Sargent 8291 Heavy Duty Single...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,725.69
$1,230.88
Sargent Sargent 8200 Series - (8291) All Purpose Holdback Lock Function Rose Trim, Heavy Duty Single Cylinder Mortise Lock, Grade 1 SGT-8291

Sargent 8291 Heavy Duty Single Cylinder Mortise Lock with All Purpose Holdback Function

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Model: 8291 EA 26D
From the 8200 Series Collection
$1,725.69
$1,230.88
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Selected Rose is
Selected Lever is

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

$1,725.69
$1,230.88
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Sargent 8291 Heavy Duty Single Cylinder Mortise Lock with All Purpose Holdback Function and Grade 1 Rating

Industry Benchmark Mortise Lock with Maximum Security and Performance

The Sargent 8291 heavy duty single cylinder mortise lock represents the industry benchmark for commercial mortise locks, delivering maximum security, performance, and durability with high-quality components. This Grade 1 operational rated lock features 2 3/4" backset depth and 1 3/4" door thickness compatibility with field reversible handing. The multi-functional lock body integrates with all SARGENT key systems including Degree, Signature, KESO, and XC, and is UL 10C fire-rated up to 3 hours with comprehensive ANSI/BHMA A156.13 Series 1000 certification.

Professional Features & Benefits

  • Exceptional Durability Testing: UL Cycle Above and Beyond test completed at 16 million cycles (Verification ID: V584148) for unmatched reliability in high-traffic commercial applications.
  • Grade 1 Operational Rating: Robust lever-style design with patented construction provides maximum strength and security performance for demanding commercial environments.
  • Precise Door Compatibility: 2 3/4" backset depth and 1 3/4" door thickness specifications ensure proper fit and function in standard commercial door preparations.
  • EcoFlex Energy Technology: Electromechanical version operates from 12 to 24VDC with EcoFlex technology reducing power consumption up to 96% for significant energy savings.
  • Universal Key System Integration: Compatible with all SARGENT key systems (Degree, Signature, KESO, and XC) for flexible master keying and security management.
  • Multi-Functional Design: Available in 56 different functions including electromechanical, security and monitoring options with on-site function switching capability.
  • Fire Safety Compliance: UL 10C fire-rated up to 3 hours with positive pressure certification and NFPA 80 compliance for critical fire door applications.
  • Extended Warranty Protection: 10-year limited warranty with 2-year coverage on electrical components for long-term reliability assurance.

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 any configurable options per application requirements.
  6. Restore power and test all functions including normal operation, alarm/alert functions, and integration with connected 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
  • 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 in independent UL testing. The 10-year limited warranty with 2-year electrical component coverage provides exceptional protection for demanding commercial applications. Engineered as the industry benchmark for mortise locks, this system combines maximum security with energy-efficient EcoFlex technology for dependable performance where reliability is essential.

Manufacturer Resources

SARGENT Full Line Catalog

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:
All Purpose Holdback
Product Type:
Mortise Locks
Duty Level:
Heavy Duty
Handle Type:
Lever
Product Attribute:
Mortise Locks
Electronic:
No
Product Function:
All Purpose Holdback
Product Category:
Mechanical Locks
Collection:
8200 Series
Department:
Door Hardware

