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

BEST 6K Series Patio Function Grade 2 Cylindrical Knob Lock

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Model: 6K30P4CSTK626
$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 Patio Function Grade 2 Cylindrical Knob Lock

Professional Non-Keyed Knob Lock for Standard Traffic Applications

The BEST 6K Series Patio Function knob lock delivers Grade 2 performance for standard traffic commercial applications. This cylindrical knob lock features a 2 1/8" bore mounting system with 1/2" throw deadlocking latch and accommodates door thickness from 1 3/8" to 1 7/8". Built with brass and bronze components plus corrosion-treated internal steel mechanisms, this lockset exceeds ANSI Grade 2 standards and provides BHMA A156.2 Series 4000 compliance.

Professional Features & Benefits

  • Door Compatibility: Designed for 1 3/8" to 1 7/8" door thickness with 2 1/8" diameter bore for versatile installation options.
  • Grade 2 Performance: Exceeds ANSI Grade 2 standards and meets BHMA A156.2 Series 4000 requirements for reliable commercial use.
  • Quick Rekeying System: BEST interchangeable core allows rapid key changes without lockset removal for enhanced security management.
  • Durable Construction: Brass and bronze component parts with corrosion-treated internal steel mechanisms provide long-term reliability.
  • Concealed Mounting: Snap-on inside rose design eliminates exposed mounting screws for clean appearance and tamper resistance.
  • Reversible Operation: Lockset reversible for either hand of door without removing keyed knob for installation flexibility.
  • Fire Rating Compliance: UL Listed for use on 3-hour A label single doors up to 4' x 8' for code compliance applications.
  • Deadlocking Security: 1/2" throw deadlocking latch with curved lip strike provides 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: Patio/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 door thickness between 1 3/8" and 1 7/8", 2 1/8" diameter bore, and handing as applicable to this product.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces including 1" diameter latch tube bore.
  3. Prepare door and frame by drilling required holes and routing as specified in manufacturer instructions.
  4. Install threaded outside rose adjustable for door thickness and snap-on inside rose with concealed mounting screws per manufacturer torque specifications.
  5. Adjust operational components for proper alignment, latching, and smooth operation throughout the full range of motion with 1/2" throw deadlocking latch.
  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 BEST Quality?

BEST 6K Series cylindrical locks deliver professional-grade reliability with brass and bronze construction and corrosion-treated internal mechanisms that exceed ANSI Grade 2 standards. UL Listed for 3-hour fire rating applications and BHMA certified for Series 4000 compliance, these locksets provide the dependable performance required for demanding commercial applications where long-term security and 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:
Patio/Privacy
Product Category:
Mechanical Locks
Department:
Door Hardware

