Sargent 8XG37 Grade 1 Classroo...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,015.00
$588.43
SGT-8XG37

Sargent 8XG37 Grade 1 Classroom Single Cylinder Knob Lock with 2-3/4" Backset

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Model: 28LC-8XG37 LB 10BE
$1,015.00
$588.43
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,015.00
$588.43
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Sargent 8X Line Grade 1 Classroom Single Cylinder Knob Lock with 2-3/4" Backset

Professional Grade 1 Classroom Security Solution

The Sargent 8X Line Grade 1 Classroom Single Cylinder Knob Lock delivers ANSI/BHMA Grade 1 performance with 2-3/4" standard backset and compatibility with door thicknesses from 1-3/8" to 1-3/4". This UL-cUL fire-rated knob lock features reversible, self-adjusting latches and accepts SARGENT standard, Signature and Degree® cylinders for flexible master key system integration. Built for both interior and exterior applications with robust construction designed and tested for demanding commercial environments.

Professional Features & Benefits

  • Door Compatibility: Accommodates door thicknesses from 1-3/8" to 1-3/4" with standard 2-3/4" backset for versatile installation options.
  • Grade 1 Durability: ANSI/BHMA A156.2 Series 4000 Grade 1 certification ensures heavy-duty performance for high-traffic commercial applications.
  • Fire Safety Compliance: UL-cUL fire-rated up to 3 hours provides critical life safety protection in commercial buildings.
  • Reversible Latch Design: Self-adjusting latches automatically conform to door bevel for simplified installation and reliable operation.
  • Cylinder Flexibility: Accepts SARGENT standard, Signature and Degree® cylinders for seamless integration with existing or new master key systems.
  • Interior/Exterior Versatility: Suitable for both interior and exterior applications with weather-resistant construction.
  • Complete Installation Package: Includes 2 keys with 1/2" latchbolt throw and T-Strike curved lip strike for immediate installation.
  • Manufacturer Warranty: 3-year limited warranty provides confidence and protection for commercial installations.

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 1-3/8" to 1-3/4", backset requirements from 2-3/8" to 2-3/4", and handing as applicable to this non-handed product.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces.
  3. Prepare door and frame by drilling required holes and routing as specified in manufacturer instructions.
  4. Install all mounting hardware and secure 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.
  6. Test device operation to verify proper function and make 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 8X Line Series knob locks deliver professional-grade reliability with ANSI/BHMA Grade 1 certification and UL-cUL fire rating up to 3 hours for demanding commercial applications. The 3-year limited warranty and robust construction ensure dependable performance in high-traffic environments. Engineered for versatile door requirements with flexible cylinder compatibility and reversible latch design for simplified installation and long-term reliability.

Product Specs

Series:
8X Line Series
Grade:
Grade 1
Keyed Function:
Single Cylinder
Subcategory:
Bored Locksets
Keyed:
Yes
Commercial/Residential:
Commercial
Handle Type:
Knob
Lock Function:
Classroom
Product Group:
Mechanical Locks
Product Subgroup:
Bored Locksets
Product Type:
Knobsets
Duty Level:
Heavy Duty
Product Attribute:
Cylindrical Locks
Product Function:
Classroom
Door Hand Direction:
Non-Handed
Product Category:
Mechanical Locks
Department:
Door Hardware

