Sargent 11G16 T-Zone Grade 1 D...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,213.00
$756.22
SGT-11G16

Sargent 11G16 T-Zone Grade 1 Double Cylinder Classroom Security Lock

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Model: 28-11G16 LB 26D
From the 11 Line Series Collection
$1,213.00
$756.22
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,213.00
$756.22
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Sargent T-Zone 11G16 Grade 1 Double Cylinder Classroom Security Lock with 7.6 Million Cycle Rating

Professional Classroom Security Solution with Modular Design

The Sargent T-Zone 11G16 Grade 1 Double Cylinder Classroom Security Lock delivers professional-grade security for educational facilities with modular design flexibility and ultra-high durability. This Grade 1 cylindrical lock accommodates door thickness from 1-3/4" to 2-1/2" with standard 2-3/4" backset and 1/2" latchbolt throw. Independently verified at 7.6 million cycles (UL Verification ID: V584148), this lock integrates with existing key systems including SARGENT Degree and Signature, SFIC, Schlage, and Medeco LFIC cylinders for maximum compatibility.

Professional Features & Benefits

  • Ultra-High Cycle Rating: Independently verified at 7.6 million cycles (UL Verification ID: V584148) for exceptional durability in high-traffic educational environments and long-term reliability.
  • Door Compatibility: Accommodates door thickness from 1-3/4" to 2-1/2" with standard 2-3/4" backset and 1/2" latchbolt throw for versatile installation requirements.
  • Modular Field-Changeable Design: Easy function changes in the field without lock replacement, reducing maintenance costs and facility downtime for operational flexibility.
  • Universal Key System Integration: Accepts SARGENT Degree and Signature key systems plus SFIC, Schlage, and Medeco LFIC cylinders for maximum keying flexibility and existing system compatibility.
  • T-Zone Torque-Resistant Construction: Prevents lock twisting and eliminates through bolts or surface screws for superior installation integrity and enhanced security performance.
  • Standard Door Preparation: Fits standard 161 door prep with non-handed design for simplified installation and reduced inventory management requirements.
  • Comprehensive Certifications: ANSI/BHMA A156.2 Series 4000 Grade 1, UL-cUL fire-rated up to 3 hours, ADA compliant, and Florida Building Code approved for code compliance.
  • Manufacturer Warranty: 10-year limited warranty for long-term protection and confidence in demanding commercial applications.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Installation & Operation

  1. Review manufacturer specifications and verify door preparation requirements including door thickness from 1-3/4" to 2-1/2", standard 161 prep, and 2-3/4" backset compatibility.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces for proper cylindrical lock alignment.
  3. Prepare door and frame by drilling required holes and routing as specified in manufacturer instructions for T-Zone cylindrical lock installation.
  4. Install all mounting hardware and secure the lock to door and frame per manufacturer torque specifications, ensuring T-Zone construction integrity without through bolts.
  5. Install appropriate cylinder type (SARGENT Degree/Signature, SFIC, Schlage, or Medeco LFIC) and adjust operational components for proper alignment and smooth operation.
  6. Test lock operation to verify proper function, 1/2" latchbolt throw, and classroom security features. Refer to manufacturer documentation for complete installation details and function-specific adjustments.

Professional Applications

  • Educational Facility Classroom Security
  • School Administrative Offices
  • Healthcare Institution Patient Areas
  • Commercial Office Building Security
  • Government Facility Access Control
  • Multi-Tenant Residential Properties
  • Institutional Building Security Systems

Microshield Anti-Microbial Option

Optional Microshield coating available to supplement cleaning protocols for healthier educational and healthcare environments. This anti-microbial treatment provides additional protection against surface contamination while maintaining the lock's professional appearance and operation.

Why Choose Sargent Quality?

Sargent T-Zone 11 Line Series locks deliver professional-grade reliability with torque-resistant construction independently verified at 7.6 million cycles for lifetime facility performance. The 10-year limited warranty and modular field-changeable design reduce total cost of ownership while meeting comprehensive certifications including Grade 1, UL fire rating up to 3 hours, and ADA compliance. Engineered for demanding commercial applications where dependable classroom security and long-term durability are essential.

