Sargent 8XU15 Grade 1 Passage ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$921.00
$578.70
Sargent 8XU15 Grade 1 Passage Knob Lock with 2-3/4" Backset

Sargent 8XU15 Grade 1 Passage Knob Lock with 2-3/4" Backset

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Model: 28-8XU15 LB 32D
$921.00
$578.70
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$921.00
$578.70
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Sargent 8X Line Grade 1 Passage Knob Lock with 2-3/4" Backset

Professional Non-Keyed Cylindrical Lock Solution

The Sargent 8X Line Series Grade 1 Passage Knob Lock delivers commercial-grade security with ANSI/BHMA Grade 1 certification for demanding applications. This non-keyed knob lock features a standard 2-3/4" backset with adjustable range from 2-3/8" to 2-3/4", accommodating door thicknesses from 1-3/8" to 1-3/4". UL-cUL fire-rated up to 3 hours and designed for both interior and exterior applications with reversible, self-adjusting latches.

Professional Features & Benefits

  • Door Compatibility: Accommodates door thicknesses from 1-3/8" to 1-3/4" with adjustable backset from 2-3/8" to 2-3/4" for versatile installation options.
  • Grade 1 Construction: 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.
  • Dual Application Capability: Suitable for both interior and exterior applications with weather-resistant construction.
  • Cylinder Compatibility: Accepts SARGENT standard, Signature and Degree cylinders for flexible master key system integration.
  • Non-Handed Operation: Universal design eliminates handing requirements for streamlined inventory and 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 non-handed installation.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces for proper alignment.
  3. Prepare door and frame by drilling required holes and routing as specified in manufacturer instructions for cylindrical lock installation.
  4. Install all mounting hardware and secure the knob lock to door and frame per manufacturer torque specifications.
  5. Adjust latch operation for proper alignment and verify self-adjusting latch conforms to door bevel for smooth operation.
  6. Test knob 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 8X Line Series knob locks deliver professional-grade reliability with Grade 1 construction designed and tested for robust commercial applications. UL-cUL fire-rated up to 3 hours with 3-year limited warranty coverage provides confidence for demanding installations. Engineered for high-traffic commercial environments where dependable performance and code compliance are essential.

Product Specs

Series:
8X Line Series
Grade:
Grade 1
Keyed Function:
Non-Keyed
Subcategory:
Bored Locksets
Keyed:
No
Commercial/Residential:
Commercial
Handle Type:
Knob
Lock Function:
Passage/Hall/Closet
Product Group:
Mechanical Locks
Product Subgroup:
Bored Locksets
Product Type:
Knobsets
Duty Level:
Heavy Duty
Product Attribute:
Cylindrical Locks
Product Function:
Passage/Hall/Closet
Door Hand Direction:
Non-Handed
Product Category:
Mechanical Locks
Department:
Door Hardware