BEST 6K30P4CSTK626 – Frequently Asked Questions

1) What does patio function mean on the BEST 6K knob lock, and is it keyed?
Patio function means it locks from the inside only, with no key and no outside cylinder. The 6K Patio is a non-keyed lockset, so you push or turn the inside button to lock the door and there is no way to release it from the outside. Use it on bathrooms, bedrooms, patio doors and other openings where the occupant controls the lock. If you need key control from the corridor side, this is the wrong function.
2) Will the BEST 6K knob lock fit a 1-3/4 inch commercial door?
Yes. The 6K accepts door thickness from 1-3/8 to 1-7/8 inches, so standard 1-3/4 inch commercial doors are covered, as are 1-3/8 inch interior doors. The outside rose is threaded and adjusts for thickness, so you are not ordering a thickness-specific part.
3) What door prep does the BEST 6K cylindrical knob lock need?
A 2-1/8 inch diameter cross bore through the face of the door and a 1 inch diameter latch tube bore in the edge. That is the standard cylindrical prep, so the 6K drops into most existing bored openings without new holes. Pick the backset to match the hole you already have: 2-3/8, 2-3/4, 3-3/4 or 5 inches are all available.
4) Will the BEST 6K latch work with the strike already in my frame?
The latch has a 1/2 inch throw with a deadlocking plunger, and the supplied standard strike is 2-3/4 by 1-1/8 inches with a curved lip, which is the common residential-style prep. If your frame is prepped for an ANSI strike box instead, order the S3 ANSI strike option so the strike matches the existing cutout rather than having to patch and re-rout the jamb.
5) Can I use the BEST 6K patio knob on a fire rated door?
Yes. The 6K is UL Listed for 3-hour A label single doors up to 4 by 8 feet. Note that patio function has no outside key override, so confirm it suits the occupancy before putting it on a rated opening in a school or healthcare corridor.
6) What is the closest Grade 2 privacy knob lock to the BEST 6K patio function from another manufacturer?
The Dexter C2000 privacy ball knob lock is the nearest peer: it is a Grade 2 cylindrical knob lock with a Privacy/Bed/Bath function, non-keyed and non-clutching, for doors 1-3/8 inch to 1-3/4 inch thick. The BEST 6K patio function knob is also Grade 2 and non-keyed, and covers doors from 1 3/8 inch to 1 7/8 inch. If the door is thicker than 1-3/4 inch, the 6K is the one that still fits.
7) This is a high-traffic corridor door. Is there a heavier-duty knob than the BEST 6K?
Yes. For non-keyed openings, the Schlage D10S passage latch is a Grade 1 heavy duty cylindrical knob lock with the Orbit knob, the Corbin Russwin CK4310 Global knob passage lock is Grade 1 for doors 1-3/8 inch to 2 inch, and the Falcon X101 is a Grade 1 heavy duty cylindrical passage knobset with interchangeable core for 1-3/8 inch to 2-1/4 inch doors. The BEST 6K is Grade 2 medium duty. Note that all three of those are passage function, not the inside-locking patio function of the 6K.
8) The door needs a key from the outside. Which knob lock should I order instead of the BEST 6K patio function?
The 6K patio function is non-keyed, so for outside key control choose a keyed peer: the Sargent 6G04 is a Grade 2 storeroom/closet knob lock with a single cylinder, the Sargent 8XG04 is a Grade 1 heavy duty storeroom/closet knob lock with a 2-3/4 inch backset, the Corbin Russwin CK4851 is an entrance/office cylindrical knob lock with a conventional cylinder for 1-3/8 inch to 2 inch doors, and the Dexter C2000 entry/office ball knob is Grade 2 and keyed for 1-3/8 inch to 1-3/4 inch doors.
9) Which knob locks offer a 5 inch backset like the BEST 6K, for a narrow-stile or thick-rail door?
The BEST 6K patio function is offered in 2-3/8 inch, 2-3/4 inch, 3-3/4 inch and 5 inch backsets. Among the comparable knob locks, the stated backsets are fixed and shorter: the Falcon W101 passage knob and the Sargent 8XG04 storeroom knob are both 2-3/4 inch, and the Baldwin Estate 5000 privacy and passage knobs are 2-3/8 inch. If the door requires a 3-3/4 inch or 5 inch backset, the 6K is the one to specify.
10) Do I have to specify handing for the BEST 6K knob lock?
No. The 6K lockset is reversible for either hand of door, and the reversal is done without removing the knob. One part number covers left and right hand openings, which is worth knowing if you are stocking spares for a building with mixed swings.
11) Is the BEST 6K knob lock strong enough for a school or apartment building?
