BEST 9K Series Grade 1 Corrido...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,076.00
$666.67
BEST BEST 9K Corridor (C) Lock - Grade 1 Cylindrical Keyed Lever Lock BES-9K-C-KEYED

BEST 9K Series Grade 1 Corridor Cylindrical Lever Lock with Keyed Function

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Model: 9K37C14CSTK626
$1,076.00
$666.67
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,076.00
$666.67
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BEST 9K Series Grade 1 Corridor Cylindrical Lever Lock with Keyed Function

Premium Commercial-Grade Security Solution

The BEST 9K Series Corridor (C) Lock delivers professional-grade security with Grade 1 BHMA certification and heavy-duty construction. This cylindrical lever lock features a 2-3/4" backset, 9/16" latch throw, and accommodates door thicknesses from 1-3/4" to 2-1/4". Built with critical brass and corrosion-treated steel components, the 9K series combines exceptional craftsmanship with innovative design for demanding commercial applications.

Professional Features & Benefits

  • Door Compatibility: Designed for 1-3/4" to 2-1/4" door thickness with 2-3/4" standard backset for versatile installation options.
  • Heavy-Duty Construction: Critical latch and chassis components are brass or corrosion-treated steel with zinc hubs and hardened steel alloy sleeve for maximum durability.
  • Grade 1 Performance: BHMA A156.2 Series 4000 Grade 1 certification ensures superior performance in high-traffic commercial applications.
  • Attack-Resistant Design: Rose locking pin assembly and slotted key release cam provide exceptional torque resistance and prevent damage under attack conditions.
  • Smooth Operation: Hub-mounted torsion spring and strong retractor springs prevent lever sag while delivering smooth, snappy operation throughout the lock’s service life.
  • Fire Rating Compliance: UL listed for use on 3-hour A label doors for single or double swinging door applications.
  • Interchangeable Core Ready: Allows for quick re-keying and customized master keying systems for enhanced security management.
  • Manufacturer Warranty: 10 Year Limited warranty provides added confidence and long-term protection for commercial installations.

Technical Specifications

  • ANSI/BHMA: F88
  • Backset (Distance): 2-3/4"
  • Commercial/Residential: Commercial
  • Department: Door Hardware
  • Door Hand Direction: Non-Handed
  • Duty Level: Heavy Duty
  • Electronic: No
  • Function Description: Latch operated by: Rotating the inside lever/ outside lever (when not locked by key), Turning the key in the outside lever. Inside lever is always unlocked and cannot be locked.
  • Grade: Grade 1
  • Handle Type: Lever
  • Keyed: Yes
  • Keyed Function: Double Cylinder
  • Lock Function: Corridor/Dormitory
  • Lock Type: Cylindrical
  • Product Attribute: Cylindrical Locks
  • Product Category: Mechanical Locks
  • Product Function: Corridor/Dormitory
  • Product Group: Mechanical Locks
  • Product Model: C
  • Product Subgroup: Bored Locksets
  • Product Substrate: Corrosion-Treated Steel
  • Product Type: Leversets
  • Series: 9K Series
  • Standard Latch: 9/16" Throw
  • Standard Strike: 2-3/4 x 1-1/8" with curved lip and box
  • Subcategory: Cylindrical Locks
  • Warranty: 10 Year Limited

Installation & Operation

  1. Review manufacturer specifications and verify door preparation requirements including door thickness (1-3/4" to 2-1/4"), backset (2-3/4" standard), and handing as applicable to this product.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces, including two additional 5/16" diameter through-bolt holes at 12 o’clock and 6 o’clock positions.
  3. Prepare door and frame by drilling required holes and routing as specified in manufacturer instructions, conforming to ANSI A115.2 standards.
  4. Install all mounting hardware including through-bolts and secure the device to door and frame per manufacturer torque specifications.
  5. Adjust operational components for proper alignment, latching, and smooth operation throughout the full range of motion.
  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

Anti-Microbial Option

The BEST UltraShield antimicrobial protected coating (finish 626AM) is available for applications where product cleanliness is a high priority, including healthcare, elderly care, education, transportation, food service, and hospitality environments. This finish inhibits the growth of bacteria and other microbes on the hardware surface.

