Sargent 8247-ET Heavy Duty Sin...
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$1,848.69
$1,404.92
Sargent Sargent 8200 Series - (8247) Front Door or Apartment Corridor Function Escutcheon Trim, Heavy Duty Single Cylinder with Deadbolt Mortise Lock, Grade 1 SGT-8247-ET

Sargent 8247-ET Heavy Duty Single Cylinder Mortise Lock with Deadbolt - Grade 1 Front Door Function

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Model: 8247 LE1A 26D
From the 8200 Series Collection
$1,848.69
$1,404.92
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,848.69
$1,404.92
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Sargent 8247-ET Heavy Duty Grade 1 Mortise Lock with Deadbolt and 2 3/4" Backset

Industry Benchmark Mortise Lock with Maximum Security and Performance

The Sargent 8247-ET represents the industry benchmark for commercial mortise locks, delivering maximum security, performance, and durability with high-quality components. This Grade 1 heavy duty single cylinder lock features a multi-functional lock body with 2 3/4" backset, 1 3/4" door thickness compatibility, and 3/4" latchbolt throw. Tested to 16 million cycles with UL 10C fire rating up to 3 hours, this lock integrates with all SARGENT key systems including Degree, Signature, KESO, and XC.

Professional Features & Benefits

  • Door Compatibility: Designed for 1 3/4" door thickness with 2 3/4" backset and 3/4" latchbolt throw for standard commercial door applications.
  • Heavy-Duty Durability: UL Cycle Above and Beyond test completed at 16 million cycles (Verification ID: V584148) for exceptional longevity in high-traffic commercial applications.
  • Grade 1 Performance: ANSI/BHMA A156.13 Series 1000 Operational Grade 1 certification ensures maximum security and reliability for demanding applications.
  • Fire-Rated Construction: UL 10C positive pressure fire-rated up to 3 hours with NFPA 80 compliance for critical fire safety applications.
  • Universal Key System Integration: Compatible with all SARGENT key systems (Degree, Signature, KESO, and XC) for flexible master keying options.
  • Multi-Functional Design: Available in 56 different functions including electromechanical, security and monitoring options with field-reversible handing.
  • EcoFlex Technology: Electromechanical versions operate from 12 to 24VDC with EcoFlex technology reducing power consumption up to 96% for energy efficiency.
  • Manufacturer Warranty: 10-year limited warranty with 2-year coverage on electrical components for added confidence and protection.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Installation & Operation

  1. Review manufacturer specifications and verify door preparation requirements including 1 3/4" door thickness, 2 3/4" backset, and handing as applicable to this product.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces.
  3. Prepare door and frame by drilling required holes and routing as specified in manufacturer instructions.
  4. Install all mounting hardware and secure the device to door and frame per manufacturer torque specifications.
  5. Adjust operational components for proper alignment, latching, and smooth operation throughout the full range of motion.
  6. Test device operation to verify proper function and make final adjustments as needed. Refer to manufacturer documentation for complete installation details and troubleshooting.

Professional Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Retail Establishments
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings

Why Choose Sargent Quality?

Sargent mortise locks deliver professional-grade reliability with patented design and construction rated for 16 million cycles with independently verified testing. 10-year limited warranty with 2-year coverage on electrical components provides comprehensive protection. Engineered for demanding commercial applications where dependable performance and maximum security are essential.

Product Specs

Series:
8200 Series
Grade:
Grade 1
Keyed Function:
Single Cylinder
Product Group:
Mechanical Locks
Product Subgroup:
Bored Locksets
Subcategory:
Bored Locksets
Keyed:
Yes
Commercial/Residential:
Commercial
Lock Type:
Mortise
Lock Function:
Front Door/Apartment Corridor
Product Type:
Mortise Locks
Duty Level:
Heavy Duty
Handle Type:
Lever
Product Attribute:
Mortise Locks
Electronic:
No
Product Function:
Corridor
Product Category:
Mechanical Locks
Collection:
8200 Series
Department:
Door Hardware

