Sargent 28C-KNOB Exit Device T...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$360.36
$194.59
Sargent 28C-KNOB Exit Device Trim with Knob and Rose Entrance Function for 1-3/4" Doors

Sargent 28C-KNOB Exit Device Trim with Knob and Rose Entrance Function for 1-3/4" Doors

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Model: 28C-OB-26D
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$360.36
$194.59
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Sargent 28 Series Exit Device Trim with Knob and Rose for 1-3/4" Doors

Professional Exit Device Trim Solution

The Sargent 28 Series Exit Device Trim features knob and rose entrance function specifically engineered for 1-3/4" doors. This non-handed trim provides universal compatibility with all 20 Series Exit Devices, offering flexible installation options for commercial door applications. Available in functions 04, 13, and 15 to meet various operational requirements with traditional knob and rose design for professional appearance.

Professional Features & Benefits

  • Door Compatibility: Engineered specifically for 1-3/4" doors for precise fit and optimal performance in commercial applications.
  • Universal Series Compatibility: Works with all 20 Series Exit Devices for versatile installation options and system integration flexibility.
  • Non-Handed Design: Universal configuration eliminates handing concerns and simplifies inventory management for installers.
  • Multiple Function Options: Available in functions 04, 13, and 15 to accommodate different operational and security requirements.
  • Knob and Rose Configuration: Traditional knob and rose design provides familiar operation and professional appearance for commercial settings.
  • Professional Construction: Sargent precision engineering ensures reliable performance 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, stile width, and handing as applicable to this product.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and/or 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

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

Why Choose Sargent Quality?

Sargent 28 Series trim products deliver professional-grade reliability with precision engineering designed for 1-3/4" door applications. The universal compatibility with 20 Series Exit Devices and non-handed design ensures flexible installation options for demanding commercial applications where dependable performance is essential.

Product Specs

Series:
28 Series
Keyed Function:
Keyed
Subcategory:
Bored Locksets
Keyed:
No
Commercial/Residential:
Commercial
Handle Type:
Knob
Lock Function:
Classroom
Product Group:
Mechanical Locks
Product Subgroup:
Bored Locksets
Product Type:
Knobsets
Product Attribute:
Cylindrical Locks
Product Function:
Classroom
Door Hand Direction:
Non-Handed
Product Category:
Mechanical Locks
Keyway Options:
Sargent LA
Design Rose/Escutcheon:
O-Rose
Knob Style Type:
B-Knob
Department:
Door Hardware

Sargent 28C-OB-26D – Frequently Asked Questions

1) Is the Sargent 28 Series knob trim a complete lockset, or does it need an exit device?
It is trim only. The 28 Series knob and rose is the outside trim for a Sargent 20 Series exit device, so the device itself does the latching. Ordering it as a standalone door lock will leave you without a latch. If you need a self-contained knob lock instead, look at a cylindrical knobset such as the Dexter C2000 classroom knob lock.
2) What does the classroom function do on this Sargent 28 trim?
Classroom function means the outside knob is locked and unlocked by key only, with no inside button. Turn the key to lock, and the knob stays locked until someone keys it back. Egress from inside is always free through the exit device. It is the standard choice for school and institutional corridor doors where staff control locking.
3) What keyway does the Sargent 28 knob trim use, and can it go on our existing master key system?
It is set up for the Sargent LA keyway. If your building is already keyed in Sargent LA, this trim drops into that system. If your masterkey system runs a different keyway or another manufacturer's, this will not key alike to it.
4) What is the closest alternative to the Sargent 28C knob trim if the door has an exit device from another manufacturer?
The Sargent 28C knob and rose trim is built to mate with Sargent 20 Series exit devices, so it is not a drop-in on another maker's device. For a non-Sargent device, the Imperial USA ED-BKL580 is a knob trim made for the ED-500 Series exit device in a storeroom function. Match the trim to the device family on the door rather than to the knob shape.
5) Which functions are offered on the Sargent 28 Series knob trim?
Three: 04, 13, and 15. Pick the one that matches how the opening has to behave, then confirm the same function suffix on the 20 Series device it mounts to so the two agree.
6) We want classroom function but the door has no exit device. What should we look at?
A cylindrical classroom knob lock handles that opening on its own. The Dexter C2000 Series classroom knob lock is Grade 2, keyed, and fits doors 1-3/8 to 1-3/4 inches. The Sargent 28 trim only works where a 20 Series exit device is already on the door.
7) What is a Grade 1 knob lockset option if I want a heavy duty keyed knob on a door without an exit device?
The Sargent 28C is exit device trim, so for a self-contained heavy duty keyed knob lock look at the BEST 8K Series entrance function single cylinder Grade 1 heavy duty knob lock, or the Corbin Russwin CK4851 entrance/office cylindrical lock with a Global knob and conventional cylinder, listed Grade 1 for doors 1-3/8 inch to 2 inch thick.
8) Does a dummy knob work as a substitute for the Sargent 28C trim on the pull side of an exit device door?
No. A dummy knob such as the Schlage A170 single dummy trim or the BEST 6K Series single dummy is surface trim with no spindle connection to a latch, so it cannot retract or hold anything. The Sargent 28C is keyed classroom trim that operates through the Sargent 20 Series device. Use a dummy only where the knob is purely a pull.
9) What is the difference between the Sargent 28C classroom trim and a passage knob set?
The Sargent 28C is keyed classroom function on the Sargent LA keyway, so a key controls whether the outside knob operates. Passage knob sets such as the Schlage D10S Grade 1 orbit knob passage latch, the Falcon X101 Grade 1 cylindrical passage knobset with interchangeable core, or the Arrow MK01 Grade 2 passage knob are non-keyed and always free-turning. Choose passage only where no locking is wanted.
10) For a residential-grade interior door, is the Sargent 28C the wrong choice?
Yes. The Sargent 28C is commercial exit device trim in a classroom function, which only makes sense on an opening with a Sargent 20 Series device. For interior residential doors, Grade 3 knob sets such as the Pamex FTF Baron privacy or passage locksets for 1-3/8 inch to 1-3/4 inch doors, or the Cal-Royal BER20 Grade 3 privacy knob lock, suit the application.
11) I need a knob lock for doors thicker than 1-3/4 inch - what are the options?
The Sargent 28C knob and rose trim is built for 1-3/4 inch doors. Where the door is thicker, the Falcon X101 cylindrical passage knobset covers 1-3/8 inch to 2-1/4 inch, the Corbin Russwin CK4310 Grade 1 passage/closet knob covers 1-3/8 inch to 2 inch, and the Deltana 6171 Round Knob entry set covers 1-3/8 inch to 2 inch.
12) What knob and rose style is this, and what finish does it come in?
A B-knob on a round O-rose, offered in 26D satin chromium plated over nickel. That is the common brushed chrome look on commercial openings, so it lines up with most existing 26D lever and knob trim in a facility.
13) Can I use a lever instead of the knob on the Sargent 28C, and does handing change?
The Sargent 28C is a B-Knob with an O-Rose and is non-handed, so it installs without specifying left or right. If a lever is required for accessibility on the opening, that is a different trim style rather than a substitution within the knob and rose configuration.
How fast can I get the Sargent 28C-OB-26D delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
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 28C-OB-26D come with a warranty?
Absolutely. The Sargent 28C-OB-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 28C-OB-26D?
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
Why buy the Sargent 28C-OB-26D from ZenSupply?
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