BEST 6K Series Hospital Privac...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$291.00
$205.21
BEST BEST 6K Series - Hospital Privacy (LL) Function Grade 2 Non-Keyed Knob Locks BEST-6K-LL

BEST 6K Series Hospital Privacy Non-Keyed Knob Lock Grade 2 Cylindrical Lockset

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Model: 6K30LL4CSTK626
$291.00
$205.21
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$291.00
$205.21
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BEST 6K Series Hospital Privacy Non-Keyed Knob Lock Grade 2 Cylindrical Lockset

Professional Grade 2 Cylindrical Lockset for Healthcare Applications

The BEST 6K Series Hospital Privacy (LL) Function knob lock delivers reliable performance for standard traffic healthcare applications. This Grade 2 cylindrical lockset features a 2 1/16" diameter case for 2 1/8" bore installation with door thickness compatibility from 1 3/8" to 1 7/8". Built with brass and bronze components plus corrosion-treated internal steel mechanisms, this non-keyed lockset exceeds ANSI Grade 2 standards and includes BEST interchangeable core capability for flexible key system integration.

Professional Features & Benefits

  • Door Thickness Compatibility: Standard installation on doors from 1 3/8" to 1 7/8" thick with threaded outside rose adjustment for precise fit.
  • Grade 2 Performance: Exceeds ANSI Grade 2 standards and BHMA A156.2 Series 4000 Grade 2 listing for reliable commercial performance.
  • Interchangeable Core System: Quick rekeying capability with BEST interchangeable core and includes two nickel silver keys keyed to your system.
  • Heavy-Duty Construction: Brass and bronze component parts with corrosion-treated internal steel mechanisms for long-term durability in normal atmospheric conditions.
  • Concealed Mounting Design: Snap-on inside rose with no exposed mounting screws and concealed rose mounting screws for clean appearance.
  • Fire Rating Compliance: UL Listed for use on 3-hour A label single doors (4' x 8') for code compliance applications.
  • Reversible Installation: Lockset reversible for either hand of door without removing keyed knob for installation flexibility.
  • Standard Latch Configuration: 1/2" throw deadlocking latch with 2 1/4" x 1" x 5/32" front for secure latching performance.

Technical Specifications

  • Commercial/Residential: Commercial
  • Department: Door Hardware
  • Duty Level: Medium Duty
  • Electronic: No
  • Grade: Grade 2
  • Handle Type: Knob
  • Keyed: No
  • Keyed Function: Non-Keyed
  • Product Attribute: Cylindrical Locks
  • Product Category: Mechanical Locks
  • Product Function: Hospital Privacy
  • Product Group: Mechanical Locks
  • Product Subgroup: Bored Locksets
  • Product Type: Knobsets
  • Series: 6K Series
  • Standard Latch: 1/2" Throw
  • Standard Strike: 2-3/4" x 1-1/8" with Curved Lip
  • Subcategory: Bored Locksets

Installation & Operation

  1. Review manufacturer specifications and verify door preparation requirements including 2 1/8" diameter bore for lock housing and door thickness from 1 3/8" to 1 7/8".
  2. Use manufacturer-provided templates to mark mounting hole locations accurately including 1" diameter or 7/8" diameter bore for latch tube.
  3. Prepare door by drilling required 2 1/8" bore and latch tube hole as specified in manufacturer instructions.
  4. Install latch assembly and secure the lockset to door with threaded outside rose adjusted for proper door thickness.
  5. Install snap-on inside rose ensuring concealed mounting and verify keyed knob is properly secured after core installation.
  6. Test lockset operation to verify proper function of hospital privacy mechanism and make final adjustments as needed. Refer to manufacturer documentation for complete installation details and troubleshooting.

Professional Applications

  • Healthcare Facility Patient Rooms
  • Hospital Privacy Areas
  • Medical Office Buildings
  • Assisted Living Facilities
  • Rehabilitation Centers
  • Outpatient Treatment Facilities
  • Long-Term Care Facilities

Why Choose BEST Quality?

BEST 6K Series locksets deliver professional-grade reliability with brass and bronze construction and corrosion-treated internal steel mechanisms rated to exceed ANSI Grade 2 standards. UL Listed for 3-hour fire rating applications and BHMA certified for Series 4000 Grade 2 performance. Engineered for demanding commercial healthcare applications where dependable privacy function and long-term durability are essential.