Sargent 28-8XU15 LB 32D – Frequently Asked Questions

1) Will the Sargent 8XU15 passage knob fit a 1-3/8 inch door, or is it only for 1-3/4 inch commercial doors?
Both. The 8XU15 covers door thicknesses from 1-3/8 to 1-3/4 inches, so it goes on older interior wood doors as well as standard 1-3/4 inch commercial doors without a shim kit or a different chassis. If your openings are thicker than 1-3/4, this is not the lock for them.
2) Do I have to order the Sargent 8XU15 knob lock left hand or right hand?
No handing to specify. The 8XU15 is non-handed, and the latch is reversible and self-adjusting to the door bevel, so one part number covers every opening in the building. That is the practical reason to stock it for a fleet of doors: one lock on the shelf works on any swing.
3) Does the Sargent 8XU15 take a key or a cylinder?
No key and no cylinder. The 8XU15 is non-keyed passage function, knob free from both sides at all times. If you need the same knob but keyed into a master key system, look at a keyed function in the same 8X Line rather than trying to add a cylinder to this one.
4) I need the knob to lock the room. Is the Sargent 8XU15 the right one?
It is not. Passage function means the knob turns freely from both sides and the latch never holds locked. For a restroom or bedroom you want a privacy function, and for an office or entry you want a keyed function such as the BEST 8K entrance knob, which is Grade 1 heavy duty single cylinder. Order the 8XU15 only where you want a latched door anyone can walk through: halls, closets, corridors.
5) What is the closest Grade 1 alternative to a Sargent 8XU15 passage knob lock?
The Corbin Russwin CK4310 is a Grade 1 passage/closet cylindrical lock with a Global knob and a non-keyed function, and it covers doors from 1-3/8 inch to 2 inch thick. The Schlage D10S passage latch is also a Grade 1 heavy duty non-keyed knob lock, using the Orbit knob in the D Series. Both hold the same passage/hall/closet function and Grade 1 rating as the Sargent 8XU15, so either works where a spec calls for a Grade 1 non-keyed knob on a commercial opening. Confirm knob style and finish separately, since the knob design differs across the three.
6) Is there a lighter duty passage knob lock than a Grade 1 Sargent 8XU15 for a low traffic closet door?
Yes. The Corbin Russwin CK4410 is a Grade 2 passage/closet cylindrical lock with a Global knob, non-keyed, for doors 1-3/8 inch to 1-3/4 inch thick. The Falcon W101 is a Grade 2 medium duty passage/closet knob lock with a 2-3/4 inch backset and a fire rating. The Dexter C2000 passage ball knob is Grade 2 non-keyed for the same 1-3/8 inch to 1-3/4 inch door range. All three carry the same passage function as the Sargent 8XU15, which is Grade 1 and heavy duty; the Grade 2 units are cycle tested to a lower ANSI/BHMA threshold, so match the grade to the traffic the door actually sees.
7) Can I use a dummy knob in place of a Sargent 8XU15 passage knob?
No. The Sargent 8XU15 is a passage/hall/closet lock, so it has a working latch that retracts when the knob turns and holds the door closed. A dummy trim has no latch and no moving mechanism; it surface mounts as a pull. The BEST 6K single dummy trim is Grade 2 medium duty, and the Schlage A170 single dummy trim is Grade 2 heavy duty for doors 1-3/8 inch to 1-7/8 inch. Use a dummy only on an inactive leaf or a door held by a ball catch or magnet, and use the 8XU15 wherever the door needs to latch.
8) What Sargent 8X Line style lock do I use if the door needs to lock, not just latch?
The Sargent 8XU15 is non-keyed and does not lock. If the opening needs a key, the BEST 8K Series entrance function single cylinder knob lock is Grade 1 heavy duty, which matches the 8XU15's grade and duty. The Corbin Russwin CK4851 entrance/office cylindrical lock with a Global knob is Grade 1 with a conventional cylinder and covers doors 1-3/8 inch to 2 inch. For a bathroom or bedroom that needs a thumbturn rather than a key, the Dexter C2000 privacy ball knob is a Grade 2 non-keyed privacy function.
9) Is a Grade 1 passage knob worth it over a Grade 2 for a school or office corridor?
Grade 1 is the heavy duty cycle tier and it is what a high-traffic corridor eats through. The 8XU15 is ANSI/BHMA A156.2 Series 4000 Grade 1. If the opening is a low-traffic closet or a back office, a Grade 2 passage knob such as the Arrow MK01 or the Corbin Russwin CK4410 covers the same 1-3/8 to 1-3/4 inch doors at a lighter duty tier. For classroom corridors, restrooms and anywhere in a school on a daily cycle count, stay Grade 1.
10) What finishes does the Sargent 8XU15 knob come in, and which one matches the rest of my building?