Product Specs

Series:
11 Line Series
Grade:
Grade 1
Keyed Function:
Double Cylinder
Product Group:
Mechanical Locks
Product Subgroup:
Bored Locksets
Product Type:
Leversets
Subcategory:
Bored Locksets
Keyed:
Yes
Commercial/Residential:
Commercial
Lock Type:
Cylindrical
Lock Function:
Classroom Security
Duty Level:
Heavy Duty
Handle Type:
Lever
Product Attribute:
Cylindrical Locks
Product Function:
Classroom Security
Door Hand Direction:
Non-Handed
Product Category:
Mechanical Locks
Collection:
11 Line Series
Department:
Door Hardware

Sargent 28-11G16 LB 26D – Frequently Asked Questions

1) Can I key the Sargent 11G16 into my existing school master key system?
In most cases yes. The 11G16 takes SARGENT Degree and Signature key systems and also accepts SFIC, Schlage, and Medeco LFIC cylinders. On the order you pick the cylinder type: 6 pin standard, 60 for Sargent large format interchangeable core, 70 for Sargent small format interchangeable core, or 30 for Schlage key-in-lever prep supplied less core, which is how you drop your own Schlage cores in. Keying is specified separately as keyed different, keyed alike, or master keyed, and there are 41 keyways to choose from with LA as the standard.
2) Is the Sargent 11G16 rated for a fire door?
Fire rated, UL-cUL listed up to 3 hours. It also carries ANSI/BHMA A156.2 Series 4000 Grade 1, is ADA compliant, and is Florida Building Code approved. For a corridor or stair door in a school or hospital where the opening has to hold a 3 hour label, that is the rating set a spec writer is looking for.
3) What is the difference between the Sargent 11G16 and the Dexter C1000 classroom security lever?
Both are Grade 1 cylindrical classroom security locks, and the difference that usually decides it is door thickness. The Dexter C1000 classroom security lever covers 1-3/8 to 1-3/4 inches; the Sargent 11G16 covers 1-3/4 to 2-1/2 inches. So a thin 1-3/8 inch interior door points to the Dexter, and a thick institutional door over 1-3/4 inches points to the Sargent. The 11G16 also accepts SFIC, Schlage, and Medeco LFIC cylinders, which matters if you are matching an existing key system.
4) What is the difference between a classroom security lock and a plain classroom lock?
A classroom security lock such as the Sargent 11G16 is keyed on both sides, so the outside lever can be locked from inside the room. A plain classroom function lock, such as the Dexter C1000 Series Grade 1 classroom cylindrical lever lock, is keyed outside only, so the outside lever is locked and unlocked from the corridor. Both are Grade 1 cylindrical lever locks. If a lockdown procedure requires staff to secure the door without opening it, the double cylinder classroom security arrangement of the 11G16 is what that procedure describes.
5) What is the closest cross-brand equivalent to the Sargent 11G16 classroom security lever lock?
The Dexter C1000 Series classroom security cylindrical lever lock is the nearest match in the comparable set. Both are Grade 1 cylindrical lever locks built for the classroom security function, where a key on either side controls the outside lever so a teacher can lock down from inside the room without stepping into the corridor. The Sargent 11G16 is a double cylinder classroom security lock in the 11 Line Series; the Dexter C1000 classroom security lock is a clutching, keyed design. Door thickness is where they part company: the Dexter C1000 classroom security lock covers 1-3/8 inch to 1-3/4 inch doors, while the 11G16 handles 1-3/4 inch through 2-1/2 inch, so a thick fire door or an added-thickness leaf points to the Sargent.
6) What lock is used on a door that must have no free egress, and how does it differ from a classroom security lock?
That is the asylum or institution function, where both levers stay locked and a key is required from either side to operate the door. The Dexter C1000 Series asylum lock (F87) is a Grade 1 cylindrical lock for 1-3/8 inch to 2 inch doors, and the Arrow MK33-BD-CS is a Grade 2 heavy duty asylum lock with a ball knob and a conventional cylinder in the Schlage C keyway. The Sargent 11G16 is also keyed on both sides, but as a classroom security lock the inside lever always retracts the latch for egress, which is the behavior a code-compliant classroom needs.
7) Do I need to specify a hand when ordering the Sargent 11G16 lever lock?
