Sargent 8239 Classroom Securit...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,890.51
$1,438.84
Sargent Sargent 8200 Series - (8239) Classroom Security Intruder Function Rose Trim, Heavy Duty Double Cylinder with Deadbolt Mortise Lock, Grade 1 SGT-8239

Sargent 8239 Classroom Security Intruder Function Mortise Lock with Heavy Duty Double Cylinder and Deadbolt

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Model: 8239 EA 26D
From the 8200 Series Collection
$1,890.51
$1,438.84
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,890.51
$1,438.84
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Sargent 8200 Series Classroom Security Intruder Function Mortise Lock with Heavy Duty Double Cylinder and Deadbolt

Grade 1 Commercial Mortise Lock with Advanced Security Features

The Sargent 8200 Series mortise lock delivers maximum security, performance, and durability for commercial applications with heavy duty double cylinder construction and deadbolt. This classroom security intruder function model features 2 3/4" backset depth, 1 3/4" door thickness compatibility, and operates from 12 to 24VDC with EcoFlex technology. Certified to ANSI/BHMA A156.13 Series 1000 Operational Grade 1 standards 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

  • Heavy-Duty Durability: UL Cycle Above and Beyond test completed at 16 million cycles (Verification ID: V584148) for exceptional longevity in high-traffic commercial environments.
  • Advanced Security Construction: Heavy duty double cylinder with deadbolt and patented design provides maximum resistance against unauthorized entry and vandalism.
  • Flexible Power Options: Electromechanical version operates from 12 to 24VDC with EcoFlex technology reducing power consumption up to 96% for energy-efficient operation.
  • Professional Grade Certification: ANSI/BHMA A156.13 Series 1000 Operational Grade 1 rating with UL 10C fire rating up to 3 hours for code compliance and safety.
  • Universal Key System Compatibility: Integrates with all SARGENT key systems (Degree, Signature, KESO, and XC) for flexible master keying and security management.
  • Field-Reversible Installation: Field reversible handing with 2 3/4" standard backset and multifunctional lockbody allows easy on-site function changes and reduces inventory requirements.
  • Manufacturer Warranty: 10-year limited warranty with 2-year coverage on electrical components for long-term protection and confidence.
  • Multiple Function Options: Available in 56 different functions including electromechanical, security and monitoring configurations for diverse application requirements.

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 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

  • Educational Facility Classroom Security
  • Commercial Office Building Access Control
  • Healthcare Institution Security Systems
  • Government and Municipal Building Protection
  • Multi-Tenant Residential Properties
  • Industrial Facility Access Points
  • Emergency Lockdown Systems

Why Choose Sargent Quality?

Sargent 8200 Series 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 comprehensive protection for demanding commercial applications. Engineered with multiple certifications including ANSI/BHMA Grade 1, UL 10C fire rating, and ADA compliance, this lock represents the industry benchmark for mortise lock security and performance where dependable operation is essential.

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:
Classroom Security Intruder
Product Type:
Mortise Locks
Duty Level:
Heavy Duty
Handle Type:
Lever
Product Attribute:
Mortise Locks
Electronic:
No
Product Function:
Classroom Security
Product Category:
Mechanical Locks
Collection:
8200 Series
Department:
Door Hardware

