BEST 6K Series Grade 2 Passage...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$218.00
$138.27
BEST BEST 6K Series - Passage (N) Function Grade 2 Non-Keyed Knob Locks BEST-6K-N

BEST 6K Series Grade 2 Passage Function Non-Keyed Cylindrical Knob Lock

(No reviews yet) Write a Review

Model: 6K30N4CSTK626
$218.00
$138.27
Selected Finish is
Selected Strike is

In Stock (leaves warehouse same day if ordered before 3pm ET)

$218.00
$138.27
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

BEST 6K Series Grade 2 Passage Function Non-Keyed Cylindrical Knob Lock

Professional Grade 2 Cylindrical Lock Solution

The BEST 6K Series Grade 2 cylindrical knob lock delivers reliable performance for standard traffic applications with passage function operation. This non-keyed knobset features a 2 1/16" diameter cylindrical case designed for 2 1/8" bore installation, with door thickness compatibility from 1 3/8" to 1 7/8". Built with brass and bronze component parts and internal steel mechanisms with corrosion treatment, this lockset exceeds ANSI Grade 2 standards and carries UL listing for 3-hour fire rating applications.

Professional Features & Benefits

  • Door Compatibility: Accommodates door thickness from 1 3/8" to 1 7/8" with 2 1/8" diameter bore for standard installation requirements.
  • Grade 2 Performance: Exceeds ANSI Grade 2 standards and BHMA A156.2 Series 4000 Grade 2 listing for reliable commercial performance.
  • Durable Construction: Brass and bronze component parts with internal steel mechanisms featuring corrosion treatment for long-term reliability.
  • Fire Rating Compliance: UL listed for use on 3-hour A label single doors (4' x 8') for code compliance applications.
  • Quick Rekeying System: BEST interchangeable core allows rapid rekeying without lockset removal for enhanced security management.
  • 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.
  • Multiple Backset Options: Available in 2 3/8", 2 3/4", 3 3/4", and 5" backsets (62K, 63K, 64K, 65K Series) for various door configurations.

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: Passage/Hall/Closet
  • 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 (1 3/8" to 1 7/8"), 2 1/8" diameter bore, and appropriate backset selection.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door surfaces for latch tube (1" or 7/8" diameter).
  3. Prepare door by drilling required 2 1/8" diameter bore for lock housing and latch tube holes as specified in manufacturer instructions.
  4. Install latch assembly and secure the cylindrical lock housing to door per manufacturer torque specifications with concealed mounting system.
  5. Adjust threaded outside rose for proper door thickness and verify snap-on inside rose is properly seated with no exposed mounting screws.
  6. Test lockset operation to verify proper function and smooth knob operation throughout the full range of motion. 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 internal steel mechanisms rated to exceed ANSI Grade 2 standards. UL listed for 3-hour fire rating applications with BHMA A156.2 Series 4000 Grade 2 certification for demanding commercial applications. Engineered for standard traffic applications where dependable passage function performance and quick rekeying capability are essential.

Manufacturer Resources

BEST Product Overview

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:
Passage/Hall/Closet
Product Category:
Mechanical Locks
Department:
Door Hardware

