Sargent 8238-ET Classroom Secu...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,961.85
$1,482.74
Sargent Sargent 8200 Series - (8238) Classroom Security Intruder Function Escutcheon Trim, Heavy Duty Double Cylinder Mortise Lock, Grade 1 SGT-8238-ET

Sargent 8238-ET Classroom Security Intruder Function Heavy Duty Double Cylinder Mortise Lock with Escutcheon Trim

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Model: 8238 LE1A 10
From the 8200 Series Collection
$1,961.85
$1,482.74
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,961.85
$1,482.74
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Sargent 8238-ET Grade 1 Classroom Security Mortise Lock with Double Cylinder and Escutcheon Trim

Professional Grade 1 Mortise Lock for Enhanced Classroom Security

The Sargent 8238-ET delivers maximum security, performance, and durability with heavy-duty components designed for commercial applications. This Grade 1 classroom security intruder function lock features a 2 3/4" backset, 1 3/4" door thickness compatibility, and 3/4" latchbolt throw for reliable operation. 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 for operational excellence.

Professional Features & Benefits

  • Heavy-Duty Durability: Exceeds independently verified testing with completion of UL Cycle Above and Beyond test at 16 million cycles for exceptional durability in high-traffic applications.
  • Grade 1 Performance: ANSI/BHMA A156.13 Series 1000 operational grade certification ensures reliable performance in demanding commercial environments.
  • Precise Door Compatibility: Standard 2 3/4" backset depth and 1 3/4" door thickness with 3/4" latchbolt throw for secure engagement.
  • Universal Key System Integration: Compatible with all SARGENT key systems including Degree, Signature, KESO, and XC for flexible master keying options.
  • Field Reversible Handing: Adaptable installation reduces inventory requirements and simplifies on-site configuration changes.
  • Comprehensive Fire Rating: UL 10C positive pressure certified and UL-cUL Fire-Rated up to 3 hours for life safety compliance.
  • EcoFlex Technology: Electromechanical versions operate from 12 to 24VDC with up to 89% energy savings through advanced power management.
  • 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 door thickness of 1 3/4", backset depth of 2 3/4", and handing as applicable to this mortise lock.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces for proper mortise preparation.
  3. Prepare door and frame by drilling required holes and routing mortise cavity as specified in manufacturer instructions for the lock body and strike.
  4. Install all mounting hardware including lock body, cylinder, and escutcheon trim, securing 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, ensuring 3/4" latchbolt engagement.
  6. Test device operation to verify proper function including key operation, lever action, and security features, making final adjustments as needed. Refer to manufacturer documentation for complete installation details and troubleshooting.

Professional Applications

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

Why Choose Sargent Quality?

Sargent mortise locks deliver professional-grade reliability with heavy-duty construction tested to 16 million cycles and comprehensive certifications including UL 10C fire rating up to 3 hours. The 10-year limited warranty with 2-year electrical component coverage demonstrates the manufacturer’s confidence in long-term performance. Engineered for demanding commercial applications where dependable security and operational excellence are 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 8238 LE1A 10 – Frequently Asked Questions