Three finishes: 03 bright brass with a clear coat, 10BE dark oxidized satin bronze, and 32D satin stainless steel. On commercial jobs 32D is the usual match for existing hollow metal and stainless hardware, 10BE suits dark bronze storefront and lever sets, and 03 matches polished brass trim. Pick to the finish already on your closers and hinges rather than to the door.
11) Can I use the Sargent 8XU15 on an exterior door?
Yes, the 8XU15 is built for interior and exterior use. Just remember it does not lock. On an exterior opening that means it works only where security is handled by something else on the door, an exit device or a separate deadbolt, and the knob is there purely to latch and operate. If the exterior door needs to secure, choose a keyed function instead.
12) Can I swap a Sargent 8XU15 into the holes left by an old cylindrical knob lock?
Usually yes, if the existing prep is a standard 161 cylindrical bore at either a 2-3/8 or 2-3/4 inch backset, since both backsets are orderable and the latch reverses for either swing. Measure the backset from the door edge to the center of the existing bore before you order, and check the strike lip length against your frame, since the 8XU15 ships with the strike you select rather than a one-size part. If the old lock was mortise rather than bored, the door has to be filled and re-prepped.
13) Which passage knob locks are fire rated like the Sargent 8XU15?
The Sargent 8XU15 is UL-cUL fire rated up to 3 hours. Among comparable passage knob locks, the Falcon W101 Grade 2 passage/closet knob lock carries a fire rating, and the Falcon X101 Grade 1 heavy duty passage knobset is fire rated as well. For a labeled opening, the X101 matches the 8XU15's Grade 1 rating while the W101 is Grade 2 medium duty. Always confirm the hourly rating on the door label matches what the lock is listed for before ordering.
14) I need a decorative passage knob instead of a commercial Sargent 8XU15 - what are the options?
For a residential or historic look, the Baldwin Estate 5011 Colonial passage knob comes with a 5058 rose, and the Baldwin Estate 5000 Baltimore knob is preconfigured as a passage lock with a 2-3/8 inch backset and a full lip strike. The Omnia 434/PA is a traditional egg-shaped knob passage latchset in solid brass with a 3 inch projection. The Sargent 8XU15 is a Grade 1 commercial knob lock, so the trade is aesthetics against the cycle rating; on a high traffic corridor keep the 8XU15 and reserve the decorative knobs for low traffic interior doors.
15) What is the difference between a Sargent 8XU15 and an Arrow MK01 or RK01 passage knob?
All three are non-keyed passage/hall/closet cylindrical knob locks. The Arrow MK01 is Grade 2 in the MK Series and the Arrow RK01 is Grade 2 in the RK Series with a ball knob, both for doors 1-3/8 inch to 1-3/4 inch. The Sargent 8XU15 is Grade 1 and heavy duty, non-handed, and accepts SARGENT standard, Signature and Degree cylinders in the keyed members of the 8X Line if you are standardizing a keyed and non-keyed set across a facility. Where a job spec calls out Grade 1, the Arrow units will not satisfy it.
16) If I am standardizing a school on one knob line, what passage knob competes with the Sargent 8XU15?
For a facility standard, the practical Grade 1 field is the Sargent 8XU15, the Corbin Russwin CK4310 Grade 1 passage/closet lock with a Global knob covering doors to 2 inch, the Schlage D10S Grade 1 heavy duty passage latch with an Orbit knob, and the Falcon X101 Grade 1 heavy duty passage knobset with an interchangeable core. If the same line must also cover classroom and entry doors, Corbin Russwin offers the Grade 1 CK4851 entrance/office lock with a conventional cylinder, and Dexter offers a Grade 2 C2000 classroom ball knob lock. Pick the line that carries every function the building needs so trim and knob style stay consistent door to door.
17) I need matching non-operating trim on the inactive leaf. Does Sargent 8X offer a dummy to go with the 8XU15?
Yes, the 8X Line includes dummy trim, and Sargent publishes separate dummy trim installation instructions alongside the 8X Line instructions. Pairing a passage 8XU15 on the active leaf with 8X dummy trim on the inactive leaf keeps the knob shape and finish identical across the pair. Order the dummy in the same finish code, 03, 10BE or 32D.
How fast can I get the Sargent 28-8XU15 LB 32D 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 28-8XU15 LB 32D come with a warranty?
Absolutely. The Sargent 28-8XU15 LB 32D 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 28-8XU15 LB 32D?
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