Sargent 8252 Institution Deadb...
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$1,890.51
$1,443.89
Sargent Sargent 8200 Series - (8252) Institution Deadbolt Function Rose Trim, Heavy Duty Double Cylinder with Deadbolt Mortise Lock, Grade 1 SGT-8252

Sargent 8252 Institution Deadbolt Function Mortise Lock with Heavy Duty Double Cylinder and Grade 1 Rating

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Model: 8252 EA 26D
From the 8200 Series Collection
$1,890.51
$1,443.89
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,890.51
$1,443.89
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Sargent 8252 Institution Deadbolt Function Mortise Lock with Heavy Duty Double Cylinder and Grade 1 Rating

Industry Benchmark Mortise Lock with Maximum Security and Performance

The Sargent 8252 Institution Deadbolt Function mortise lock delivers maximum security, performance, and durability as the industry benchmark for commercial mortise locks. This Grade 1 heavy-duty lock features a 2 3/4" backset, 1 3/4" door thickness compatibility, and 3/4" latchbolt throw with field reversible handing. 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 and UL 10C 3-hour fire rating requirements.

Professional Features & Benefits

  • Standard Door Compatibility: 2 3/4" backset depth with 1 3/4" door thickness and 3/4" latchbolt throw for standard commercial door preparations.
  • Exceptional Durability Testing: UL Cycle Above and Beyond test completed at 16 million cycles (Verification ID: V584148) for unmatched reliability in high-traffic institutional applications.
  • Flexible Power Options: Electromechanical version operates from 12 to 24VDC with EcoFlex technology reducing power consumption up to 96% for energy-efficient operation.
  • Heavy-Duty Construction: Grade 1 operational rating with robust lever-style design engineered to far exceed independently verified testing standards.
  • Universal Key System Integration: Compatible with all SARGENT key systems including Degree, Signature, KESO, and XC for flexible master keying options.
  • Field Reversible Configuration: Handing can be changed on-site without additional parts, reducing inventory requirements and installation complexity.
  • Comprehensive Fire Rating: UL 10C positive pressure fire-rated up to 3 hours with NFPA 80 compliance for critical fire safety applications.
  • 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) 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 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

  • Healthcare Institutions and Behavioral Health Facilities
  • Educational Facilities and Universities
  • Government and Municipal Buildings
  • Commercial Office Buildings
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • High-Security Commercial Applications

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 institutional applications. Engineered as the industry benchmark where maximum security, performance, and durability are essential for critical access control requirements.