Sargent 8247 LE1A 26D – Frequently Asked Questions

1) Will the Sargent 8247 mortise lock fit a 1-3/4 inch door with a 2-3/4 inch backset prep?
That is exactly the prep the 8247 is built for: 2-3/4 inch backset, 1-3/4 inch door thickness. The latchbolt throws 3/4 inch. If your existing mortise pocket is cut for a 2-3/4 backset (the standard commercial mortise backset), the lock body drops into it. Doors thicker or thinner than 1-3/4 inches are outside what the 8247 is specified for.
2) What does the Sargent 8247 front door / apartment corridor function actually do?
The 8247 is the apartment corridor function: a keyed lever on the outside plus a separate deadbolt, single cylinder. The key retracts the latch from outside, and the deadbolt is thrown by the inside turn (single cylinder means key outside, thumbturn inside). That is the classic apartment entry setup, where the tenant deadbolts from inside and the corridor side is key-only. If you need a tenant-side space where no one should be able to lock out egress, or a storeroom where the outside lever is always fixed, a different 8200 function is the right call.
3) Can I key a Sargent 8247 into the master key system already running in my building?
If your building runs on Sargent, yes. The 8247 works with every SARGENT key system, including Degree, Signature, KESO, and XC, so it can be pinned into an existing Sargent master system. You choose the cylinder when ordering: a standard cylinder, less cylinder, 70 prep for small format interchangeable core (less core), or 60 prep for large format interchangeable core (less core). If your locksmith stocks your own cores, order the 60 or 70 prep and drop your cores in. Keying is specified as keyed different, keyed alike, or to a key code you supply.
4) Do I have to specify handing when I order a Sargent 8200 mortise lock?
The 8200 mortise lock body is field reversible for handing, so a single lock covers left and right hand openings and you do not have to commit to a hand at the order form. What you do have to pick is the trim: escutcheon style (LE1, LS, LW1 or WT), lever design (A, B, E, F, J, L, P or W), and finish. Handing the lock is done on the job.
5) Is the Sargent 8247 mortise lock fire rated for a 3 hour opening?
Yes. The 8247 is UL 10C positive pressure fire rated up to 3 hours and complies with NFPA 80, so it can go on a rated corridor or stair opening up to that rating. It also carries ANSI/BHMA A156.13 Series 1000 Operational Grade 1.
6) What is the closest cross-brand equivalent to the Sargent 8247 mortise lock for an apartment corridor door?
For an apartment corridor opening, the closest peer is the Baldwin 6301LS, a lever-by-lever mortise lock body with an Entrance/Apartment function and a 2-1/2 inch backset, rated for doors 1-3/4 inch and over. The Sargent 8247-ET is a Grade 1 mortise lock with a Front Door/Apartment Corridor function and lever trim, keyed single cylinder. The practical difference is backset and trim: the Sargent 8247-ET ships as a complete escutcheon-trim lockset in LE1, LS, LW1 and WT escutcheons, while the Baldwin 6301LS is the lock body at a 2-1/2 inch backset, so door prep and mortise pocket location differ between the two.
7) Which mortise lock should I use if the door needs a storeroom function instead of a corridor function?
Use a lock built for storeroom duty rather than the Sargent 8247-ET, which is a Front Door/Apartment Corridor function lock. The Accentra 8805FL is a Grade 1 storeroom mortise lock in the 8800 Series with an Arcadia lever. The Cal-Royal NM8080 is a Grade 1 storeroom mortise lockset for 1-3/4 inch doors with an interchangeable core option. Both keep the lever trim and Grade 1 rating; the change is that the outside lever stays locked at all times and the key retracts the latch, where the 8247 corridor function is built around apartment entry with a deadbolt.
8) What mortise lock is the equivalent of the Sargent 8247 in a keypad or electronic version?
Several electronic mortise locks cover apartment and corridor style access. The Alarm Lock DL4500DB is a Grade 1 electronic mortise deadbolt with 2,000 user codes and a privacy keypad for doors 1-5/8 to 1-7/8 inch. The Dormakaba E-Plex E5086 is a Grade 1 entry/egress electronic pushbutton and card mortise lock in a back-to-back configuration. The Sargent 8247-ET is a mechanical, non-electronic Grade 1 lock keyed as a single cylinder, so choosing one of the electronic peers replaces key issuance with code or credential management and adds a power source to maintain.
9) Is the Schlage L9092EU corridor mortise lock a substitute for the Sargent 8247?
They share the corridor function but not the operation. The Schlage 03A electric lock/unlock outside lever mortise lock is a heavy duty corridor function lock for 1-3/4 inch doors, keyed outside, with request-to-exit monitoring and 12/24VDC operation, so it needs power and wiring to the door. The Sargent 8247-ET is a mechanical heavy duty Grade 1 corridor function lock, single cylinder with a deadbolt and no electrical connection. Choose the Schlage where the opening ties into an access control system with REX signaling, and the 8247 where the door is controlled by key alone.