1) What does the Sargent 8238 classroom security function actually do at the door?
The 8238 is a double cylinder classroom security intruder lock: there's a keyed cylinder on both sides, so a teacher can lock the outside lever from inside the room with a key without stepping into the corridor. That's the whole point of the intruder function on a classroom opening. The inside lever always retracts the latch for free egress. If you want a lock where the room can only be secured from the hallway side, this is not it, order a standard classroom function instead.
2) Will the Sargent 8238 latch into the strike that's already in my frame?
The 8238 throws a 3/4 inch latchbolt on a 2-3/4 inch backset, which is the standard mortise lock geometry, so it will engage a standard ANSI mortise strike lip already in the frame. What decides it is the mortise pocket in the door, not the strike: if the existing lock is a 2-3/4 inch backset mortise body the pocket carries over. A cylindrical lockset with a bored hole does not, that door needs to be mortised.
3) Is the Sargent 8238 mortise lock fire rated for a labeled classroom door?
Yes. The 8238 is UL 10C positive pressure certified and UL-cUL fire rated up to 3 hours, so it can go on a labeled opening within that rating. It also carries ANSI/BHMA A156.13 Series 1000 Grade 1 operational certification, which is the level most school and institutional specs call for.
4) Can I get the Sargent 8238 without cylinders so I can use my own cores?
Yes, and there are three ways to do it. Order it Less Cylinder if you're supplying your own, or order the 70 prep for a small format interchangeable core or the 60 prep for a large format interchangeable core, both shipped less core so you install your own. If you go less cylinder, set keying to None on the order. Otherwise pick a standard cylinder with keyed different, keyed alike, or supply a key code.
5) Will the Sargent 8238 key into the master key system already in my building?
The 8238 lock body works with all SARGENT key systems, including Degree, Signature, KESO, and XC, so if the building is already on a Sargent system it masters into it. For a phased retrofit, order keyed alike or supply your existing key code on the order so the new classrooms match the sets already in the field.
6) How does the Sargent 8238 compare to other Grade 1 classroom mortise locks for a school retrofit?
Among Grade 1 classroom mortise locks, the mechanical alternatives are the Corbin Russwin ML2003 and the Cal-Royal NM8070, both Grade 1 classroom function on 1-3/4 inch doors. The difference from the 8238 is the function itself: those are standard classroom locks, while the 8238 is the double cylinder intruder version that lets a teacher secure the door from inside. BEST also lists a 45HCA heavy duty mortise lockbody with intruder function if you're standardizing on BEST cores. For credential-based intruder classroom security, TownSteel's FME-4000 Series is an electronic intruder classroom mortise lock with RFID.
7) Can I replace a cylindrical classroom lever lock with the Sargent 8238?
Not without re-prepping the door. The 8238 is a mortise lock, which needs a rectangular pocket routed into the door edge plus a 2-3/4 inch backset cross bore for the cylinders and lever spindle. A cylindrical lockset only has a round bore. On a hollow metal or wood door that means new prep or a mortise conversion kit. If the doors are bored and you want to keep them that way, a cylindrical Grade 1 lock is the right call instead.
8) What is the closest classroom security intruder mortise lock to the Sargent 8238-ET from another manufacturer?
The BEST 45HCAINL is the nearest mechanical match. It is a heavy duty mortise lockbody with an intruder function, the same lock-from-inside-the-room behavior the Sargent 8238-ET provides with its classroom security intruder function. The difference is scope: the Sargent 8238-ET is a complete double cylinder lock with escutcheon trim, offered with A, B, E, F, J, L, P and W levers and LE1, LS, LW1 and WT escutcheons, while the BEST 45HCAINL is a lockbody, so trim is ordered separately. The Marks USA LA318GJ is the other close peer, a Grade 1 classroom security indicator mortise lockset for 1-3/4 inch doors that adds a visual status indicator.
9) If a classroom does not need the intruder function, what standard classroom mortise lock can be used instead?
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 an auxiliary deadlatch. Both provide conventional classroom function, keyed from the corridor side only. The Sargent 8238-ET differs in that it is double cylinder and carries the classroom security intruder function, so the room side can be keyed to lock down the door from inside.
10) What electronic alternative gives classroom lockdown without keys?
The TownSteel FME-4000 Series is an electronic intruder classroom mortise lockset with RFID technology, Grade 1 heavy duty for 1-3/4 inch doors, and is the direct credential-based counterpart to the mechanical intruder function. The TownSteel FME-2000 Series covers standard classroom function with RFID on the same 1-3/4 inch Grade 1 heavy duty platform. Alarm Lock offers keypad routes with the DL3500CR, a Grade 1 classroom electronic mortise lock for 1-5/8 to 1-7/8 inch doors, and the DL2700CR with a weatherproof design in the same thickness range. The Sargent 8238-ET is a mechanical lock with no electronics, so it needs no power, batteries, or credential management.
11) What mortise locks look like a substitute for the 8238-ET but will not give classroom lockdown?
Several mortise locks share the body prep but not the function. The Falcon MA101 is a Grade 1 heavy duty mortise passage lock, the Schlage PM010 is a Grade 1 non-keyed passage latch mortise lock for 1-3/4 inch doors, and the Hager 3810E is a passage mortise lock with escutcheon and 2-3/4 inch backset for 1-3/4 to 2-1/2 inch doors. All three are unkeyed and always free, so no lockdown is possible. The Schlage L0170 is half dummy trim with no latch at all, and the Emtek 3102 Memphis and 3104 Hamilton are dummy mortise entrance locksets. The Sargent 8238-ET is keyed with double cylinder classroom security intruder function.
