Sargent 6U15 Grade 2 Passage K...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$292.00
$188.40
Sargent 6U15 Grade 2 Passage Knob Lock with 2-3/8" Backset Non-Keyed Standard Duty

Sargent 6U15 Grade 2 Passage Knob Lock with 2-3/8" Backset Non-Keyed Standard Duty

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Model: 28-6U15 OB 26D
$292.00
$188.40
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$292.00
$188.40
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Sargent 6 Line Series Grade 2 Passage Knob Lock with 2-3/8" Backset

Professional Standard Duty Cylindrical Lock Solution

The Sargent 6 Line Series Grade 2 passage knob lock delivers reliable performance for commercial applications with ANSI/BHMA Grade 2 certification. This non-keyed passage function lock features a standard 2-3/8" backset and accommodates door thickness from 1-3/8" to 1-3/4". The lock installs with just two lockbody screws for simplified installation and maintenance, while offering UL-cUL fire rating up to 3 hours for code compliance applications.

Professional Features & Benefits

  • Door Compatibility: Accommodates door thickness from 1-3/8" to 1-3/4" with standard 2-3/8" backset for versatile installation options.
  • Easy Installation: Installs with just two lockbody screws for simplified installation and reduced maintenance requirements.
  • Fire-Rated Performance: UL-cUL listed with fire rating up to 3 hours for code-compliant applications in commercial buildings.
  • Grade 2 Durability: ANSI/BHMA Grade 2 certification ensures reliable performance in standard duty commercial applications.
  • Versatile Configuration: Multiple latch and strike options available with broad spectrum of functions, designs and finishes for customized applications.
  • Anti-Microbial Option: Available with optional MicroShield® antimicrobial coating for enhanced hygiene in healthcare and food service environments.
  • Unified Appearance: Complements and blends with trim designs of other Sargent locks for consistent building aesthetics.
  • Manufacturer Warranty: 1-year limited warranty 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 from 1-3/8" to 1-3/4", standard 2-3/8" backset, and non-handed installation compatibility.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door surfaces for proper lockbody positioning.
  3. Prepare door by drilling required holes and routing as specified in manufacturer instructions for cylindrical lock installation.
  4. Install lockbody using the two mounting screws and secure trim components per manufacturer torque specifications.
  5. Adjust latchbolt operation for proper alignment and smooth operation throughout the full range of motion.
  6. Test lock 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

Anti-Microbial Option

Optional MicroShield® antimicrobial coating is available for enhanced hygiene protection in healthcare facilities, food service areas, and other environments where antimicrobial properties are beneficial for infection control and cleanliness maintenance.

Why Choose Sargent Quality?

Sargent 6 Line Series knob locks deliver professional-grade reliability with ANSI/BHMA Grade 2 certification and UL-cUL fire rating up to 3 hours for demanding commercial applications. The simplified two-screw installation design reduces labor costs while maintaining the durability and performance standards required for commercial door hardware. Engineered for demanding commercial applications where dependable performance and code compliance are essential.

Product Specs

Series:
6 Line Series
Grade:
Grade 2
Keyed Function:
Non-Keyed
ANSI/BHMA:
F75
Subcategory:
Bored Locksets
Keyed:
No
Commercial/Residential:
Commercial
Handle Type:
Knob
Lock Function:
Passage
Product Group:
Mechanical Locks
Product Subgroup:
Bored Locksets
Product Type:
Knobsets
Duty Level:
Standard Duty
Product Attribute:
Cylindrical Locks
Product Function:
Passage/Hall/Closet
Door Hand Direction:
Non-Handed
Product Category:
Mechanical Locks
Department:
Door Hardware

