Corbin Russwin ML2048 Grade 1 ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$713.21
$287.25
Corbin Russwin Corbin Russwin ML2048 Entrance or Apartment - Mortise Lockbody Only COR-ML2048-LL

Corbin Russwin ML2048 Grade 1 Entrance or Apartment - Mortise Lockbody Only

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Model: COR-ML2048-LL-626
From the ML2000_Series Collection
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$713.21
$287.25
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Corbin Russwin ML2048-LL Grade 1 Mortise Lockbody Apartment/Entrance Function, Field Reversible

Commercial-Grade Mortise Lock Solution for Entrance and Apartment Applications

The Corbin Russwin ML2048-LL is a Grade 1 mortise lockbody from the ML2000 Series, engineered for demanding entrance and apartment applications in commercial, institutional, industrial, and government environments. Conforming to ANSI function F8/F10, this lockbody features a patented Quick Reversible latchbolt and a 1" stainless steel deadbolt, all housed in a heavy-gauge steel lock case designed for 1-3/4" (44mm) standard door thickness. The field-reversible handing eliminates the need for disassembly during installation, and the included ANSI straight lip strike measures 4-7/8" (124mm) x 1-1/4" (32mm) x 1-1/8" (29mm) lip to center, ensuring compatibility with standard door preparations.

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
  • Hotel and Hospitality Properties
  • Multi-Tenant Residential and Apartment Buildings
  • Government and Municipal Buildings
  • Industrial and Institutional Facilities

Why Choose Corbin Russwin Quality?

Corbin Russwin ML2000 Series mortise lockbodies deliver professional-grade reliability backed by UL cycle testing completed at 14.5 Million Cycles (Verification ID: V875753), far surpassing standard durability benchmarks for high-traffic commercial environments. The ML2048-LL is constructed of heavy-gauge steel with a 1" stainless steel deadbolt and carries a 10 Year Limited warranty, ensuring long-term performance and peace of mind. Engineered for demanding commercial applications where dependable security and ease of installation are essential, the ML2000 Series remains a trusted choice for offices, schools, hospitals, hotels, and government facilities.

Product Specs

Subcategory:
Mortise Locks
Product Group:
Mechanical Locks
Series:
ML2000 Series
Grade:
Grade 1
Keyed Function:
Non-Keyed
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
ANSI/BHMA:
F8/F10
Product Subgroup:
Mortise Lock Bodies
Product Type:
Mortise Lockbody Only
Keyed:
No
Commercial/Residential:
Commercial
Function Description:
Mortise Lockbody Only
Lock Type:
Mortise
Lock Function:
Apartment/Entrance
Product Attribute:
Mortise Locks
Electronic:
No
Product Model:
ML2048
Collection:
ML2000_Series
Product Function:
Apartment/Entrance
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-ML2048-LL-626 – Frequently Asked Questions