Sargent 8239 EA 26D – Frequently Asked Questions

1) How does the Sargent 8239 classroom security intruder function actually work during a lockdown?
The 8239 is a double cylinder lock with a deadbolt, so a teacher locks the door from inside the classroom with a key instead of stepping into the corridor. The deadbolt throws from either side by key, and the lever trim handles normal traffic the rest of the day. That is the point of the intruder function: lockdown happens from inside the room. Because it is keyed on both sides, check your local egress code for the opening before specifying it.
2) Will the Sargent 8239 mortise lock fit a standard 1-3/4 inch commercial door?
Yes. The 8239 is built for 1-3/4 inch door thickness with a 2-3/4 inch backset, which is the standard mortise prep on commercial openings. If your doors were prepped for a 2-3/4 inch backset mortise pocket, this drops into the same prep.
3) Do I need to order the Sargent 8239 handed, or can it be reversed on site?
Handing is not something you have to lock in at order time. The 8239 lockbody is field reversible, so a locksmith can change hand on the job. That also means you can stock one lock and cover both left and right openings across a building.
4) Can I get the Sargent 8239 to work on our existing master key system?
It works with all SARGENT key systems, including Degree, Signature, KESO and XC, so it folds into an existing SARGENT masterkey hierarchy. On the order you pick the cylinder route: standard cylinder, less cylinder if you are supplying your own, 70 for small format interchangeable core prep less core, or 60 for large format IC prep less core. Keying is specified as keyed different, keyed alike, or to a key code you enter. If you choose less cylinder, select None for keying.
5) Is the Sargent 8239 approved for a fire rated classroom door?
It carries a UL 10C fire rating up to 3 hours and is certified to ANSI/BHMA A156.13 Series 1000 Operational Grade 1. That covers 3 hour rated openings in schools, healthcare and government buildings. The description also states ADA compliance, and the lever trim is the operable style ADA requires.
6) What do I have to specify when ordering a Sargent 8200 Series mortise lock besides the function?
Four things beyond the 8239 function. Lever design: 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. Finish, from 16 choices spanning brass, bronze, nickel, chrome, stainless and black or white suede powder coat. Then the cylinder and keying selection. Match the lever and rose to what is already hanging on your other doors if you are adding to an existing building.
7) Is the Sargent 8239 an electrified lock that needs power run to the door?
No. The 8239 as configured here is a mechanical lock, no wiring, no power supply, no transfer hinge. The 8200 Series does include electromechanical models that run on 12 to 24VDC, but that is a different configuration. If you want an access control tie-in on a mortise opening, look at the BEST 45HW wired electromechanical mortise lock with 12V/24V operation or the Command Access ML190 motorized mortise lock with 24VDC and field selectable fail safe or fail secure.
8) What other classroom security mortise locks could I use instead of the Sargent 8239?
Several, depending on how you want the lockdown to work. The Marks USA LA318GJ is a Grade 1 classroom security indicator mortise lockset for 1-3/4 inch doors, with an ANSI strike and steel escutcheon measuring 8-1/2 x 2-3/4 x 7/16 inches, and it shows status visually rather than relying on a double cylinder. The BEST 45HCA heavy duty mortise lockbody with intruder function is the lockbody-only route if you already have trim. On the electronic side, the TownSteel FME-4000 is a Grade 1 electronic intruder classroom mortise lockset with RFID for 1-3/4 inch doors. For a conventional classroom function without the intruder feature, the Corbin Russwin ML2003 and the Cal-Royal NM8070 are both Grade 1 for 1-3/4 inch doors.
9) Is there a BEST intruder function mortise lock equivalent to the Sargent 8239?
Yes. The BEST 45HCAINL is a heavy duty mortise lockbody with intruder function, the same lockdown concept as the Sargent 8239 classroom security intruder function. The difference is scope of supply: the BEST 45HCAINL is a lockbody, while the Sargent 8239 is ordered as a complete lockset with lever, rose and finish selections, in a double cylinder keyed configuration with deadbolt.
10) If I do not need the intruder lockdown feature, what simpler classroom mortise lock can I use instead of the Sargent 8239?
A standard classroom function mortise lock is the simpler route. The Corbin Russwin ML2003 is a Grade 1 mortise classroom lockset for 1-3/4 inch doors, and the Cal-Royal NM8070 is a heavy duty Grade 1 classroom mortise lockset with auxiliary deadlatch, also for 1-3/4 inch doors. Both are keyed classroom function only; the Sargent 8239 adds the classroom security intruder function with a heavy duty double cylinder and deadbolt so the door can be secured from inside the room.
11) We want keypad or credential lockdown on classroom doors instead of a keyed lock. What replaces the Sargent 8239?
The TownSteel FME-4000 is an electronic intruder classroom mortise lockset with RFID technology, Grade 1 heavy duty for 1-3/4 inch doors, and is the closest credential-based counterpart to the Sargent 8239 intruder function. The TownSteel FME-2000 is the Grade 1 classroom RFID version without the intruder designation. Alarm Lock also offers the DL3500CR Trilogy Grade 1 electronic mortise lock with classroom function and 300 user codes for doors 1-5/8 to 1-7/8 inches thick. The Sargent 8239 itself is a non-electronic keyed lock.