Product Specs

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

Sargent 8252 EA 26D – Frequently Asked Questions

1) What does the institution deadbolt function on the Sargent 8252 actually do?
The 8252 is a double cylinder institution deadbolt: a key is required from both sides to throw or retract the deadbolt, and the levers are rigid, they do not retract any latch. There is no latchbolt operation from the lever, so the opening is controlled entirely by key. That is why it gets specified for behavioral health, utility rooms, and other spaces where free egress by handle is not wanted.
2) Will the Sargent 8252 mortise lock fit my existing 1-3/4 inch commercial door prep?
Yes for a standard commercial prep. The 8252 uses a 2-3/4 inch backset and is built for 1-3/4 inch door thickness, which is the standard ANSI mortise pocket on commercial doors. Latchbolt throw is 3/4 inch, so it works with a standard ANSI strike.
3) Do I have to specify handing when ordering the Sargent 8252?
No. Handing on the 8252 is field reversible, changed on site without extra parts. Stocking one lock for left and right hand openings is one of the reasons institutional facilities standardize on it.
4) Can the Sargent 8252 go on a fire rated door?
Yes. The 8252 carries a UL 10C positive pressure fire rating up to 3 hours and is NFPA 80 compliant. It also meets ANSI/BHMA A156.13 Series 1000 and is Grade 1.
5) Does the Sargent 8252 come with cylinders, and can I get it prepped for my existing interchangeable core system?
Cylinder is a required choice at order. You can take standard cylinders, order it less cylinder, or get it prepped for cores: 70 for small format interchangeable core less core, 60 for large format interchangeable core less core. Keying is also a required selection, keyed different, keyed alike, or to a specific key code, and you pick none if you ordered it less cylinder. The lock body works with all SARGENT key systems including Degree, Signature, KESO, and XC.
6) What is a comparable Grade 1 mortise lock if I need a storeroom function instead of an institution deadbolt?
The Sargent 8252 is an institution deadbolt function mortise lock, which is a double cylinder keyed function with a deadbolt operated by key from both sides. If the opening needs a storeroom function instead - key retracts the latch outside, inside always free - the Accentra 8805FL is a Grade 1 storeroom mortise lock in the 8800 Series, and the Cal-Royal NM8080 is a Grade 1 storeroom mortise lockset for 1-3/4 inch doors with an interchangeable core option.
7) Is there a behavioral health alternative to the Sargent 8252 with ligature resistant trim?
The Sargent 8252 uses lever trim with A, B, E, F, J, L, P and W lever styles on E, L, LN or O roses. Where the behavioral health opening calls for anti-ligature trim instead, the TownSteel MRX-L-01 is a Grade 1 heavy duty anti-ligature lever mortise lockset in stainless steel, the MRX-A-01 uses ligature resistant arch trim, and the Marks USA 5PDN is a Grade 1 hospital passage mortise push/pull paddleset that is ligature resistant and ADA compliant. Note those three are passage function, not a keyed deadbolt.
8) I need a classroom function mortise lock, not an institution deadbolt - what should I order?
The Sargent 8252 is an institution deadbolt function lock and does not provide classroom operation. For a classroom opening, the Corbin Russwin ML2003 is a Grade 1 mortise classroom lockset for 1-3/4 inch doors in the ML2000 Series, and the Cal-Royal NM8070 is a Grade 1 classroom mortise lockset with auxiliary deadlatch for 1-3/4 inch doors.
9) I need an electrified mortise lock for access control - what replaces the Sargent 8252 on that opening?
The Sargent 8252 as configured here is a mechanical lock. For an access control tie-in on a mortise prep, the BEST 45HW is a heavy duty wired electromechanical mortise lock with 12V/24V operation, the Command Access ML190 is a heavy-duty motorized mortise lock with field selectable EL/EU operation at 24VDC in storeroom function, and the Schlage L9092EU with 03A trim is a heavy duty electric lock/unlock outside lever mortise lock, keyed outside, with request to exit at 12/24VDC.
10) What mortise lock should I use for a classroom intruder or lockdown application instead of the Sargent 8252?
The Sargent 8252 is an institution deadbolt function keyed from both sides. For lockdown from inside the room, the BEST 45HCAINL is a heavy duty mortise lockbody with intruder function, the TownSteel FME-4000 is an electronic intruder classroom mortise lockset with RFID rated Grade 1 for 1-3/4 inch doors, and the Marks USA LA318GJ is a Grade 1 classroom security indicator mortise lockset with ANSI strike and steel escutcheon for 1-3/4 inch doors.
11) How many cycles is the Sargent 8200 mortise lock tested to for high traffic doors?