Product Specs

Series:
6K Series
Grade:
Grade 2
Duty Level:
Medium Duty
Keyed Function:
Non-Keyed
Standard Latch:
1/2" Throw
Standard Strike:
2-3/4" x 1-1/8" with Curved Lip
Product Group:
Mechanical Locks
Product Subgroup:
Bored Locksets
Product Type:
Knobsets
Subcategory:
Bored Locksets
Keyed:
No
Electronic:
No
Commercial/Residential:
Commercial
Handle Type:
Knob
Product Attribute:
Cylindrical Locks
Product Function:
Hospital Privacy
Product Category:
Mechanical Locks
Department:
Door Hardware

BEST 6K30LL4CSTK626 – Frequently Asked Questions

1) What does hospital privacy (LL) function mean on a BEST 6K knob lock?
Hospital privacy is a non-keyed function meant for patient room and toilet doors: the occupant can secure the door from the inside, and staff can release it from the outside without a key. The BEST 6K LL lockset is non-keyed, so there is no cylinder to key and no keyway to match on your master system. If you need a door that locks with a key from outside, this is the wrong function.
2) Will the BEST 6K hospital privacy knob lock fit a 1-3/8 inch door, and what bore does it need?
It covers doors from 1-3/8 inch up to 1-7/8 inch, using the threaded outside rose to take up the difference, so both older 1-3/8 inch interior doors and standard 1-3/4 inch commercial doors are in range. Door prep is a 2-1/8 inch cross bore for the 2-1/16 inch diameter case, plus a 1 inch or 7/8 inch bore for the latch tube.
3) Which backset do I order for a BEST 6K knob lock, and can it handle a wide stile aluminum or a thick door frame?
Four backsets are offered: 2-3/8, 2-3/4, 3-3/4 and 5 inches. The 2-3/8 and 2-3/4 inch options cover almost all standard wood and hollow metal doors, while the 3-3/4 and 5 inch backsets exist for doors with a deep stile or lock rail. Measure from the door edge to the center of the existing 2-1/8 inch bore and match it exactly.
4) Will the BEST 6K latch drop into my existing strike, or do I need to cut the frame?
The latch has a 1/2 inch throw with a 2-1/4 x 1 x 5/32 inch front, which is the standard cylindrical lock face, so it normally goes straight into an existing prep. Strike choice is yours at order: STK standard strike (2-3/4 x 1-1/8 inch with curved lip) or the S3 ANSI strike. Pick STK when you are replacing a lock in a frame with the common curved lip strike prep, and S3 when the frame is prepped for the full ANSI 4-7/8 inch strike.
5) Can I use the BEST 6K hospital privacy lock on a fire rated patient room door?
Yes. The 6K lockset is UL Listed for use on 3-hour A label single doors up to 4 by 8 feet, and the latch is a deadlocking latch, which is what a fire door assembly requires.
6) What is a comparable Grade 2 privacy knob lock to the BEST 6K Series hospital privacy lockset?
The closest Grade 2 privacy knob in the same class is the Dexter C2000 Series privacy cylindrical ball knob lock, a Grade 2 non-keyed privacy/bed/bath function knob for doors 1-3/8 inch to 1-3/4 inch thick. The BEST 6K is also Grade 2 and non-keyed, but its function is hospital privacy rather than standard privacy, and it fits doors 1-3/8 inch to 1-7/8 inch. If the opening is a patient room where staff need outside release, the hospital privacy function is the one to hold; if it is a standard restroom or bedroom door, the Dexter privacy knob covers it.
7) Which knob locks look like a substitute for a hospital privacy lock but are not?
Passage and dummy knobs are the most common mistakes. The Corbin Russwin CK4410 is a Grade 2 non-keyed passage/closet knob and the Falcon W101 is a Grade 2 passage/closet latch knob - both are non-keyed like the BEST 6K, but a passage knob has no locking at all, so it cannot provide privacy at a patient room. The Schlage A170 is a Grade 2 single dummy trim with no latch at all. Only a privacy or hospital privacy function knob gives the occupant the ability to secure the door.
8) If the patient room door needs to be keyed instead of non-keyed, what replaces the BEST 6K hospital privacy knob?
The BEST 6K hospital privacy is a non-keyed function. For a keyed cylindrical knob on the same type of opening, the Sargent 6G04 is a Grade 2 storeroom/closet knob with a single cylinder, the Corbin Russwin CK4851 is an entrance/office cylindrical knob with a conventional cylinder for doors 1-3/8 inch to 2 inch, and the Dexter C2000 entry/office knob is a Grade 2 keyed knob for doors 1-3/8 inch to 1-3/4 inch. Storeroom keeps the door latched at all times; entrance/office allows the outside knob to be left unlocked.
9) Is this knob lock handed, or does one part number work on both left and right hand doors?
