Sargent 8243 Apartment Corrido...
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$1,773.66
$1,247.54
Sargent Sargent 8200 Series - (8243) Apartment Corridor Function Rose Trim, Heavy Duty Single Cylinder with Deadbolt Mortise Lock, Grade 1 SGT-8243

Sargent 8243 Apartment Corridor Function Mortise Lock with Heavy Duty Single Cylinder Deadbolt - Grade 1

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Model: 8243 EA 26D
From the 8200 Series Collection
$1,773.66
$1,247.54
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Sargent 8200 Series Apartment Corridor Mortise Lock with Heavy Duty Single Cylinder Deadbolt - Grade 1 Commercial

Industry Benchmark Heavy Duty Mortise Lock with Maximum Security Performance

The Sargent 8200 Series mortise lock represents the industry benchmark for maximum security, performance, and durability in commercial door hardware. This apartment corridor function model features a heavy duty single cylinder with deadbolt configuration, delivering Grade 1 operational performance with a 2 3/4" backset and 3/4" latchbolt throw for 1 3/4" door thickness. The multi-functional lock body integrates with all Sargent key systems including Degree, Signature, KESO, and XC, while meeting ANSI/BHMA A156.13 Series 1000 standards with UL 10C fire rating up to 3 hours.

Professional Features & Benefits

  • Standard Door Specifications: Designed for 1 3/4" door thickness with 2 3/4" backset depth and 3/4" latchbolt throw for reliable operation and secure latching.
  • Exceptional Durability Rating: UL Cycle Above and Beyond test completed at 16 million cycles (Verification ID: V584148) for unmatched longevity in high-traffic commercial applications.
  • EcoFlex Technology: Electromechanical version operates from 12 to 24VDC with EcoFlex technology reducing power consumption up to 96% for energy-efficient access control integration.
  • Heavy-Duty Construction: Patented design and construction with high-quality components engineered to far exceed independently verified testing standards.
  • Universal Key System Compatibility: Integrates with all Sargent key systems (Degree, Signature, KESO, and XC) with 6 pin or 7 pin cylinder options for flexible master keying.
  • Comprehensive Fire Rating: UL 10C positive pressure fire-rated up to 3 hours with NFPA 80 compliance for critical fire safety applications.
  • Field Reversible Handing: Convenient field reversible configuration reduces inventory requirements and simplifies installation planning.
  • Extended Warranty Coverage: 10-year limited warranty with 2-year coverage on electrical components for long-term protection and confidence.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Installation & Operation

  1. Verify electrical requirements match available power supply. Confirm voltage (12 to 24VDC for electromechanical version) and current capacity before proceeding.
  2. Disconnect power supply before beginning installation. Follow all applicable electrical codes and safety procedures.
  3. Mount the unit in the specified location ensuring adequate clearance for wiring access, ventilation, and future service requirements.
  4. Route and connect wiring according to manufacturer wiring diagrams. Use appropriate wire gauge and connectors for the application.
  5. Configure operational settings including field reversible handing and any configurable options per application requirements.
  6. Restore power and test all functions including normal operation, deadbolt engagement, and integration with connected access control systems.
  7. Complete final inspection and document settings. Refer to manufacturer documentation for complete wiring diagrams, programming instructions, and troubleshooting.

Professional Applications

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

Why Choose Sargent Quality?

Sargent 8200 Series mortise locks deliver professional-grade reliability with patented design and construction rated for 16 million cycles in UL testing. The 10-year limited warranty with 2-year electrical component coverage provides exceptional protection for demanding commercial applications. Engineered with high-quality components and comprehensive certifications including ANSI/BHMA Grade 1, UL 10C fire rating, and ADA compliance, this lock represents the strongest and most durable mortise lock solution where dependable performance is 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:
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 8243 EA 26D – Frequently Asked Questions