12) What mortise locks look like substitutes for the Sargent 8239 but will not give classroom lockdown?
Several Grade 1 mortise locks share the same body format but not the function. The Accentra 8805FL and Cal-Royal NM8080 are storeroom function, always locked outside with no inside lockdown control. The Cal-Royal NM8440 is privacy with a deadbolt for bed and bath openings. The Falcon MA101, Schlage PM010 and TownSteel MRX-L-01 are passage function with no keying at all. None of these provide the classroom security intruder function with double cylinder and deadbolt that the Sargent 8239 is built for.
13) How durable is the Sargent 8200 mortise lock for a high traffic school corridor?
Heavy duty, and tested well past the Grade 1 minimum. Sargent completed a UL Cycle Above and Beyond test at 16 million cycles on the 8200 Series (Verification ID V584148). For a classroom door that gets hit every period, that is the number that matters more than the grade alone.
14) Is there an installation template for prepping doors for the Sargent 8200 mortise lock?
Yes. Sargent publishes a 7800 and 8200 Series mortise lock template covering all sectional rose trims and escutcheon trims, and a full 7800/8200 mortise lock catalog with the function list. Both are linked in the product documents. Since the 8239 uses rose trim, the sectional rose section of that template is the one you want for the door prep.
15) Can I standardize on one Sargent mortise lockbody across a whole building and change functions later?
That is how the 8200 Series is set up. The lockbody is multifunctional and field reversible, so functions can be changed on site and you are not stocking a separate lock for every opening and every hand. The series covers 56 functions in total, including mechanical, electromechanical and monitoring configurations, with the 8239 being the classroom security intruder version.
16) Our classroom doors are 1-5/8 inch. Is the Sargent 8239 the right lock or should I look at something else?
The Sargent 8239 is specified for 1-3/4 inch door thickness. For doors in the 1-5/8 to 1-7/8 inch range, the Alarm Lock Trilogy line covers it: the DL2700CR is a Grade 1 classroom function electronic mortise lock with weatherproof design, and the DL3500CR is the Grade 1 classroom version with 300 user codes. Both are keypad locks rather than keyed double cylinder locksets.
17) Can I use a Schlage L9092EU or a Command Access ML190 in place of the Sargent 8239 on an access-controlled classroom door?
Only if the door is on an access control system rather than relying on a key-operated intruder function. The Schlage 03A electric lock/unlock outside lever mortise lock is heavy duty, corridor function, keyed outside with request to exit and 12/24VDC operation for 1-3/4 inch doors. The Command Access ML190 is a heavy-duty motorized mortise lock in storeroom function with field selectable EL/EU operation on 24VDC. Both are electrically controlled from the access system; the Sargent 8239 is a mechanical classroom security intruder lock with double cylinder and deadbolt that is secured with a key at the door.
18) For behavioral health or detention rooms, is the Sargent 8239 the right choice or is there a better mortise lock?
For anti-ligature openings, look at the TownSteel MRX-A-01 with satin stainless ligature resistant arch trim or the MRX-L-01 anti-ligature lever mortise lockset, both Grade 1 heavy duty passage function for 1-3/4 inch doors, or the Marks USA 5PDN Grade 1 hospital passage mortise push/pull paddleset in satin stainless steel, which is ligature resistant and ADA compliant. The Sargent 8239 uses conventional lever trim with a choice of A, B, E, F, J, L, P or W levers and is built for classroom security intruder lockdown rather than ligature resistance.
19) What is the difference between the Sargent 8239 and the BEST 45HCAC public entrance mortise lock?
Function. The BEST 45HCAC is a heavy duty mortise lock body in public entrance function with field reversible operation, intended for doors that are left in a latched or unlatched state for general traffic. The Sargent 8239 is a heavy duty classroom security intruder function lockset with double cylinder and deadbolt, keyed for lockdown control. Both are heavy duty and field reversible.
20) I need a Grade 1 mortise lock that matches Schlage or Corbin trim on the rest of the building. What are the options alongside the Sargent 8239?
The Corbin Russwin ML2003 is a Grade 1 mortise classroom lockset for 1-3/4 inch doors in the ML2000 Series, and Schlage offers Grade 1 heavy duty mortise trim in the L Series, including the L0170 half dummy for 1-3/4 inch doors. The Sargent 8239 is a Grade 1 classroom security intruder lockset that can be ordered in 16 finishes from bright brass through satin stainless steel and black or white suede powder coat, with E, L, LN or O rose to match adjacent hardware.
How fast can I get the Sargent 8239 EA 26D delivered?
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Can I return it if it doesn’t work for me?
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Does the Sargent 8239 EA 26D come with a warranty?
Absolutely. The Sargent 8239 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 8239 EA 26D?
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