10) What looks like a substitute for the Sargent 8247 mortise lock but will not work as one?
Dummy and passage mortise trim will not. The Schlage L0170 is a Grade 1 mortise non-keyed lever lock in a half dummy trim for 1-3/4 inch doors, and the Emtek 3104 Hamilton mortise entrance lockset is a dummy with no working latch at all. The Schlage PM010 is a Grade 1 passage latch mortise lock, non-keyed, for 1-3/4 inch doors. All three mount in a mortise opening and read as full locksets in a photo, but none of them lock. The Sargent 8247-ET is keyed with a single cylinder and a deadbolt, so a dummy or passage unit cannot stand in on an apartment or front door opening.
11) What mortise lock should I specify instead of the Sargent 8247 for a behavioral health or anti-ligature opening?
Use a ligature resistant lockset. The TownSteel MRX-L-01 is a Grade 1 heavy duty stainless steel anti-ligature lever mortise lockset with a Passage function for 1-3/4 inch doors, and the TownSteel MRX-A-01 is the same passage function in a satin stainless steel ligature resistant arch trim. The Marks USA 5PDN is a Grade 1 hospital passage mortise push/pull paddleset that is ligature resistant and ADA compliant in satin stainless steel. The Sargent 8247-ET uses a standard lever with escutcheon trim, which presents a ligature point those openings are designed to eliminate. Note that all three of those peers are passage function, so they do not lock.
12) What Grade 1 mortise lock takes a credential or RFID reader if I am standardizing an apartment building on card access?
The TownSteel FME-2000 is a Grade 1 heavy duty mortise lockset with RFID technology in a Classroom function for 1-3/4 inch doors. The Dormakaba LX-I-M002 Saffire is an electronic RFID mortise lockset with BLE mobile access at BHMA Grade 2. The Schlage Electronics LEMD-GRW is a Grade 1 ENGAGE Series wireless mortise lock with a 125kHz proximity reader, mobile enabled deadbolt with LED, Greenwich trim, right hand, with a 3 hour fire rating. The Sargent 8247-ET is the mechanical option on the same kind of opening, keyed single cylinder with a deadbolt, so mixing the two across a building means running two credential programs.
13) Is a Sargent 8200 mortise lock heavy duty enough for a high traffic apartment or office corridor?
It is built for exactly that. The 8247 is a Grade 1 heavy duty commercial lock and Sargent completed the UL Cycle Above and Beyond test at 16 million cycles (Verification ID V584148). For a main entry or corridor door cycling all day in an apartment building, school, hospital, or office, that cycle number is the reason to spend on a mortise lock instead of a bored lockset.
14) Should I use a mortise lock with a deadbolt like the Sargent 8247, or a separate deadbolt above a lockset?
The 8247 puts the latch and the deadbolt in one mortise body behind one escutcheon, so the door gets one pocket and one prep instead of a lockset plus a separate deadbolt bore higher up. That matters on a fire rated apartment entry, where every added prep is another thing to certify, and it keeps the door face clean. If your door is already bored for a cylindrical lockset and you do not want to route a mortise pocket, a mortise lock is the wrong direction, that job wants a bored lock and an auxiliary deadbolt instead.
15) Is the Sargent 8247 an electronic lock, and what do I order if I need the door to release from an access control system?
No, the 8247 as configured is a mechanical lock, not electronic. The 8200 family does include electromechanical versions that run 12 to 24VDC with EcoFlex, if you need an electrified mortise lock on this opening. Other options ZenSupply carries include the Schlage L9092EU mortise lock, which is a corridor function electric lock/unlock outside lever with request to exit at 12/24VDC, the BEST 45HW wired electromechanical mortise lock at 12V/24V, and the Command Access ML190, a motorized mortise lock with field selectable EL/EU operation on 24VDC.
16) What is the closest alternative to the Sargent 8247 if I am not standardized on Sargent keyways?
For a Grade 1 mortise lock on a 1-3/4 inch door from another line, the Cal-Royal NM8050 is an office/entrance function heavy duty Grade 1 mortise lockset with auxiliary deadlatch, and the Corbin Russwin ML2003 is a Grade 1 classroom mortise lockset for 1-3/4 inch doors. Both are Grade 1 mortise like the 8247, but neither is listed with the 8247's deadbolt, so if the apartment corridor deadbolt is the reason you are buying, they are not a straight swap. The closest on function is the Cal-Royal NM8440, a Grade 1 mortise lockset with deadbolt for 1-3/4 inch doors, though it is a privacy function rather than keyed corridor.
17) I need a Sargent mortise lock but not the deadbolt, or a different function. Does the 8200 series cover it?