1) Will the Sargent 8243 mortise lock fit a 1-3/4 inch door with a 2-3/4 inch backset?
That's exactly what it's built for. The 8243 uses a 2-3/4 inch backset and is specified for 1-3/4 inch door thickness, which is the standard commercial door. The latchbolt throws 3/4 inch. If your doors are thicker than 1-3/4 inches, this isn't the right call out.
2) Will the Sargent 8243 latch into the strike that's already in my frame?
The latchbolt throws 3/4 inch from a 2-3/4 inch backset, so it wants a standard ANSI mortise strike prep. If the door already carries a mortise lock on a 2-3/4 inch backset, the pocket and face prep line up. Coming off a bored lock, it doesn't: a mortise body needs a milled pocket in the door edge, not a 2-1/8 inch cross bore. The installation template PDF gives the prep dimensions to check against your frame before you cut.
3) Can I use the Sargent 8243 on a fire rated apartment entry door?
Yes. The 8200 mortise lock is UL 10C positive pressure fire rated up to 3 hours and NFPA 80 compliant, which covers a typical 90 minute or 3 hour rated unit entry off a corridor. It also carries ANSI/BHMA A156.13 Series 1000 Grade 1.
4) What do I have to specify when ordering a Sargent 8243 mortise lock?
Four choices decide the part. Cylinder: standard cylinder, less cylinder, 70 prep for small format interchangeable core less core, or 60 prep for large format IC less core. Keying: keyed different, keyed alike, or to a key code (pick none if you ordered less cylinder). Lever: A, B, E, F, J, L, P or W. Rose: E at 3-1/16 inches, L at 3-1/2 inches, LN at 2 inches, or O at 2-3/4 inches. Then the finish.
5) Can the Sargent 8243 be keyed into the master key system already running in my building?
It works with all Sargent key systems, including Degree, Signature, KESO and XC, with 6 pin or 7 pin cylinder options. If the building is already on a Sargent system, order it keyed alike or to your key code. If your keying is done by a locksmith, the 60 and 70 prep options ship less core for large or small format interchangeable core, so the core gets pinned and dropped in on site.
6) Is the Sargent 8243 an electronic lock, or do I need something else for access control?
The 8243 is mechanical, key operated only. If the opening needs credential access, look at an electrified or electronic mortise instead: the BEST 45HW is a wired electromechanical mortise body running 12V/24V, the Command Access ML190 is a motorized mortise with field selectable fail safe or fail secure on 24VDC, and the Schlage LEMD-GRW is a Grade 1 ENGAGE wireless mortise with a 125kHz proximity reader.
7) Is the Sargent 8243 apartment corridor lock the wrong choice for a classroom or storeroom door?
Yes, wrong function. Apartment corridor pairs a latch with a separate deadbolt, which is not what a classroom or storeroom opening wants. For a classroom, the Corbin Russwin ML2003 is Grade 1 mortise classroom function, and Cal-Royal NM8070 is a Grade 1 classroom mortise lockset for 1-3/4 inch doors. For storeroom, look at the Accentra 8805FL Grade 1 storeroom mortise or the Cal-Royal NM8080. Sargent's own 8200 line runs other functions too, so if you want to stay on one key system, order the 8200 in the function the door calls for.
8) What is the closest cross-brand equivalent to a Sargent 8243 apartment corridor mortise lock?
The Sargent 8243 is a Grade 1 mortise lock in the 8200 Series with an apartment corridor function and a single-cylinder keyed deadbolt. The nearest peer by function name is the Baldwin 6301LS, an entry/apartment mortise lock body in a lever-by-lever configuration for doors 1-3/4 inch and over. The Baldwin 6301 is the same entry/apartment function in a knob-by-knob configuration for the same door thickness range, so it suits an opening keeping knob trim rather than levers. The Sargent is offered with lever trim across A, B, E, F, J, L, P and W lever styles.
9) If the opening does not need a deadbolt, what mortise lock replaces a Sargent 8243?
The Sargent 8243 pairs its apartment corridor function with a single-cylinder deadbolt. Where the deadbolt is not wanted, the Cal-Royal NM8050 is a Grade 1 entrance/office mortise lockset with an auxiliary deadlatch for 1-3/4 inch doors, and the Cal-Royal NM8080 is a Grade 1 storeroom mortise lockset for 1-3/4 inch doors with an interchangeable core option. The Accentra 8805FL is a Grade 1 storeroom mortise lock in the 8800 Series supplied with an Arcadia lever.
10) Do I have to order the Sargent 8243 handed, or can I reverse it on site?
Handing is field reversible, so one part number covers left and right hand openings. For a property manager stocking spares across a building, that means a single lock on the shelf fits any unit door regardless of swing.
11) How long will a Sargent 8200 mortise lock last on a high traffic apartment corridor door?
It completed UL's Above and Beyond cycle test at 16 million cycles, verification ID V584148. Grade 1 heavy duty on its own means 1,000,000 cycles minimum under ANSI/BHMA, so this is well past the floor. On a unit entry or a corridor door that gets hit all day, that's the durability argument for a mortise body over a bored lock.
12) Should I use a mortise lock like the Sargent 8243 or a cylindrical lockset on apartment entry doors?