Sargent 8291 EA 26D – Frequently Asked Questions

1) Will the Sargent 8291 mortise lock fit a 1-3/4 inch commercial door?
Yes. The Sargent 8291 is built for 1-3/4 inch door thickness with a 2-3/4 inch backset, which is the standard commercial mortise prep. If your doors are thicker or thinner than 1-3/4 inches, this is not the right body for them.
2) Do I need to order the Sargent 8291 handed for a left or right hand door?
No. The 8291 lock body is field reversible, so one part number covers both hands and a locksmith can set handing on site. That matters for a property manager stocking spares across a building with mixed swings.
3) What does the All Purpose Holdback function on the Sargent 8291 actually do?
All Purpose Holdback is the 8291's function: a single cylinder keyed mortise lock with a lever that can be held back so the latch stays retracted for free passage, then returned to a latching, secured state. It is a keyed function, so you get key control on the outside while still being able to hold the opening free during business hours.
4) Can the Sargent 8291 go on a 3 hour fire rated door?
Yes. The 8291 is UL 10C fire rated up to 3 hours with positive pressure certification and is NFPA 80 compliant, so it is usable on rated openings in stairwells, corridors and tenant separations.
5) Is the Sargent 8200 mortise lock heavy duty enough for a high traffic school or hospital entrance?
It is Grade 1 heavy duty and certified to ANSI/BHMA A156.13 Series 1000, the mortise lock standard. Sargent also completed UL Cycle Above and Beyond testing at 16 million cycles on the 8200 body, which is why it gets specified on education, healthcare and government openings that see constant use.
6) What do I have to specify when ordering a Sargent 8291 mortise lock?
Four choices. 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 a specific key code (pick None if you ordered less cylinder). Then the lever style (A, B, E, F, J, L, P or W) and the rose (E at 3-1/16 inch, L at 3-1/2 inch, LN at 2 inch, or O at 2-3/4 inch), plus finish.
7) Will the Sargent 8291 work on our existing master key system?
The 8291 accepts all SARGENT key systems, including Degree, Signature, KESO and XC, so it can be brought into an existing Sargent masterkey hierarchy. If you use interchangeable cores, order the 70 prep for small format or the 60 prep for large format and supply your own cores. Less cylinder is also available if your locksmith is pinning on site.
8) What is the closest Grade 1 mortise equivalent to the Sargent 8291 from another manufacturer?
For a Grade 1 heavy duty mortise lock body in a comparable class, the Accentra 8805FL from the 8800 Series is a Grade 1 mortise lock in storeroom function, and the Corbin Russwin ML2003 in the ML2000 Series is a Grade 1 mortise lockset in classroom function for 1-3/4 inch doors. Note the function difference: the Sargent 8291 is an all purpose holdback function single cylinder mortise lock, so those peers change how the outside lever behaves rather than simply substituting for it.
9) I need a storeroom function mortise lock instead of holdback - what should I order?
The Sargent 8291 is an all purpose holdback function lock, where the latch can be held retracted. If you need a straight storeroom function - outside lever always locked, key retracts the latch - the Cal-Royal NM8080 is a Grade 1 storeroom mortise lockset for 1-3/4 inch doors with an interchangeable core option, and the Accentra 8805FL is a Grade 1 storeroom mortise lock.
10) What mortise lock should I use on a classroom door instead of the 8291?
The 8291 is a single cylinder all purpose holdback lock and does not provide classroom lockdown behavior. For classroom openings, the Cal-Royal NM8070 is a Grade 1 classroom mortise lockset with auxiliary deadlatch for 1-3/4 inch doors, the Corbin Russwin ML2003 is a Grade 1 classroom mortise lockset, and the Marks USA LA318GJ is a Grade 1 classroom security indicator mortise lockset with ANSI strike for 1-3/4 inch doors.
11) I want keypad or credential access on this opening - what replaces the Sargent 8291?
The 8291 is a mechanical, non-electronic lock. For access control at the door, the TownSteel FME-2000 is a Grade 1 mortise lockset with RFID technology for 1-3/4 inch doors, the Schlage CO-100 is a Grade 1 standalone electronic mortise lock with keypad reader, and the Accentra NTM623-NR nexTouch is a Grade 1 mortise lock with a capacitive touchscreen keypad and cylinder override.
12) Can I use an electrified mortise lock in place of the Sargent 8291 for an access control tie-in?
For a wired electrified mortise body, the Command Access ML190 is a heavy-duty motorized mortise lock with field selectable EL/EU operation at 24VDC in storeroom function, the BEST 45HW is a heavy duty wired electromechanical mortise lock with 12V/24V operation, and the Schlage L9092EU with 03A trim is a heavy duty electric lock/unlock outside lever mortise lock at 12/24VDC with request to exit. The Sargent 8291 itself is a mechanical, non-electronic lock.
13) Which mortise products look like a substitute for the Sargent 8291 but will not work as one?
