How durable is the ML2073 for a high traffic school corridor?
Heavy-gauge steel lock case, one-piece stainless steel deadbolt, and a two-piece latchbolt with an anti-friction insert that cuts the force needed to close the door. Corbin Russwin has it UL cycle tested to 14.5 million cycles (Verification ID V875753), well past the Grade 1 minimum, which is why it shows up on K-12, campus, and healthcare openings.
12) Can I add a status indicator or electric latch retraction to this lock?
Indicator options showing locked/unlocked are offered in the ML2000 Series on sectional and escutcheon trim, so that is a trim-side decision made when you order the trim. Motorized Electric Latch Retraction is not available on the ML2073 itself; MELR is an ML20900 series option. The ML2073 is a mechanical, non-electronic lock body.
13) What is a comparable Grade 1 mortise lock body if I am not standardized on Corbin Russwin?
The Accentra 8800FL Series mortise lock body is the closest cross-brand equivalent we carry: Grade 1, and like the ML2073 it ships with field reversible handing. Note that swapping brands means the trim, cylinder, and keying all move with it, so on an existing Corbin Russwin keyed facility it is usually cheaper to stay with the ML2073 and reuse the key system.
14) Can I change the ML2073 to a different lock function later without buying a new lock body?
The ML2000 Series is multi-function: 12 functions can be configured from a single ML2054 lock body. So if you are standardizing spares across a facility, you can stock one multi-function case and set it for classroom security or another function as openings change, instead of carrying a separate body per function.
15) I need a Grade 1 mortise lock body but the door is already hung - do I have to know the hand before ordering?
No, not with either of the common Grade 1 bodies. The Corbin Russwin ML2073 uses a patented Quick Reversible latchbolt that lets you re-hand it without opening the lock case, and the Accentra 8800FL Series body is likewise supplied with field reversible handing. Either one can be stocked as a single line item and set to left or right hand at the opening, which is the usual reason a school or campus MRO shelf carries one part number instead of two.
16) What should I order if I need the complete lockset and not just the case?
The Corbin Russwin ML2073 and the Accentra 8800FL Series are both supplied as the mortise lock body alone - the steel case with the latchbolt, deadbolt and auxiliary latch, no levers, no escutcheon or rose, no cylinder. For a complete opening you add the ML2000 Series trim in the design and finish you want, plus the cylinder, on top of the ML2073 case. Buyers who only need to replace a worn or failed case in an existing frame order the body by itself and reuse the trim already on the door.
17) What finishes does the ML2073 mortise lock body come in?
Fourteen finishes, covering brass (605 bright, 606 satin), bronze (611 bright, 612 satin, 613 oil-rubbed, 613E dark oxidized equivalent, 722 black oxidized oil-rubbed), nickel (618 bright, 619 satin), chrome (625 bright, 626 satin), stainless (629 bright, 630 satin), and BSP black suede powder coat. On a lock body only, the finish shows on the armored front and strike, so match it to the trim you are ordering.
18) Is there a vandal resistant version for a rough opening?
Yes, the ML2000VR option uses stainless steel escutcheons with tapered edges and Torx pin tamper-resistant screws. Trim on the series is also thru-bolted, which keeps alignment and makes the trim harder to pull off. That VR choice is made on the trim order, not on the lock body itself.
How fast can I get the Corbin Russwin COR-ML2073-LL-626 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 COR-ML2073-LL-626 come with a warranty?
Absolutely. The Corbin Russwin COR-ML2073-LL-626 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 COR-ML2073-LL-626?
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 COR-ML2073-LL-626 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

!