A mortise body sits in a milled pocket in the door edge and carries both a latch and a deadbolt in one case, which is why it's the standard on multi-family unit entries. A cylindrical lock like the Schlage PC10 installs into a bored hole and has no deadbolt in the body, so a second deadbolt would need its own prep and its own key. If the door is already mortise prepped, stay mortise. If it's bored and you don't want to remill the edge, a cylindrical plus a separate deadbolt is the path.
13) Which Sargent 8200 rose size do I need to cover the old trim marks on the door?
Four rose sizes are offered: LN at 2 inches (51mm), O at 2-3/4 inches (67mm), E at 3-1/16 inches (78mm), and L at 3-1/2 inches (89mm). If you're replacing older trim and there are witness marks or paint shadow on the face, the 3-1/2 inch L rose covers the most. Escutcheon trim is a separate call out from rose trim, and the installation template covers both.
14) Can I order the Sargent 8243 without a cylinder so my locksmith supplies the core?
Three ways to do it. Less Cylinder ships the lock with no cylinder at all. The 70 option gives small format interchangeable core prep, less core. The 60 option gives large format IC prep, less core. Pick keying "None" when you order less cylinder. Security integrators standardizing a site on their own core usually take 70 or 60 so the housing prep is right and only the core drops in.
15) Can a Kaba Ilco 185 mortise deadbolt be used instead of a Sargent 8243?
Only where the opening needs a deadbolt alone. The Kaba Ilco 185 Series is a mortise lock in a deadbolt function with no handing, sold in a single pack, so it throws a bolt but provides no latch or lever operation. The Sargent 8243 combines lever trim with a single cylinder and deadbolt in one apartment corridor lock body, which is what a unit entry door needs when it must latch on closing as well as bolt.
16) Is there an electronic version of the Sargent 8243 apartment corridor mortise lock, or a keypad alternative?
The mechanical 8243 is a non-electronic Grade 1 mortise lock. For an opening that needs codes or credentials in the same mortise prep, the Schlage Electronics LEBMB-ADD is a mobile-enabled mortise lock with push button and LED covering privacy, office and apartment functions, Grade 2, for 1-3/4 inch doors with a 3 hour fire rating. The Schlage Electronics LEMD-GRW is a Grade 1 ENGAGE Series wireless mortise lock with a 125kHz proximity reader and a mobile-enabled deadbolt with LED, Greenwich trim, right hand, also 3 hour fire rated. The Dormakaba E-Plex 5086 is a Grade 1 entry/egress electronic pushbutton and card mortise lock in a back-to-back configuration.
17) Will a Schlage L0170 or a Schlage PM010 work in place of a Sargent 8243?
Neither is a substitute for a keyed apartment corridor lock. The Schlage L0170 is a half dummy trim, a Grade 1 non-keyed lever for 1-3/4 inch doors that neither latches nor locks. The Schlage PM010 is a Grade 1 passage latch mortise lock, non-keyed, for 1-3/4 inch doors, so it latches but never locks. The Sargent 8243 is keyed with a single cylinder and a deadbolt, so an opening requiring key control needs a keyed lock body rather than either of these.
18) What is the difference between the Sargent 8243 and the Schlage L9092EU corridor mortise lock?
Both carry a corridor function and both are heavy duty. The Schlage 03A electric lock/unlock outside lever mortise lock is keyed outside with request to exit and runs on 12/24VDC for 1-3/4 inch doors, so it is wired into an access control system. The Sargent 8243 is a mechanical Grade 1 mortise lock with a single-cylinder deadbolt and lever trim, keyed and operated at the door without a power connection.
19) What replaces a Sargent 8243 on a bathroom or bedroom door in an apartment unit?
Inside the unit, an apartment corridor lock is the wrong function - those doors take privacy hardware. The Cal-Royal NM8440 is a Grade 1 privacy/bed/bath mortise lockset with a deadbolt for 1-3/4 inch doors, and the Hager 3840S is a Grade 1 privacy mortise lock with a 2-3/4 inch backset for doors 1-3/4 to 2 inch. The Sargent 8243 stays on the corridor door, where it is keyed with a single cylinder.
20) What mortise lock goes on the mechanical or storage rooms in the same building as Sargent 8243 apartment doors?
Back-of-house doors take a storeroom function rather than the apartment corridor function of the 8243. The Accentra 8805FL is a Grade 1 storeroom mortise lock in the 8800 Series with an Arcadia lever, and the Cal-Royal NM8080 is a Grade 1 storeroom mortise lockset for 1-3/4 inch doors with an interchangeable core option. For lobby and shared entry doors, the BEST 45HCA is a heavy duty mortise lock body in a public entrance function with field reversible operation. The 8243 itself is available in prep for small format or large format interchangeable core if the building is standardizing on a core system.
21) Which mortise lock suits a behavioral health or ligature resistant opening where a Sargent 8243 would not?
The 8243 uses conventional lever trim in A, B, E, F, J, L, P and W lever styles with E, L, LN and O roses, which is not the profile a ligature resistant opening calls for. The TownSteel MRX-L-01 is a Grade 1 heavy duty anti-ligature lever mortise lockset in stainless steel with a passage function for 1-3/4 inch doors, and the MRX-A-01 is the 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 in the 195 Series, ligature resistant and ADA compliant in satin stainless steel.