No handing to specify. The 11G16 is non-handed, so one lock covers left and right hand openings. For a school or a REIT standardizing across a building that cuts what you have to stock, and there is no risk of the wrong-hand lock showing up on site. You do still choose the lever style: B, J, L, or P.
8) How durable is the Sargent 11G16 for a high traffic school corridor?
Independently verified at 7.6 million cycles under UL Verification ID V584148, and rated Heavy Duty. For context, ANSI/BHMA Grade 1 cylindrical requires 800,000 cycles, so this is many multiples of the minimum. On a main classroom or cafeteria door taking thousands of operations a week, cycle count is the spec that actually predicts service life, more than the grade alone.
9) If I need to change a Sargent 11 Line lock from classroom security to another function later, do I have to replace the whole lock?
No. The 11 Line is modular and field changeable, so a function change is made in the lock rather than by buying a new one. That matters for a facility that reassigns rooms, an office becomes a classroom, a storeroom becomes an office, and the maintenance crew handles it without pulling the lock off the door and reordering.
10) Do I need through bolts or surface screws to mount the Sargent 11G16?
Neither. T-Zone construction resists torque without through bolts or surface screws, so nothing shows on the face of the door and there are no exposed fasteners for someone to attack. Installation is the standard 161 prep with the manufacturer's template, then the cylinder type you ordered goes in last.
11) Which lock should be used on an office or staff door instead of a classroom security lock?
An office door is normally an entry/office function rather than classroom security. In Grade 1 cylindrical, the Dexter C1000 Series entry/office lever lock covers that opening, with a clutching keyed design for doors 1-3/8 inch to 1-3/4 inch thick. In Grade 2, the Falcon B511CP6D is a medium duty entry/office cylindrical lever lock, and the Cal-Royal AUS00 is a Grade 3 entrance/office lever with a solid brass forged body for 1-3/8 inch to 1-3/4 inch doors. The Sargent 11G16 is the classroom security function and is keyed on both sides, which is more lock than a private office usually calls for.
12) What is a lower cost alternative for a storeroom or supply closet in the same building?
Storeroom function locks keep the outside lever locked at all times and are the usual choice for supply and custodial rooms. The Cal-Royal AG05 is a Grade 2 storeroom lever lockset with a deadlocking latchbolt for doors 1-3/8 inch to 1-3/4 inch thick, and the Hager 2580 is a Grade 2 storeroom cylindrical lock with the Withnell lever for doors 1-3/8 inch to 2 inch. Both are single-cylinder storeroom function, unlike the Sargent 11G16, which is a Grade 1 double cylinder classroom security lock.
13) What Grade 1 lever lock should go on the non-locking doors when standardizing a school on the Sargent 11G16?
Corridor, hall, and closet doors that never lock take a passage function, and staying at Grade 1 keeps the durability consistent. The Falcon K101 is a Grade 1 heavy duty passage cylindrical lock with non-handed levers, fire rated, for doors 1-3/8 inch to 2-1/4 inch. The Falcon T101 is a Grade 1 heavy duty passage lever with pressure release technology, and the Corbin Russwin CL3110 is a Grade 1 vandal resistant passage/closet lever, fire rated, for 1-3/4 inch to 2 inch doors. The Sargent 11G16 remains the keyed classroom security opening; it is also non-handed, which simplifies stocking across a mixed set of doors.
14) Can a keypad or electrified lever be used in place of a keyed classroom security lock?
They solve a different problem. The Corbin Russwin CL33903 is a Grade 1 electrified fail safe cylindrical lever operating on 12VAC/DC for doors 1-3/4 inch to 2 inch, so it unlocks on power loss and needs wiring and a transfer hinge or power transfer. The Delaney LP250 is a Grade 2 electronic keypad leverlock and the Lockey 1150 is a mechanical keypad lever set with a double combination for doors 1-1/8 inch to 2 inch. The Sargent 11G16 is a mechanical double cylinder lock that needs no power and no code management, and it accepts SARGENT Degree and Signature, SFIC, Schlage, and Medeco LFIC cylinders so it joins an existing key system.
15) Will a Schlage cylinder adapter let a classroom security lock join an existing Schlage key system?
On the Sargent 11G16 no adapter is needed. It can be ordered with a Schlage key-in-lever cylinder prep less core, and it also accepts SARGENT Degree and Signature, SFIC, and Medeco LFIC cylinders, so it drops into a facility already keyed on Schlage. Adapter kits such as the Accentra 107S Schlage cylinder adapter exist to bring Schlage cylinders into Yale hardware, which is a separate line of locks.