Sargent 28LC-8XG37 LB 10BE – Frequently Asked Questions

1) Will the Sargent 8XG37 fit a 1-3/8 inch door, or only a standard 1-3/4 inch commercial door?
Both. The 8X Line classroom knob lock covers door thicknesses from 1-3/8 to 1-3/4 inches, so it works on older 1-3/8 inch interior doors as well as standard 1-3/4 inch commercial doors.
2) Can I get the Sargent 8X classroom knob lock with a 2-3/8 inch backset instead of 2-3/4?
Yes. Backset is a required selection on the 8XG37 and both 2-3/4 inch and 2-3/8 inch are offered. Measure from the door edge to the center of the bore hole before you order; 2-3/4 is the usual commercial prep and 2-3/8 the common residential one.
3) Can I order the Sargent 8X classroom lock on my building's existing master key system?
Yes. Keying is a required selection with keyed different, keyed alike, master keying or standard keying, and there are 41 keyway choices with LA as the standard. The lock accepts SARGENT standard, Signature and Degree cylinders. If your site already runs a SARGENT system, specify the matching keyway and master key level on the order.
4) Is there a lower-cost classroom function knob lock instead of the Sargent 8XG37?
Yes. The Dexter C2000 Series classroom cylindrical ball knob lock is a Grade 2 keyed classroom function knob that fits doors 1-3/8 inch to 1-3/4 inch thick, the same door thickness range the Sargent 8XG37 covers. The Sargent 8XG37 is ANSI/BHMA Grade 1 heavy duty and accepts SARGENT standard, Signature and Degree cylinders for master key integration; the Dexter is a non-clutching Grade 2 unit. For a high-traffic school corridor spec written to Grade 1, the 8XG37 is the one that meets it; for a lighter-use classroom or storage door, the Dexter C2000 carries the same classroom function at Grade 2.
5) What other Grade 1 cylindrical knob locks are comparable to the Sargent 8XG37?
Two close Grade 1 cylindrical knob peers are the BEST 8K Series single cylinder heavy duty knob lock, which is an entrance function, and the Corbin Russwin CK4851 with the Global knob, a Grade 1 entrance/office lock with a conventional cylinder that fits doors 1-3/8 inch to 2 inch thick. Both are keyed heavy duty cylindrical knobs like the Sargent 8XG37, but they are entrance/office functions: the outside knob is locked and unlocked by key or by an inside button. The Sargent 8XG37 is a classroom function, where the outside knob is locked and unlocked only by key with no inside locking control. If the opening is specified classroom, the entrance units are not a swap.
6) What is the LC less cylinder option on the Sargent 8XG37 for?
LC ships the lock without a cylinder so a locksmith can install your own keyed core, which is how most schools and large facilities buy when they pin on site. Choose LC in bright brass, dark oxidized satin bronze or satin stainless. If you want it keyed from the factory, take the standard 6-pin cylinder version instead and set keying and keyway.
7) Do I need to specify handing for the Sargent 8X knob lock?
No. The 8XG37 is non-handed, and the latch is reversible and self-adjusting to the door bevel, so one lock covers left and right hand openings. That makes it easier to stock a single part across a building.
8) For a fire-rated opening, what are the alternatives to the Sargent 8XG37 knob lock?
The Sargent 8XG37 is UL-cUL fire rated up to 3 hours and is a Grade 1 keyed classroom lock. Among fire-rated knob peers, the Falcon X101 is a Grade 1 heavy duty cylindrical passage knobset and the Falcon W101 is a Grade 2 medium duty passage/closet knob lock with a 2-3/4 inch backset; both are listed as fire rated. Because both Falcon units are passage function with no keyed control, they suit a fire-rated corridor or closet door rather than a classroom opening that has to lock from outside by key.
9) Is there a Grade 1 knob option for thicker doors than the Sargent 8XG37 covers?
Yes. The Corbin Russwin CK4310 Grade 1 passage/closet cylindrical lock with the Global knob covers doors 1-3/8 inch to 2 inch, and the Falcon X101 Grade 1 heavy duty cylindrical knobset covers 1-3/8 inch to 2-1/4 inch. The Sargent 8XG37 is built for doors 1-3/8 inch to 1-3/4 inch. Note that both of those wider-range units are passage functions, so they apply where the opening does not need the keyed classroom control the 8XG37 provides.
10) Can a Kwikset 400P keyed entry knob replace a Sargent 8XG37 on a school door?
No. The Kwikset 400P-CP Polo keyed entry knob is a Grade 3 entrance function for doors 1-3/8 inch to 1-3/4 inch, supplied with a round corner adjustable latch and round corner strike. The Sargent 8XG37 is ANSI/BHMA Grade 1 heavy duty with classroom function, meaning the outside knob is key-controlled only, and it accepts SARGENT standard, Signature and Degree cylinders for master keying. An entrance knob with an inside push button does not deliver classroom control and does not meet a Grade 1 specification.
11) We already run a Sargent keyway building-wide. Does a Cal-Royal BER00 work as a substitute for the 8XG37?
Not for a keyed system match. The Cal-Royal BER00 is a Grade 3 entrance/office knob lock supplied with a Kwikset keyway for doors 1-3/8 inch to 1-3/4 inch, so it will not accept a Sargent key. The Sargent 8XG37 accepts SARGENT standard, Signature and Degree cylinders and can be ordered less cylinder if you are installing your own, which keeps the opening inside an existing Sargent master key system.
12) What finishes does the Sargent 8X classroom knob lock come in?
Three: 03 bright brass clear coated, 10BE dark oxidized satin bronze, and 32D satin stainless steel. All three are offered with either the standard 6-pin cylinder or less cylinder. 32D is the usual pick when you are matching existing commercial hardware in a school or office building.
13) I need the same look on doors that do not need to lock. What matches the Sargent 8X on adjacent openings?
For non-keyed openings in the same building, Grade 1 passage knobs include the Schlage D10S passage latch and the Corbin Russwin CK4310, which covers 1-3/8 to 2 inch doors. The Falcon X101 is a Grade 1 heavy duty passage knobset with interchangeable core and a 1-3/8 to 2-1/4 inch thickness range. Knob styling will differ from the Sargent, so match finish rather than expecting identical trim.
14) Can the Sargent 8XG37 be used on an exterior door?
Yes. The 8X Line knob lock is built for interior and exterior use, is rated heavy duty, and is a commercial lock rather than a residential one. It is Grade 1, which is the durability level specified for high-traffic entries.
15) Is a Lockey 3830 keyless knob lock an alternative to the Sargent 8XG37 for a classroom?
They solve different problems. The Lockey 3830 is a mechanical keyless combination knob lock with an auto-locking passage function for doors 1 3/16 inch to 2 inch, so access is by code with no key and no cylinder. The Sargent 8XG37 is a keyed Grade 1 classroom lock that accepts SARGENT standard, Signature and Degree cylinders, which is what lets it sit in a campus master key system. Choose the Lockey where you want code-based entry and no key management; choose the 8XG37 where the opening has to key to the building.
16) What is the difference between the Sargent 8XG37 and a dummy knob like the BEST 6K single dummy trim?
The BEST 6K Series single dummy trim is a Grade 2 medium duty, non-keyed dummy knob: it is fixed trim with no latch and no locking, used on an inactive leaf or a pull-only door. The Sargent 8XG37 is a keyed Grade 1 classroom lock with a working latch, key-controlled outside knob and SARGENT cylinder compatibility. Dummy trim is ordered alongside a lock on a pair of doors, not as a substitute for it.
How fast can I get the Sargent 28LC-8XG37 LB 10BE 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 28LC-8XG37 LB 10BE come with a warranty?
Absolutely. The Sargent 28LC-8XG37 LB 10BE 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 28LC-8XG37 LB 10BE?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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