Several mortise-labeled items are not functional replacements for a keyed 8291. The Schlage L0170 and the Emtek 3102 Memphis are dummy trim - no latch, no key. The Kaba Ilco 185 Series is a deadbolt function mortise lock, which bolts but does not latch a lever. The Marks USA 21AC is an ornamental iron mortise lock for 1 inch doors, a different door thickness class entirely. The Sargent 8291 is a keyed single cylinder mortise lockset with lever trim.
14) What mortise lock should I use for a behavioral health or ligature resistant opening instead of the 8291?
The Sargent 8291 uses conventional lever trim in A, B, E, F, J, L, P and W lever styles, which is not ligature resistant. For those openings, the TownSteel MRX-L-01 is a Grade 1 heavy duty anti-ligature lever mortise lockset in passage function for 1-3/4 inch doors, the MRX-A-01 is the same function with satin stainless ligature resistant arch trim, and the Marks USA 5PDN is a Grade 1 ligature resistant hospital passage push/pull paddleset.
15) Which rose size should I pick for a narrow stile aluminum or a glass framed door?
Go with the LN rose at 2 inches (51mm), the smallest of the four. The O rose is 2-3/4 inches (67mm), the E rose 3-1/16 inches (78mm) and the L rose 3-1/2 inches (89mm). On a narrow face the larger roses can run past the stile edge, so measure the flat face before committing.
16) Is the Sargent 8291 an electronic lock, and can I get an electrified version?
The 8291 as configured here is mechanical, not electronic. The 8200 platform does offer electromechanical versions running 12 to 24VDC with EcoFlex technology, and the family covers 56 functions including electromechanical, security and monitoring options. If you need an electrified mortise lock instead, the BEST 45HW wired electromechanical mortise lock runs 12V/24V, and the Command Access ML190 is a motorized mortise lock with field selectable EL/EU operation on 24VDC.
17) Can I use a Sargent 8291 mortise lock to replace a cylindrical lockset on an existing door?
Not directly. A mortise lock needs a pocket cut into the door edge plus face prep for the trim, while a cylindrical lock uses a bored hole. Swapping from bored to mortise means re-prepping the door and the frame strike. If the door is already bored, a cylindrical Grade 1 lock such as the Schlage PC Series is the straight swap; if the door already has a mortise pocket with a 2-3/4 inch backset, the 8291 drops into it.
18) If the door does not need to be keyed, is there a simpler mortise lock than the Sargent 8291?
Yes. The 8291 is a keyed single cylinder lock, so if the opening only needs latching with no locking, a non-keyed mortise is the simpler buy: the Schlage PM010 is a Grade 1 passage latch mortise lock, the Falcon MA101 is a Grade 1 heavy duty mortise passage lock with field reversible operation, and the Hager 3810S is a passage mortise lock with rose and 2-3/4 inch backset.
19) Is a cylindrical lock an option instead of the Sargent 8291 mortise lock?
Only if the door is prepped for it. The 8291 requires a mortise pocket in the door edge. A cylindrical lock such as the Schlage PC10, a Grade 1 passage cylindrical lock with rose for 1-3/4 inch doors, uses bored holes instead and is not interchangeable with a mortise prep without modifying the door.
20) Is there a heavy duty mortise alternative to the Sargent 8291 for an entrance or office door?
Yes. For office or entrance function, the Cal-Royal NM8050 is a Grade 1 heavy duty office/entrance mortise lockset with auxiliary deadlatch for 1-3/4 inch doors, and the Hager 3850E is an office mortise lock with lever and escutcheon, non-keyed, with a 2-3/4 inch backset for doors 1-3/4 to 2-1/2 inches. The Sargent 8291 differs in being a keyed single cylinder all purpose holdback lock.
21) What is the difference between the Sargent 8291 and a BEST 45H mortise lock body?
Both are heavy duty mortise locks. The Sargent 8291 is a Grade 1 keyed single cylinder lock in all purpose holdback function, sold with lever trim in E, L, LN and O rose sizes. The BEST 45HCAC is a heavy duty mortise lock body in public entrance function with field reversible operation, and the 45HCAINL is a heavy duty mortise lockbody in intruder function - both are lock bodies, so trim is specified separately.
22) What are the finish options on the Sargent 8200 mortise lock, and can I match existing brass or stainless hardware?
Sixteen finishes are offered: 03 bright brass, 04 satin brass, 09 bright bronze, 10 satin bronze, 10B oil rubbed dark oxidized bronze, 10BE, 10BL, 14 bright nickel, 15 satin nickel, 20D dark statuary bronze, 26 bright chrome, 26D satin chrome, 32 bright stainless, 32D satin stainless, plus BSP black suede and WSP white suede powder coat. For most commercial buildings 26D and 32D are the two that match existing hardware.
How fast can I get the Sargent 8291 EA 26D delivered?
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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 8291 EA 26D come with a warranty?
Absolutely. The Sargent 8291 EA 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 8291 EA 26D?
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