1) Will the Corbin Russwin ML2048 mortise lockbody fit a 1-3/4 inch door?
Yes. The ML2048 lockbody is built for 1-3/4 inch (44mm) door thickness as standard, which is the normal commercial door. It works on a 2-3/4 inch backset mortise pocket. Optional thicknesses are available on the ML2000 Series if your door is thicker than standard, but the stock configuration is the 1-3/4 inch one.
2) Do I need to order the ML2048 handed, or can I re-hand it on the job?
Order it either way, you can flip it on site. The ML2048 uses a patented Quick Reversible latchbolt, so handing is reversed without opening the lock case. For a locksmith carrying stock across a building of mixed left and right hand openings, that means one lockbody covers both.
3) What comes in the box with an ML2048 lockbody, and what else do I have to buy to finish the door?
You are buying the lock case and its ANSI straight lip strike (4-7/8 x 1-1/4 x 1-1/8 inch lip to center). It is the mortise body only, so the trim (lever or knob set, roses or escutcheons) and the cylinder are separate line items. The lockbody is non-keyed as sold, so plan a 6-pin cylinder into the order if the opening is keyed.
4) What does the ML2048 apartment/entrance function actually do at the door?
It is the ANSI F8/F10 entrance/apartment function: a latchbolt for everyday use plus a separate 1 inch throw stainless deadbolt for when the tenant wants the unit secured. That is why it suits apartment entry doors and tenant suites rather than a passage or privacy opening, where no deadbolt is wanted.
5) Will an ML2048 latch into the strike prep already in my frame?
If the frame carries a standard ANSI strike prep, yes. The latchbolt throws 3/4 inch (19mm) and the deadbolt throws 1 inch (25mm), and the supplied strike is the ANSI straight lip at 4-7/8 x 1-1/4 x 1-1/8 inch lip to center, which is the common commercial frame cutout. The auxiliary latchbolt gives 9/16 inch effective throw and deadlocks the main latch. Where the existing strike is a T-strike or a non-ANSI box, use the strike that ships with the lock.
6) Will the ML2048 lock case fit the mortise pocket in my existing door?
The case measures 5-7/8 x 4 x 15/16 inches (149 x 102 x 24mm) in heavy-gauge steel, with an 8 x 1-1/4 inch armored front. Center to center, knob or lever to cylinder is 3-5/8 inches (92mm) and lever to thumbturn is 2-7/16 inches (62mm). Take those numbers to the door: if the existing pocket and face prep were cut for a standard ANSI mortise lock, it drops in. If your current lock has different hole spacing on the face, the trim holes will not line up even though the pocket does.
7) Is the Corbin Russwin ML2048 approved for a fire rated apartment entry door?
Yes. The ML2048 is UL/cUL listed to UL10C positive pressure and carries a 3-hour fire door rating up to 4 x 10 feet single or 8 x 10 feet pair. It is ANSI/BHMA A156.13 Series 1000, Operational and Security Grade 1, and meets ADA A117.1. It also holds California State Fire Marshal listing and windstorm/hurricane certification, which is what a facility spec on a corridor or stair door usually calls for.
8) Can I use the ML2048 with the cylinders and key system I already have in the building?
It takes new or existing Corbin Russwin key systems and accepts most other manufacturers' cylinders, so a building already keyed on another brand's system can usually stay on it. The Corbin Russwin cylinder is brass, 6-pin L4 keyway, supplied 0-bitted so your locksmith pins it to the building's key system.
9) What is the Accentra equivalent to a Corbin Russwin ML2048 mortise lock body?
The Accentra 8800FL Series mortise lock body is the closest counterpart. Like the ML2048, it is an ANSI/BHMA Grade 1 mortise lock body with field reversible handing, so it addresses the same class of high-traffic commercial opening. The ML2048 is the apartment/entrance function in the ML2000 Series, supplied as a lock body only with a 3/4 inch latchbolt and an ANSI straight lip strike measuring 4-7/8 inches by 1-1/4 inches with a 1-1/8 inch lip to center. Confirm the 8800FL body is ordered in the function that matches the apartment/entrance operation you need before treating one as a drop-in for the other.
10) Can I use an Accentra 8800FL lock body to replace a Corbin Russwin ML2048 without changing the trim?
Treat the trim as a separate decision. Both the ML2048 and the Accentra 8800FL Series are sold as mortise lock bodies, so neither includes the lever or escutcheon, and each manufacturer's trim is engineered to its own case. The ML2048 case takes ML2000 Series trim, with knob or lever to cylinder spacing of 3-5/8 inches and knob or lever to thumbturn spacing of 2-7/16 inches. If the existing ML2000 trim is staying on the door, staying within the ML2000 Series body keeps that spacing and the thru-bolt pattern intact.
11) How does the ML2048 hold up in a high traffic apartment or school corridor?
It is cycle tested to 14.5 million cycles under UL verification, well past what A156.13 Grade 1 requires, in a heavy-gauge steel case. The 2-piece latchbolt has an anti-friction insert, so the door needs less force to pull the latch home, which matters on a closer-equipped door that gets used hundreds of times a day.