It is a medium duty, Grade 2 lockset certified to BHMA A156.2 Series 4000, with brass and bronze parts and corrosion-treated internal steel. That suits standard-traffic openings, resident units, offices and restrooms. For high-abuse doors seeing constant public use, step up to a Grade 1 cylindrical such as the Schlage D Series or the Falcon X Series.
12) Which rose size should I pick to cover the old holes on a retrofit?
Two rose diameters are offered: the standard 2-9/16 inch and a larger 3-3/8 inch. Go with the 3-3/8 inch rose when you are replacing a lock that had a bigger trim footprint or when the door face is marked or oversized around the bore, since the wider rose hides more. The inside rose snaps on with no exposed screws either way.
13) I ordered a patio knob but the door just needs to latch, no locking. What should I use instead?
Use a passage set, not patio. Passage latches without any locking button at all, which is what you want on halls, closets and corridor doors. Grade 2 passage knobs in the same class include the Corbin Russwin CK4410 for 1-3/8 to 1-3/4 inch doors, the Dexter C2000 passage ball knob, the Falcon W101 with a 2-3/4 inch backset, and the Arrow MK01. If the door only needs a pull and no latch, a dummy trim like the Schlage A170 is the right part.
14) Is the BEST 6K patio lock a direct swap for a Schlage A Series knob?
Both work off the same 2-1/8 inch cylindrical bore, and the 6K covers 1-3/8 to 1-7/8 inch doors, the same thickness range listed for the Schlage A Series A170 trim. So the door prep lines up. Match the backset to the existing bore and pick the strike option that matches your jamb cutout, and check the rose diameter covers whatever the old trim left behind.
15) My building is standardized on BEST interchangeable cores. Does the patio 6K fit that program?
The 6K Series is built around the BEST interchangeable core so cores can be swapped for rekeying without pulling the lockset off the door. The patio version itself is non-keyed, so it carries no core. Keep it on the occupant-controlled doors and use keyed 6K functions on the openings that need to sit in your core program.
16) I need a bed and bath knob for a residential remodel, not a commercial patio lock. What else works?
For residential-look privacy openings, the Pamex FTF Baron knob lockset in privacy function is Grade 3 for doors 1-3/8 inch to 1-3/4 inch, the Cal-Royal BER20 privacy knob with brass trim is Grade 3 for the same thickness range, and the Deltana 6112 St. Thomas privacy knob covers 1-3/8 inch to 2 inch doors. The BEST 6K patio function knob is Grade 2, medium duty, commercial-rated, and takes the BEST interchangeable core platform.
17) Can a Schlage A170 dummy knob be used in place of the BEST 6K patio knob?
No. The Schlage A170 is a single dummy trim, a Grade 2 non-keyed knob for doors 1-3/8 inch to 1-7/8 inch, and it has no latch at all - it is surface-mounted trim for a door that does not latch. The BEST 6K patio function includes a 1/2 inch throw deadlocking latch with a 2-3/4 inch by 1-1/8 inch curved lip strike. The Bravura Biloxi and Omnia 434/0 are likewise dummy knobs and will not latch a door.
18) What is a lower-grade knob option than the BEST 6K for light-use interior doors?
Grade 3 knob locksets in the same cylindrical family include the Pamex FT3 Saturn knob for 1-3/8 inch to 1-3/4 inch doors, the Pamex FTF Baron in passage function, the Cal-Royal BER00 entrance/office knob with a Kwikset keyway, and the Callan Canova and Santo entrance knobsets. The BEST 6K is Grade 2 and meets BHMA A156.2 Series 4000 with UL listing for 3-hour A label single doors up to 4 feet by 8 feet, which matters where a fire-rated opening is involved.
19) What finishes does the BEST 6K patio knob come in, and can I match 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. For most commercial buildings 626 satin chrome or 626-equivalent brushed hardware is what is already hanging, so match by the BHMA number stamped on your existing trim rather than by eye.
20) Is a keyless combination knob like the Lockey 3830 an alternative to the BEST 6K patio knob?
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 thick, so access is by code rather than by a thumbturn or key. The BEST 6K patio function is a non-keyed Grade 2 cylindrical knob locked from inside the room, with a 1/2 inch throw deadlocking latch. Choose the 3830 when you want coded entry from outside; choose the 6K when the occupant simply needs to secure the room from within.
How fast can I get the BEST 6K30P4CSTK626 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 6K30P4CSTK626 come with a warranty?
Absolutely. The BEST 6K30P4CSTK626 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 6K30P4CSTK626?
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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