Sargent 28-6U15 OB 26D – Frequently Asked Questions

1) Will the Sargent 6U15 passage knob lock fit a 1-3/8 inch door, or is it only for 1-3/4 inch commercial doors?
Both. The 6U15 covers door thickness from 1-3/8 inch to 1-3/4 inch, so it works on the standard 1-3/4 inch commercial door and on the thinner 1-3/8 inch interior doors common in older buildings. Anything thicker than 1-3/4 inch is outside its range.
2) Can a passage knob lock be used on a fire rated door in a commercial corridor?
The Sargent 6U15 is UL-cUL listed with a fire rating up to 3 hours, so it is suitable for fire rated openings. It is a passage function, meaning both knobs always retract the latch with no locking, which is what you want on corridor, hall and closet doors that must stay operable.
3) Is a Grade 2 passage knob enough for a school or hospital corridor, or should I step up to Grade 1?
The Sargent 6U15 carries ANSI/BHMA Grade 2 and is rated standard duty, which suits normal commercial traffic in offices, retail and multi-tenant residential. For very high traffic openings, a Grade 1 heavy duty passage knob is the step up: the Schlage D10S and the Falcon X101 are both Grade 1 heavy duty passage knobsets, and the Falcon X101 also covers thicker doors up to 2-1/4 inches.
4) The Sargent 6U15 is non-keyed. What do I order for the same doors when the room needs to lock?
Pick the function rather than the trim. For a keyed office or entry opening, the Corbin Russwin CK4851 is a Grade 2 entrance/office cylindrical knob lock with a conventional cylinder, and the Dexter C2000 entry/office ball knob lock is Grade 2 keyed for 1-3/8 inch to 1-3/4 inch doors. For a bed or bath, the Dexter C2000 privacy ball knob is Grade 2 non-keyed privacy. For a classroom opening, the Dexter C2000 classroom knob lock is Grade 2 keyed. The 6U15 is passage only, with no cylinder and no locking.
5) What is a direct cross-brand equivalent to the Sargent 6U15 passage knob lock?
The closest straight equivalents are the Corbin Russwin CK4410, a Grade 2 non-keyed passage/closet cylindrical lock with a Global knob and a 1-3/8 inch to 1-3/4 inch door thickness range, and the Dexter C2000 Grade 2 passage cylindrical ball knob lock, also 1-3/8 inch to 1-3/4 inch. All three are Grade 2, non-keyed passage function knob locks for the same door thickness range, so any of them drops into a hall or closet opening prepped for a cylindrical knob set.
6) Is a dummy knob the same thing as the Sargent 6U15 passage lock?
No. The 6U15 is a passage function lock with an operating latchbolt, so the knob turns and retracts a latch. A dummy knob is fixed trim with no latch at all, used on inactive leaves and closet fronts that catch or stay shut by other means. Dummy options include the Schlage A170 Grade 2 single dummy trim, the BEST 6K Grade 2 single dummy trim, and the Cal-Royal BA40 dummy knob for 1-3/8 inch to 1-3/4 inch doors. If the door has a latch bore and a strike, you want the passage lock, not dummy trim.
7) If I need a heavier duty passage knob than the Sargent 6U15, what should I use?
Step up to a Grade 1 passage knob. The Corbin Russwin CK4310 is a Grade 1 non-keyed passage/closet cylindrical lock with a Global knob and a wider 1-3/8 inch to 2 inch door thickness range. The Falcon X101 is a Grade 1 heavy duty cylindrical passage knobset with interchangeable core, fire rated, covering 1-3/8 inch to 2-1/4 inch doors. The Schlage D10S is a Grade 1 heavy duty passage latch with an Orbit knob. The 6U15 itself is ANSI/BHMA Grade 2, standard duty.
8) Do I have to worry about handing when ordering a Sargent 6U15 knob lock?
No. The 6U15 is non-handed, so one lock covers left and right hand doors. That is useful for a property manager stocking spares, since a single part number fits every passage opening in the building regardless of swing.
9) What ANSI function code is the Sargent 6U15, and what does it mean on a spec?
It is ANSI/BHMA function F75, the passage or closet latch. Both knobs are always free, there is no cylinder and no inside button. If your drawing calls out F75 for hall and closet doors, the 6U15 answers it.
10) What finishes does the Sargent 6U15 knob lock come in for matching the rest of the building?