22) Is a Sargent 8243 the right lock for an aluminum storefront or narrow stile glass door?
No. The 8243 is a heavy duty mortise lock body sized for standard commercial swing doors with lever trim. Narrow stile and glass openings take different hardware: the Alarm Lock DL1300NW is a Trilogy Networx wireless electronic mortise lock with keypad made for Adams Rite deadlatches, the Dormakaba E-Plex 2066 is an electronic pushbutton keyless mortise lock for wide stile applications, and the Kaba Ilco BR Series is a glass door bottom rail lock.
23) How does the Sargent 8243 compare with a Hager 3800 Series mortise lock?
The Hager 3800 Series peers are non-keyed functions: the 3850E is a Grade 1 office mortise lock with lever and escutcheon, non-keyed, on a 2-3/4 inch backset for doors 1-3/4 to 2-1/2 inch, and the 3810E and 3810S are Grade 1 passage mortise locks on the same 2-3/4 inch backset, the 3810E with an escutcheon and the 3810S with a rose. The Sargent 8243 is keyed with a single cylinder and deadbolt in an apartment corridor function, ordered with a standard cylinder, less cylinder, or small or large format interchangeable core prep.
24) Can a cylindrical lock be used where a Sargent 8243 is specified?
Not without changing the door prep. The 8243 is a mortise lock, which needs a pocket cut into the door edge. The Schlage PC10 is a Grade 1 passage cylindrical lock, non-keyed with rose, for 1-3/4 inch doors, and it uses bored holes rather than a mortise pocket, so swapping between the two means new door prep as well as different hardware.
25) What mortise lock takes access control wiring where the Sargent 8243 is mechanical?
The 8243 is a mechanical Grade 1 apartment corridor lock. For openings tied into a wired access control system, the BEST 45HW Series is a heavy duty wired electromechanical mortise lock with 12V/24V operation, and the Command Access ML190 is a heavy-duty motorized mortise lock in a storeroom function with field selectable EL/EU operation and 24VDC power. Either replaces the mechanical lock body where the door must be released remotely.
26) Which mortise lock adds intruder lockdown where a Sargent 8243 does not?
The 8243 is an apartment corridor function with a single-cylinder deadbolt, not a lockdown lock. Where a room must be secured from inside on demand, the BEST 45HCA is a heavy duty mortise lockbody with an intruder function, and the TownSteel FME-4000 Series is a Grade 1 heavy duty electronic intruder classroom mortise lockset with RFID technology for 1-3/4 inch doors. The TownSteel FME-2000 Series is a Grade 1 heavy duty classroom mortise lockset with RFID for 1-3/4 inch doors where the intruder function is not required.
27) What finishes does the Sargent 8243 mortise lock come in to match the rest of my building?
Sixteen finishes, covering the usual commercial calls (26D satin chrome, 32D satin stainless, 10B oil rubbed bronze) plus brass and bronze in bright and satin, 14 and 15 nickel, 20D dark statuary bronze, 26 bright chrome, 32 bright stainless, and black or white suede powder coat. If you're matching existing openings, match on the finish code rather than the description.
28) Are the Emtek Brisbane and Manhattan mortise entrance locksets alternatives to a Sargent 8243?
They are not. The Emtek 3019 Brisbane, 3102 Memphis, 3104 Hamilton and 3106 Manhattan mortise entrance locksets are all dummy function, meaning they are fixed trim with no latching or locking mechanism, typically used on the inactive leaf of a pair. The Sargent 8243 is a keyed Grade 1 apartment corridor lock with a single cylinder and deadbolt.
29) What is the difference between a Sargent 8243 and a Codelocks CL2255 for an apartment building door?
The Codelocks CL2255 is a medium duty electronic tubular mortise latch in the CL2000 Series, supplied in a brushed steel finish. The Sargent 8243 is a heavy duty Grade 1 commercial mortise lock with a single cylinder and deadbolt, offered across sixteen finishes including 26D satin chromium plated over nickel, 32D satin stainless steel, 10B dark oxidized satin bronze oil rubbed, and BSP black suede powder coat. Duty level is the deciding factor on a high-traffic unit entry door.
30) Is an Alarm Lock DL4500 electronic deadbolt a substitute for a Sargent 8243?
They cover different jobs. The Alarm Lock DL4500 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, a bolt-only device. The Sargent 8243 combines an apartment corridor latch with a keyed single-cylinder deadbolt in one heavy duty Grade 1 body for 1-3/4 inch doors, so the door still latches on closing when the bolt is retracted. Alarm Lock also lists the DL2700CR Grade 1 classroom mortise lock with weatherproof design and the DL3500CR Grade 1 with 300 user codes, both classroom function for the same 1-5/8 to 1-7/8 inch range.
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Does the Sargent 8243 EA 26D come with a warranty?
Absolutely. The Sargent 8243 EA 26D is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
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