12) I have mixed finishes across my building. What finishes does the ML2048 mortise lock come in?
Fourteen finishes: 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. On a lockbody the visible finished parts are the armored front and strike, which is brass or bronze substrate, so match those to the trim you are already running on the other doors.
13) Should I buy a mortise lockbody like the ML2048 or a cylindrical lever lock?
Go mortise where the door already has a mortise pocket cut, or where you need a latch and a separate deadbolt in one case, as the F8/F10 apartment function gives. A cylindrical lock only bores through the door and is faster to install, but it cannot give you an independent 1 inch deadbolt in the same body. Mortise also carries the heavier duty cycle here, 14.5 million cycles at Grade 1. Do not try to put an ML2048 in a door bored for a cylindrical lock; the pocket has to be routed into the door edge.
14) Is there another brand of Grade 1 field reversible mortise lock body I could use instead of the Corbin Russwin ML2048?
The Accentra 8800FL Series mortise lock body is the closest alternative we carry: also Grade 1 and also field reversible handing. Where it matters is the rest of the opening. If the building is already on a Corbin Russwin key system or already running ML2000 trim, staying with the ML2048 keeps the cylinders and trim consistent. Starting fresh on a new opening, either body is a Grade 1 mortise case.
15) Can I standardize on one ML2000 lockbody across different functions in my facility?
Partly. The ML2000 Series multi-function body covers 12 functions configured from a single ML2054 lockbody, which is how a facility keeps one part number on the shelf for several openings. The ML2048 itself is the dedicated apartment/entrance F8/F10 body, so if you want one stocked case that reconfigures, ask for the multi-function ML2054 instead of stocking ML2048 for every door.
16) Does the ML2048 support electric latch retraction or a locked/unlocked indicator?
Not as this body. The ML2048 is a mechanical, non-electronic lockbody. Motorized Electric Latch Retraction is an ML20900 Series option, so an access-control opening that needs latch retraction has to be specified as an ML20900. Status indicator options for locked/unlocked visibility are available on ML2000 sectional and escutcheon trim, so an indicator comes from the trim selection rather than from the case.
17) What trim can I put on an ML2048 in a behavioral health or healthcare setting?
ML2000 trim runs from standard levers up to Museo and Vineyard designs and Behavioral Health ligature-resistant trim (BHSS/BLSS), which is what a hospital or treatment unit spec usually calls for. Trim is thru-bolted for alignment and added security. Since this is the lock case only, the trim is ordered separately and decides the look and the patient-safety rating of the finished opening.
18) Is a Grade 1 mortise body from another maker the same thing as an ML2048, or does the function code still matter?
Grade 1 sets the durability and security tier, not the operation. The Accentra 8800FL Series and the Corbin Russwin ML2048 are both Grade 1 mortise lock bodies, but the ML2048 is specifically the apartment/entrance function, ANSI F8/F10, with a 1 inch stainless steel deadbolt in addition to the latchbolt. A Grade 1 body ordered in an office or classroom function will pass the same grade requirement on a submittal and still operate differently at the door, so match the ANSI function code alongside the grade.
19) We keep both Corbin Russwin and Accentra mortise bodies in stock for apartment doors. Does either one need to be ordered handed?
Neither has to be ordered to a hand. The Accentra 8800FL Series body has field reversible handing, and the Corbin Russwin ML2048 is field reversible as well, using a patented Quick Reversible latchbolt that re-hands without disassembling the lock case. For an MRO shelf covering left and right hand apartment doors, that means one part number per model rather than two, and the hand is set at the opening.
20) If the door needs an electrified mortise lock, is the ML2048 or the Accentra 8800FL body the right choice?
Neither of those bodies is the electrified part. The ML2048 is a non-electronic, non-keyed mechanical lock body, and the Accentra 8800FL Series body is a mechanical mortise lock body as well. Within the Corbin Russwin range, Motorized Electric Latch Retraction is offered on the ML20900 series rather than on the mechanical ML2048, so an opening that calls for latch retraction should be specified there.
How fast can I get the Corbin Russwin COR-ML2048-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-ML2048-LL-626 come with a warranty?
Absolutely. The Corbin Russwin COR-ML2048-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-ML2048-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
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