Sargent completed UL Above and Beyond cycle testing on the 8200 Series at 16 million cycles, verification ID V584148. For a dormitory corridor, a hospital wing, or a municipal building where the door swings all day, that is the number to put on the submittal.
12) What lever and rose combinations can I order to match the other Sargent doors in my building?
Eight lever designs are offered, A, B, E, F, J, L, P and W, on four rose sizes: 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). Sixteen finishes run from 03 bright brass and 04 satin brass through 26D satin chrome and 32D satin stainless to BSP black and WSP white suede powder coat. Match the lever, rose and finish codes off an existing lock to keep a floor consistent.
13) Is the Sargent 8252 an electronic lock, and does it need wiring?
No. The 8252 as configured here is a mechanical, non electronic lock, so there is no power supply, transformer or wiring to run. Sargent does build an electromechanical version of the 8200 body that runs on 12 to 24VDC with EcoFlex, but that is a different order configuration.
14) My door is thicker than 1-3/4 inches. Can I still use the Sargent 8252?
The 8252 is specified at 1-3/4 inch door thickness. For thicker stock, the Hager 3800 Series mortise locks cover 1-3/4 to 2-1/2 inches on passage and office functions, and the Baldwin 6301 and 6310 mortise lock bodies are listed for 1-3/4 inch and over on a 2-1/2 inch backset. Those are different functions, so confirm the function you need is available before switching.
15) What is the electronic equivalent if I want keypad or credential access instead of the mechanical Sargent 8252?
The Sargent 8252 is a mechanical, non-electronic mortise lock. For credential-based access on a mortise prep, the Schlage CO-100 is a Grade 1 standalone electronic mortise lock with keypad reader for 1-3/4 inch doors, the TownSteel FME-2000 is a Grade 1 heavy duty classroom mortise lockset with RFID, and the Accentra nexTouch NTM623-NR uses a capacitive touchscreen keypad with cylinder override and no deadbolt.
16) The Sargent 8252 is keyed both sides - what is a simpler non-keyed option for the same mortise prep?
The Sargent 8252 is keyed with a double cylinder function. On openings that only need latching with no key control, the Falcon MA101 is a Grade 1 heavy duty fire rated mortise passage lock with field reversible operation, the Schlage PM010 is a Grade 1 non-keyed passage latch mortise lock for 1-3/4 inch doors, and the Hager 3810S is a Grade 1 passage mortise lock with rose and a 2-3/4 inch backset.
17) Which mortise locks look like an alternative to the Sargent 8252 but will not work as a secured institutional opening?
Several mortise-prepped products share the shape but not the function of the Sargent 8252, which is a keyed double cylinder institution deadbolt. The Schlage L0170 and the Emtek 3102 Memphis, 3104 Hamilton and 3106 Manhattan are dummy function trims with no latching or locking mechanism. The Hager 3840S and Cal-Royal NM8440 are privacy/bed/bath function, released from inside rather than key controlled. The Kaba Ilco BR Series is a glass door bottom rail lock rather than a lock for a standard door prep.
18) If I only need a deadbolt and no lever, what is an alternative to the Sargent 8252?
The Sargent 8252 pairs a deadbolt with lever trim as a lever-handled mortise lock. For a deadbolt-only opening, the Kaba Ilco 185 Series is a deadbolt function mortise lock supplied with no handing, and the Alarm Lock DL4500 is a Grade 1 electronic mortise deadbolt with 2,000 user codes and privacy keypad for doors 1-5/8 to 1-7/8 inch thick.
19) Are there residential-style mortise lock bodies that can stand in for the Sargent 8252?
The Sargent 8252 is a commercial Grade 1 heavy duty mortise lock. The Baldwin 6301LS entry/apartment and 6310190RRLS entry/storeroom are lever-by-lever mortise lock bodies with a 2-1/2 inch backset, and the Marks USA 21AC and 22AC are ornamental iron entrance double cylinder mortise locks for 1 inch doors. Those backsets and door thicknesses differ from the 8252's 2-3/4 inch backset and 1-3/4 inch door, so they are not a drop-in for the same prep.
20) Is there an installation template for prepping the door for a Sargent 8200 mortise lock?
Yes. Sargent publishes a 7800/8200 Series mortise lock installation template covering all sectional rose trims and escutcheon trims, plus the full 7800/8200 mortise lock catalog for trim and function detail. Pull the template before you cut the pocket and cross bores.
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Does the Sargent 8252 EA 26D come with a warranty?
Absolutely. The Sargent 8252 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 8252 EA 26D?
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