It is reversible for either hand of the door, and the reversal is done without removing the knob, so one lockset covers both hands. You do not specify handing when ordering.
10) Is Grade 2 enough for hospital patient room doors, or should I step up to Grade 1?
The 6K is a medium duty, Grade 2 cylindrical lock certified to BHMA A156.2 Series 4000 Grade 2, which is sized for standard traffic openings such as patient rooms, offices and treatment rooms. For high traffic corridor or entry doors, a Grade 1 cylindrical is the better choice, for example the Corbin Russwin CK4310 Grade 1 or the Falcon X101 Grade 1 with interchangeable core.
11) Which rose size should I pick to cover the old holes on my doors?
Two roses are available: the 2-9/16 inch standard and a 3-3/8 inch. Go with the 3-3/8 inch when you are replacing a lock that had a larger trim and left marks or extra holes around the bore; the 2-9/16 inch is the normal choice on new prep. Either way the inside rose snaps on with no exposed mounting screws.
12) Is there a lower-cost privacy knob than the BEST 6K for light-traffic doors?
For residential or light commercial doors, the Cal-Royal BER20 is a Grade 3 privacy knob lock with brass trim for doors 1-3/8 inch to 1-3/4 inch, and the Pamex FTF Baron is a Grade 3 privacy knob for the same thickness range. Both step down from the Grade 2, medium duty rating the BEST 6K carries, and neither is a hospital privacy function. Where the specification calls for ANSI Grade 2 or a UL Listed 3-hour fire door, stay with the 6K.
13) What should I use instead of the BEST 6K if the door needs Grade 1 heavy duty knob hardware?
For a Grade 1 cylindrical knob, the Falcon X101 is a heavy duty Grade 1 passage knobset with an interchangeable core and a 1-3/8 inch to 2-1/4 inch door thickness range, the Schlage D10S is a Grade 1 heavy duty passage knob, and the Sargent 8XG04 is a Grade 1 heavy duty storeroom knob with a 2-3/4 inch backset. All three are different functions from the BEST 6K, which is Grade 2 medium duty hospital privacy. The X101 shares the interchangeable core approach the 6K series uses.
14) Can I use a Baldwin or Deltana privacy knob in place of the BEST 6K on a healthcare door?
The Baldwin Estate 5077 Bethpage privacy knob with R027 rose, the Baldwin Estate 5000 Baltimore privacy knob with a 2-3/8 inch backset and full lip strike, and the Deltana 6112 St. Thomas privacy knob for doors 1-3/8 inch to 2 inch are all privacy-function decorative knobs aimed at residential and architectural interiors. The BEST 6K is a commercial Grade 2 hospital privacy cylindrical lockset with a 1/2 inch throw deadlocking latch and BEST interchangeable core capability, and it offers 2-3/8, 2-3/4, 3-3/4 and 5 inch backsets. Where a healthcare specification calls for ANSI Grade 2 performance and a fire rated opening, the decorative privacy knobs are a different product class.
15) What is the closest knob lock to the BEST 6K if the door is thicker than 1-7/8 inch?
The BEST 6K covers doors 1-3/8 inch to 1-7/8 inch thick. For thicker doors, the Corbin Russwin CK4310 Grade 1 passage/closet knob and the CK4851 entrance/office knob both list 1-3/8 inch to 2 inch, and the Falcon X101 Grade 1 passage knobset lists 1-3/8 inch to 2-1/4 inch. Each is a different function than hospital privacy, so confirm the opening will accept passage or keyed operation before substituting.
16) What finishes does the BEST 6K knob lockset come in for matching existing hardware?
Seven finishes: 605 bright brass, 606 satin brass, 611 bright bronze, 612 satin bronze, 613 satin bronze oil-rubbed, 625 bright chrome and 626 satin chrome. Those are BHMA finish numbers, so 626 satin chrome matches the US26D hardware already on most commercial and healthcare openings.
17) This is non-keyed, so why does BEST say it takes an interchangeable core?
The 6K family is built around the BEST interchangeable core so the same chassis and trim carry across keyed and non-keyed functions in a building. The hospital privacy version is non-keyed, so it does not operate on a key and there is nothing to rekey on this function, but the trim and case match the keyed 6K locks on adjacent doors.
How fast can I get the BEST 6K30LL4CSTK626 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 BEST 6K30LL4CSTK626 come with a warranty?
Absolutely. The BEST 6K30LL4CSTK626 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 BEST 6K30LL4CSTK626?
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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