BEST 6K30N4CSTK626 – Frequently Asked Questions

1) Will the BEST 6K passage knob lock fit a 1-3/4 inch commercial door?
Yes. The 6K Series cylindrical knobset covers door thicknesses from 1-3/8 inches through 1-7/8 inches, so standard 1-3/4 inch commercial doors are in range, as are older 1-3/8 inch interior doors and thicker 1-7/8 inch leaves. Door prep is a 2-1/8 inch diameter bore for the lock case, with a 1 inch or 7/8 inch latch tube hole in the edge. The outside rose is threaded so it adjusts to the actual thickness, and the inside rose snaps on with no exposed screws.
2) Which backset do I order for a BEST 6K knob lock, and what do the 62K, 63K, 64K, 65K numbers mean?
Backset is an order choice on the 6K Series: 2-3/8 inches, 2-3/4 inches, 3-3/4 inches, or 5 inches. Those map to the 62K, 63K, 64K and 65K prefixes respectively. Most commercial hollow metal and wood openings are bored at 2-3/4 inches; 2-3/8 inches shows up on lighter or residential-style prep. The 3-3/4 and 5 inch backsets are for wide-stile or glass-front style doors where the knob has to sit further off the edge. Measure from the door edge to the center of the existing 2-1/8 inch bore before picking.
3) Can I use a passage knob lock on a fire-rated door?
The BEST 6K Series is UL listed for use on 3-hour A label single doors up to 4 feet by 8 feet, so it is acceptable on a rated opening within those limits. Keep in mind a passage function has no lock at all, both knobs always retract the latch, so it only suits a rated opening where latching, not locking, is what the code calls for. Pairs of doors and leaves larger than 4 x 8 fall outside that listing.
4) Will the BEST 6K latch work with the strike already in my frame?
The standard latch throws 1/2 inch and ships with a 2-3/4 inch by 1-1/8 inch curved lip strike, which is the common commercial frame prep. If your frame is prepped for an ANSI strike box instead, order the S3 ANSI strike option rather than the standard STK strike. With only a 1/2 inch throw, the strike lip and frame position need to be reasonably tight, a sloppy gap will leave the latch shy of full engagement.
5) Is a Grade 2 passage knob enough for a school or hospital corridor, or should I go Grade 1?
The 6K is a medium duty, Grade 2 lockset listed to BHMA A156.2 Series 4000. That is the right call for offices, closets, patient rooms and similar moderate traffic. For a high-abuse opening, a main corridor, gym or a door that gets kicked, step up to a Grade 1 passage knob such as the Schlage D10S or the Falcon X101, which is heavy duty and covers 1-3/8 to 2-1/4 inch doors. Corbin Russwin's CK4310 is another Grade 1 passage knob option, rated for 1-3/8 to 2 inch doors.
6) What is the closest equivalent to a BEST 6K passage knob from another brand?
For a like-for-like Grade 2 non-keyed passage knob, the Corbin Russwin CK4410 with the Global knob and the Dexter C2000 passage ball knob are the nearest matches, both Grade 2 passage function for 1-3/8 to 1-3/4 inch doors. Arrow's MK01 and RK01 are also Grade 2 passage knobs over the same thickness range. The difference to watch is the BEST 6K's door range runs to 1-7/8 inches and offers 3-3/4 and 5 inch backsets, which none of those peers list, so on a thick or wide-stile door the 6K is the one that fits.
7) Does the BEST 6K passage knob lock take a key or a core?
No. This is the passage, hall and closet function, non-keyed, so both knobs are always free and the latch retracts from either side. There is no cylinder and no core to key. If you need the door to lock, you want a different function in a keyed cylindrical knob, for example a Grade 2 storeroom knob like the Sargent 6G04 or an entrance/office function such as the Corbin Russwin CK4851 or Dexter C2000 entry knob. For a bathroom or bedroom, a privacy function like the Dexter C2000 privacy knob is the one to use.
8) What is a direct cross-brand equivalent to the BEST 6K passage knob lock in Grade 2?
The BEST 6K Series passage knob lock is a Grade 2, non-keyed cylindrical knobset with passage/hall/closet function. Close cross-brand counterparts at the same grade and function include the Corbin Russwin CK4410, a Grade 2 passage/closet cylindrical lock with a Global knob and a 1-3/8 inch to 1-3/4 inch door thickness range; the Falcon W101, 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, Grade 2 non-clutching for 1-3/8 inch to 1-3/4 inch doors; and the Arrow MK01 Grade 2 passage knob for 1-3/8 inch to 1-3/4 inch doors. The 6K accepts doors from 1 3/8 inch to 1 7/8 inch, which is the wider range of that group.
9) The BEST 6K passage lock has no lock button. What should I use on a restroom or bedroom door instead?
The BEST 6K Series in passage function is non-keyed and latches only, with no locking at the knob. For a door that needs privacy locking, use a privacy/bed/bath function knob instead: the Dexter C2000 privacy ball knob is Grade 2 non-keyed for 1-3/8 inch to 1-3/4 inch doors, the Cal-Royal BER20 is a Grade 3 privacy knob with brass trim for 1-3/8 inch to 1-3/4 inch doors, and the Pamex FTF Baron is offered in a Grade 3 privacy function for the same thickness range. For keyed control instead of privacy, the Corbin Russwin CK4851 is an entrance/office cylindrical knob lock with a conventional cylinder.
10) Is a dummy knob the same thing as the BEST 6K passage knob?