Three finishes: 26D satin chrome over nickel, 03 bright brass clear coated, and 10BE dark oxidized satin bronze. 26D is the usual commercial standard and the one most likely to match existing Sargent trim on other openings, since the 6 Line trim is made to blend with Sargent's other lock lines.
11) Can I use the Sargent 6U15 on a bathroom or bedroom door?
Not if you need it to lock. Passage function means no privacy button and no way to secure the door from inside. For a bath or bedroom, order a privacy function knob instead, such as the Dexter C2000 Grade 2 privacy ball knob or the Cal-Royal BER20 privacy knob, both of which fit 1-3/8 to 1-3/4 inch doors.
12) What are the lower-cost commercial alternatives to the Sargent 6U15 passage knob?
Two Arrow Grade 2 non-keyed passage cylindrical knob locks cover the same 1-3/8 inch to 1-3/4 inch door range: the MK01 from the MK Series and the RK01 from the RK Series with a ball knob. The Falcon W101 is a Grade 2 medium duty passage/closet knob lock with a 2-3/4 inch backset and a fire rating. For Grade 3 light commercial or residential work, the Pamex FTF Baron passage knob lockset fits 1-3/8 inch to 1-3/4 inch doors. The 6U15 is Grade 2 standard duty and carries a UL-cUL fire rating up to 3 hours.
13) Can I use a decorative passage knob instead of the Sargent 6U15 in an office corridor?
Decorative passage knobs are built for residential and design-led interiors rather than commercial traffic. The Baldwin Estate 5011 Colonial passage knob with 5058 rose and the Baldwin Estate 5000 Baltimore knob passage lock with 2-3/8 inch backset and full lip strike are passage function but are Estate residential trim. The Omnia 434/PA is a solid brass egg-shaped knob latchset. The Bravura Albany, Lynchburg, and Dallas passage knobsets are Grade 2. The 6U15 is a commercial Grade 2 standard duty lock with a UL-cUL fire rating up to 3 hours, which is what a fire-rated corridor opening needs.
14) I need the same door to lock without keys - is there a passage knob alternative to the Sargent 6U15 with a code?
The Lockey 3830 is a mechanical keyless combination knob lock with an auto-locking passage function, fitting doors from 1-3/16 inch to 2 inch. It controls entry by code rather than by key. The Sargent 6U15 is a straight non-keyed passage lock with no locking mechanism of any kind, so if the opening needs to be restricted the 3830 is the different tool for that job.
15) If I am standardizing a facility on interchangeable cores, is the Sargent 6U15 the right passage lock?
The 6U15 is non-keyed passage function, so it has no cylinder to core in either direction - it blends with other Sargent trim designs for a consistent look across the building. If you want the passage openings to carry the same core platform as the keyed ones, the Falcon X101 is a Grade 1 heavy duty passage knobset with interchangeable core, and on the keyed side the BEST 8K Series is a Grade 1 heavy duty entrance function knob lock.
16) Is there an antimicrobial version of the Sargent 6 Line knob for a healthcare facility?
Yes, the 6 Line can be specified with MicroShield antimicrobial coating. That is the option to call out for patient corridors, exam rooms and food service areas where infection control drives the hardware spec.
17) For a residential-grade hall and closet retrofit, what is an alternative to the Sargent 6U15?
The Kwikset 200P Polo passage knob ships with a 6AL latch and RCS round corner strike, and the 200P-CP clear pack version includes a round corner adjustable latch and round corner strike. The Schlage Residential F500 Plymouth with Georgian knob is a combo pack with adjustable backsets and dual strikes for 1-3/8 inch to 1-3/4 inch doors. These are residential lines; the 6U15 is a commercial ANSI/BHMA Grade 2 lock, which is the difference that matters if a spec or inspection is involved.
How fast can I get the Sargent 28-6U15 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 28-6U15 OB 26D come with a warranty?
Absolutely. The Sargent 28-6U15 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 28-6U15 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
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