The 8200 series runs to 56 functions, including electromechanical, security, and monitoring versions, so storeroom, classroom, passage, office, and privacy variants all live in the same body and take the same door prep. That is the practical argument for standardizing a building on the 8200: one mortise pocket, one trim family, and you change function door by door. The 8247 specifically is the front door / apartment corridor function with the deadbolt.
18) What is the difference between the Sargent 8247 and the Corbin Russwin ML2003 mortise lock?
Function is the difference that decides it. The Corbin Russwin ML2003 is a Grade 1 mortise classroom lockset in the ML2000 Series for 1-3/4 inch doors, so the outside lever is locked and unlocked by key from the corridor side. The Sargent 8247-ET is a Grade 1 single-cylinder mortise lock with a Front Door/Apartment Corridor function and a deadbolt, keyed on one side. Specify the ML2003 for a classroom door on a keyed teacher-control plan and the 8247 for an apartment or tenant front door that needs the deadbolt.
19) Is there a mortise lock with a deadbolt other than the Sargent 8247 for a privacy or bed/bath door?
Yes. The Cal-Royal NM8440 is a Grade 1 privacy mortise lockset with a deadbolt for 1-3/4 inch doors, with a Privacy/Bed/Bath function. The Sargent 8247-ET also carries a deadbolt but is keyed single cylinder on a Front Door/Apartment Corridor function, so it is specified where a key must control entry. The NM8440 is the one to use when the deadbolt is thumbturn-operated privacy on a bath or bedroom door rather than a keyed tenant entry.
20) Can I use a Hager 3800 Series mortise lock in place of the Sargent 8247?
Only if the opening does not need to lock. The Hager 3850E is an Office function mortise lock with lever and escutcheon that is non-keyed at a 2-3/4 inch backset for doors 1-3/4 to 2-1/2 inch, and the Hager 3810E is a Passage mortise lock with escutcheon at the same backset and door range. The Sargent 8247-ET is keyed, single cylinder, with a deadbolt and a Front Door/Apartment Corridor function, so a non-keyed Hager will not carry the tenant entry security the 8247 is specified for. The Hager escutcheon models are a match for the same escutcheon-trim look on adjacent doors in the same corridor that only need latching.
21) Can I order just a mortise lock body instead of the complete Sargent 8247 lockset?
Yes, if the trim on the door is being reused. The BEST 45HCAC is a heavy duty mortise lock body with a Public Entrance function and field reversible operation, and the BEST 45HCAINL is a heavy duty mortise lockbody with an Intruder function. Both are supplied as bodies. The Sargent 8247-ET is a complete lockset with escutcheon trim, offered in LE1, LS, LW1 and WT escutcheons with A, B, E, F, J, L, P and W levers. Order the lock body route only when the existing escutcheon and lever match the new body's spindle and cylinder locations.
22) Does the Schlage LE Series mortise lock cover an apartment door the same way the Sargent 8247 does?
It covers apartment function but at a different grade. The Schlage Electronics LEBMB-ADD is a mobile-enabled mortise lock with push button and LED covering privacy, office and apartment functions, rated Grade 2 with a 3 hour fire rating for 1-3/4 inch doors. The Sargent 8247-ET is Grade 1 with a Front Door/Apartment Corridor function, heavy duty, and mechanical rather than mobile-enabled. If a facility spec calls out Grade 1 for the entry, the LEBMB-ADD does not satisfy it.
23) What finishes does the Sargent 8247 mortise lock come in, and can I match the brass and bronze on my other doors?
Sixteen finishes are offered on the 8247: 03 bright brass, 04 satin brass, 09 bright bronze, 10 satin bronze, 10B dark oxidized satin bronze oil rubbed, 10BE dark oxidized satin bronze, 10BL dark oxidized satin bronze clear coated, 14 bright nickel, 15 satin nickel, 20D dark statuary bronze lacquered, 26 bright chrome, 26D satin chrome, 32 bright stainless, 32D satin stainless, BSP black suede powder coat, and WSP white suede powder coat. For a building already standardized on satin chrome, 26D is the match; for satin stainless, 32D. Powder coat black and white are there when the spec calls for a painted finish rather than a plated one.
24) Is there a lighter duty mortise latch alternative to the Sargent 8247 for an interior door?
The Codelocks CL2255 is an electronic tubular mortise latch in a brushed steel finish, rated Medium Duty in the CL2000 Series. It suits an interior office or storage door where credential control is wanted without heavy commercial cycle demands. The Sargent 8247-ET is a heavy duty Grade 1 mechanical lockset built for a front door or apartment corridor opening, so the two are not interchangeable on a high-traffic entry.
How fast can I get the Sargent 8247 LE1A 26D 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 Sargent 8247 LE1A 26D come with a warranty?
Absolutely. The Sargent 8247 LE1A 26D 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 Sargent 8247 LE1A 26D?
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