No. The BEST 6K Series passage knob is a working latchset - the knob retracts a latch with a 1/2 inch throw against a 2-3/4 inch by 1-1/8 inch curved lip strike. A dummy knob is fixed trim with no latch at all, used on inactive leaves and closet doors held by a magnet or roller catch. Products in that class include the Schlage A170 single dummy trim, a Grade 2 cylindrical non-keyed dummy for 1-3/8 inch to 1-7/8 inch doors, the Cal-Royal BA40 Barrington dummy knob for 1-3/8 inch to 1-3/4 inch doors, and the Bravura Biloxi Grade 2 dummy knobset. If the door has a bore and needs to latch, the dummy will not substitute.
11) Do I need to specify handing for a BEST 6K passage knob?
No handing to call out. The 6K lockset is reversible for either hand of the door and does not have to be taken apart to swap it, so one part number covers left and right hand openings. That makes it easier to stock a single SKU across a building.
12) What rose size should I pick on a BEST 6K knobset if I am covering up an old lock?
Three rose options are offered: the 2-9/16 inch standard, a larger 3-3/8 inch, and the K rose. The 3-3/8 inch is the one to use when you are replacing a lock that left a bigger footprint or some scarring around the bore and you want it hidden without refinishing the door. If the door face is clean, the 2-9/16 inch standard is the normal choice.
13) What is a lighter-grade passage knob alternative to the BEST 6K for interior residential doors?
The BEST 6K Series is specified as commercial, Grade 2, medium duty. Where the opening is a light-use interior door, lighter-duty passage knobs include the Pamex FTF Baron in Grade 3 passage function for 1-3/8 inch to 1-3/4 inch doors, the Kwikset 200P Polo passage knob supplied with a 6AL latch and RCS round corner strike, and the Bravura Albany or Lynchburg Grade 2 passage knobsets with round trim. Note that the 6K's standard strike is a 2-3/4 inch by 1-1/8 inch curved lip, while the Kwikset ships a round corner strike, so the existing frame prep decides which drops in.
14) Which passage knob handles a thicker door than the BEST 6K Series?
The BEST 6K Series covers door thickness from 1 3/8 inch to 1 7/8 inch. For thicker leaves, the Corbin Russwin CK4310 Grade 1 passage/closet knob lock is rated 1-3/8 inch to 2 inch, and the Falcon X101 Grade 1 passage knobset with interchangeable core is rated 1-3/8 inch to 2-1/4 inch. The Lockey 3830 keyless combination knob lock with auto-locking passage function covers 1 3/16 inch to 2 inch, though it adds a combination mechanism rather than plain passage latching.
15) I need a Grade 2 knob lock that locks a storeroom, not a passage knob. What takes the place of the BEST 6K there?
The BEST 6K Series in passage function is non-keyed and always free from both sides, so it will not secure a storeroom. For that opening, the Sargent 6G04 is a Grade 2 standard duty storeroom/closet knob lock with a single cylinder, and the Sargent 8XG04 is a Grade 1 heavy duty storeroom/closet single cylinder knob lock with a 2-3/4 inch backset. For a keyed office-type function, the Dexter C2000 entry/office ball knob is Grade 2 keyed for 1-3/8 inch to 1-3/4 inch doors.
16) Can I match the BEST 6K on a door that needs a 5 inch backset, or do I have to change brands?
The BEST 6K Series is offered in 2-3/8 inch, 2-3/4 inch, 3-3/4 inch and 5 inch backsets, so wide-stile and unusual preps stay within the series. Among comparable passage knobs, the Falcon W101 Grade 2 passage/closet knob lock is specified with a 2-3/4 inch backset, and the Baldwin Estate 5000 Baltimore passage knob is preconfigured with a 2-3/8 inch backset. If the drawing calls for 3-3/4 inch or 5 inch, the 6K backset range covers it directly.
17) Is a decorative brass passage knob like the Omnia or Baldwin a substitute for the BEST 6K on a commercial corridor?
They are different classes of hardware. The BEST 6K Series is a commercial Grade 2 cylindrical knobset, medium duty, with brass and bronze parts over internal steel mechanisms and UL listing for 3-hour A label single doors. The Omnia 434/PA egg-shaped knob latchset and the Baldwin Estate 5011 Colonial passage knob with 5058 rose are also passage function, but they are decorative solid brass residential-style latchsets. On a rated commercial opening the 6K is the one carrying the Grade 2 and fire listing; on a residential interior where appearance drives the choice, the Omnia and Baldwin trims are the ones to look at.
18) What finishes does the BEST 6K knob lock come in for matching existing hardware in a building?
Seven finishes across the 6K knobset: 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 corridors 626 satin chrome is the one already on the doors; 613 is the dark oil-rubbed look used in hospitality and multi-family. Those are BHMA finish codes, so they cross-match to other brands' hardware carrying the same number.
19) What is the BEST 6K knob lock made of, and will it hold up in a humid or coastal building?
Brass and bronze component parts with internal steel mechanisms that get a corrosion treatment. That combination is aimed at long service in normal commercial interior conditions. For a wash-down area or heavy chemical exposure the finish choice matters as much as the mechanism, satin chrome (626) is the more forgiving surface there than the brass finishes.
How fast can I get the BEST 6K30N4CSTK626 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 6K30N4CSTK626 come with a warranty?
Absolutely. The BEST 6K30N4CSTK626 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 6K30N4CSTK626?
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 BEST 6K30N4CSTK626 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
!