12) My door is 1-5/8 inch thick. Will the Sargent 8238-ET work, and what else fits?
The Sargent 8238-ET is specified for 1-3/4 inch door thickness with a 2-3/4 inch backset. For a 1-5/8 inch door, the Alarm Lock DL3500CR and DL2700CR are Grade 1 classroom electronic mortise locks rated for 1-5/8 inch to 1-7/8 inch doors, and the DL4500 Series electronic mortise deadbolt covers the same range. The Baldwin 6310 entrance/storeroom mortise lock body is rated for doors 1-3/8 inch and over.
13) Do I have to specify handing when ordering the Sargent 8238?
No. The 8238 lock body is field reversible, so one part number covers left and right hand openings and the handing is set during installation. For a district or a facility standardizing across many classrooms, that means one stocked lock instead of two.
14) What escutcheon and lever do I have to pick for a Sargent 8238-ET, and what are the choices?
Both are required selections. Escutcheon trim comes in LE1, LS, LW1, and WT. Levers come in eight designs: A, B, E, F, J, L, P, and W. Match the lever design to whatever is already on adjacent openings if you're adding to an existing building, since the lever profile is the visible difference between one Sargent opening and the next.
15) What finishes does the Sargent 8238 mortise lock come in for matching existing hardware?
Sixteen finishes, covering the full commercial range: 03 bright brass, 04 satin brass, 09 bright bronze, 10 satin bronze, 10B oil rubbed dark oxidized satin 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. Most school and commercial corridors run 26D or 32D, so those are the two to check your existing openings against first.
16) Is the Sargent 8238 an electronic lock, or does it need power?
It's fully mechanical, no power, no wiring. Key and lever only. Sargent does build electromechanical versions of the 8200 line that run 12 to 24VDC on EcoFlex, but that is a different order. If you need an access-controlled classroom opening instead, look at an electrified mortise lock such as the BEST 45HW wired mortise, which operates on 12V/24V.
17) Is the Sargent 8238 durable enough for a high traffic school corridor?
It's built for that traffic. The 8238 completed UL's Cycle Above and Beyond test at 16 million cycles, and it's a heavy duty Grade 1 commercial lock under ANSI/BHMA A156.13 Series 1000. Grade 1 is the top operational grade in that standard and is what institutional specs normally require for classroom and corridor openings.
18) Does the Sargent 8238-ET include the trim, or do I order that separately?
The ET version comes with escutcheon trim, so you pick the escutcheon (LE1, LS, LW1, or WT) and lever design as part of the order and it ships as a complete lockset. What you decide separately is the cylinder: standard cylinder, less cylinder, or an interchangeable core prep at 60 or 70 with the core supplied by you.
19) Can I use a storeroom mortise lock in place of the Sargent 8238-ET on a classroom door?
Only where the opening does not need room-side locking. The Accentra 8805FL is a Grade 1 storeroom mortise lock with an Arcadia lever from the 8800 Series, the Cal-Royal NM8080 is a heavy duty Grade 1 storeroom mortise lockset with an interchangeable core option for 1-3/4 inch doors, and the Baldwin 6310 is an entrance/storeroom mortise lock body for doors 1-3/8 inch and over. Storeroom function keeps the outside lever locked at all times and is keyed from the outside; the Sargent 8238-ET carries the classroom security intruder function and is double cylinder, which is what lets the door be secured from inside the room.
20) What should I use for an office or general entrance opening instead of a classroom security lock?
The Cal-Royal NM8050 is a heavy duty Grade 1 office/entrance mortise lockset with an auxiliary deadlatch for 1-3/4 inch doors, and the Hager 3850E is a Grade 1 office mortise lock with lever and escutcheon on a 2-3/4 inch backset for 1-3/4 to 2-1/2 inch doors. For apartment-style entrance function, the Baldwin 6301LS is a lever by lever entrance/apartment mortise lock body on a 2-1/2 inch backset. The Sargent 8238-ET is built specifically for classroom security intruder function and uses a 2-3/4 inch backset.
21) If the classroom door needs to be released or locked from a central access control panel, what replaces the 8238-ET?
An electrified mortise lock is the route. The Schlage L9092EU 03A is a heavy duty electric lock/unlock outside lever mortise lock for 1-3/4 inch doors, keyed outside, with request to exit and 12/24VDC operation. The Command Access ML190 Series is a heavy duty motorized mortise lock with field selectable fail safe or fail secure operation on 24VDC in storeroom function, and the BEST 45HW Series is a heavy duty wired electromechanical mortise lock with 12V/24V operation. The Sargent 8238-ET is a mechanical lock and operates entirely by key and lever.
22) For a behavioral health or ligature resistant opening, what mortise lock should be specified instead?
The TownSteel MRX-L-01 is a Grade 1 heavy duty stainless steel anti-ligature lever mortise lockset in passage function for 1-3/4 inch doors, and the MRX-A-01 is the same passage function with 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. All three are passage function, so they do not lock; the Sargent 8238-ET is a keyed double cylinder lock with lever trim.
23) What mortise lock covers a heavily used corridor or public entrance rather than a classroom?
The BEST 45H Series heavy duty mortise lock body in public entrance function with field reversible operation suits corridor and lobby traffic. Public entrance function allows the outside lever to be locked or unlocked by key without the room-side control that the classroom security intruder function on the Sargent 8238-ET provides. The 8238-ET is also field reversible for handing and is rated heavy duty Grade 1.
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Does the Sargent 8238 LE1A 10 come with a warranty?
Absolutely. The Sargent 8238 LE1A 10 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
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