16) Is a Grade 2 or Grade 3 lever lock acceptable on a classroom door?
Grade level tracks the traffic the door sees. The Sargent 11G16 is Grade 1 heavy duty and independently verified at 7.6 million cycles, which is why it is specified for high-traffic educational openings. Grade 2 commercial levers in the same lever format include the Hager 2525 entry lock and the Falcon B511CP6D entry/office lock, and Grade 3 levers such as the Callan Artino entrance leverset and the Kwikset 200BRNL Breton passage sit below that. A classroom door on a school corridor cycles far more than a back-office door, and that is the distinction the grade is describing.
17) Does an exit device lever trim replace a cylindrical classroom lock?
No. The Corbin Russwin 585F715 is a Grade 1 lock lever for the ED8000 pushpad exit device and the CL3300 cylindrical lock series, sized for 1-3/4 inch to 2 inch doors, and the Imperial USA ED-EL500HD is a heavy duty escutcheon lever trim with an entry function for the ED-500 Series. Both are outside trim that mounts to an exit device already on the door. The Sargent 11G16 is a complete cylindrical lever lock that installs into a standard 161 door prep on its own.
18) What finishes and rose sizes does the Sargent 11G16 come in for matching existing hardware?
Fourteen finishes, covering the common commercial ones (26D satin chrome, 26 bright chrome, 15 satin nickel, 14 bright nickel, 10B oil rubbed bronze, 10BE, 10BL, 20D dark statuary bronze, 03 bright brass, 04 satin brass, 09 bright bronze, 10 satin bronze) plus BSP black and WSP white suede powder coat. Roses come in B at 2-3/4 inches, O at 2-3/4 inches, L at 3-1/8 inches, and E at 3-1/2 inches. If you are matching a corridor of existing Sargent trim, the rose diameter is what hides or exposes the old paint ring, so measure the current rose before picking.
19) Is the Sargent 11G16 suitable for a healthcare facility where surfaces get cleaned constantly?
It is used in patient areas and it can be ordered with an optional Microshield anti-microbial coating that supplements cleaning protocols on the touched surfaces. The lock is Grade 1 heavy duty commercial hardware, so it also stands up to the traffic on a patient room or treatment corridor door.
20) What matching dummy lever pairs with a Grade 1 cylindrical lever lock on an inactive leaf?
On the inactive leaf of a pair of doors, a dummy trim gives the same look with no latch. Grade 1 options include the BEST 9K Series 1DT single dummy trim cylindrical lever lock, heavy duty and non-keyed; the Accentra 455LN Augusta is a Grade 1 single dummy in the 5400 Series, and the BEST 7KC Series 1DT is a Grade 2 medium duty single dummy. The Sargent 11G16 is the keyed classroom security lock for the active leaf and is available with B, J, L, and P levers.
21) What should go on a restroom or single-occupancy door in a building using classroom security locks elsewhere?
Restroom and bed/bath doors take a privacy function, which locks from inside with an outside emergency release and no key. The Arrow MK02-TA is a Grade 1 privacy cylindrical lock with a Tudor knob, non-keyed and fire rated, for doors 1-3/4 inch to 2 inch. The Hager 2540 is a Grade 2 privacy cylindrical lock with a Withnell lever for 1-3/8 inch to 2 inch doors, and the Kwikset 300BRNL Breton is a Grade 3 privacy lever for 1-3/8 inch to 1-3/4 inch. The Sargent 11G16 is keyed on both sides and is not a privacy lock.
22) What is the difference between a residential-style entry lever and a commercial classroom security lock?
The Deltana 6201 Manchester, 6411 Morant, and 6431 Linstead are entry function levers for doors 1-3/8 inch to 2 inch thick, and the Baldwin Estate 5103 comes as passage, privacy, and handed half dummy versions with the 5048 rose. These are trim-led designs sold by function and appearance. The Sargent 11G16 is a commercial Grade 1 cylindrical lock, non-handed, ordered by backset, strike, cylinder type, keying, and keyway, so it can be built into a master key system and matched to the existing door and frame prep.
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Does the Sargent 28-11G16 LB 26D come with a warranty?
Absolutely. The Sargent 28-11G16 LB 26D is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
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