Why Choose BEST Quality?

BEST 9K Series cylindrical locks deliver professional-grade reliability with brass and corrosion-treated steel construction rated for Grade 1 heavy-duty performance. The innovative attack-resistant design and 10 Year Limited warranty provide exceptional value for demanding commercial applications. Engineered with premium materials and exceptional craftsmanship, the 9K series offers the dependable security solution that building professionals trust.

Product Specs

Series:
9K Series
Subcategory:
Cylindrical Locks
Grade:
Grade 1
Duty Level:
Heavy Duty
Handle Type:
Lever
Keyed Function:
Double Cylinder
Warranty:
10 Year Limited
Standard Latch:
9/16" Throw
Standard Strike:
2-3/4 x 1-1/8" with curved lip and box
ANSI/BHMA:
F88
Product Group:
Mechanical Locks
Product Subgroup:
Bored Locksets
Product Type:
Leversets
Keyed:
Yes
Electronic:
No
Commercial/Residential:
Commercial
Function Description:
Latch operated by: Rotating the inside lever/ outside lever (when not locked by key), Turning the key in the outside lever. Inside lever is always unlocked and cannot be locked.
Lock Type:
Cylindrical
Lock Function:
Corridor/Dormitory
Product Attribute:
Cylindrical Locks
Product Model:
C
Product Function:
Corridor/Dormitory
Door Hand Direction:
Non-Handed
Product Category:
Mechanical Locks
Product Substrate:
Corrosion-Treated Steel
Backset (Distance):
2-3/4"
Department:
Door Hardware

BEST 9K37C14CSTK626 – Frequently Asked Questions

1) How does the BEST 9K corridor (C) function actually work on a dorm or corridor door?
The latch retracts by rotating the inside lever at all times, and by the outside lever whenever it is not locked by key. Turning the key in the outside lever locks or unlocks that outside lever. The inside lever is always free and cannot be locked, so anyone inside gets out without a key. That is the behavior you want on dormitory rooms, corridor doors, and multi-tenant unit entries where egress must stay unrestricted.
2) Will the BEST 9K lever lock fit my existing 2-3/4 inch backset door prep?
Yes. The 9K corridor lock is a cylindrical bored lockset with a 2-3/4 inch standard backset, which is the usual commercial bore. It is also built in 3-3/4 inch and 5 inch backsets for doors with wider stiles or glass lites, so you order the backset that matches the hole already in the door.
3) What door thickness does the BEST 9K cylindrical lock handle?
It covers 1-3/4 inch through 2-1/4 inch doors. Standard 1-3/4 inch commercial doors are the middle of that range, and the extra reach handles thicker doors without a spindle kit. Anything thinner than 1-3/4 inch is outside the range.
4) Will the BEST 9K latch into a strike I already have in the frame?
The standard latch throws 9/16 inch and the standard strike is a 2-3/4 x 1-1/8 inch curved lip strike with a box. You can also order it with the S3 4-7/8 inch ANSI strike or the STK 2-3/4 inch ANSI strike. If your frame is already prepped for a 4-7/8 inch ANSI strike, order S3 and no frame work is needed.
5) Is the BEST 9K corridor lock fire rated and Grade 1?
It is BHMA A156.2 Series 4000 Grade 1, heavy duty, and UL listed for 3-hour A label doors on single or swinging pairs. The ANSI function designation is F88. Those are the numbers a spec writer or facility inspector will ask for on a corridor or stair door.
6) Can the BEST 9K be keyed into our existing master key system?
It is interchangeable core ready, so it takes an IC core and can be pulled and re-keyed with a control key rather than disassembling the lock. That is the whole reason facilities standardize on BEST: one core format across the building, and masterkeying changes handled at the core instead of at the lockset.
7) What is a Grade 1 cylindrical lever alternative to the BEST 9K corridor lock if the opening only needs a storeroom function?
For a storeroom opening where the outside lever stays locked at all times and the key retracts the latch, the Cal-Royal AG05 is a storeroom-function lever lockset with a deadlocking latchbolt, listed at Grade 2 for doors 1-3/8 inch to 1-3/4 inch thick. The BEST 9K C corridor lock is a different function: its inside lever is always unlocked and cannot be locked, and the outside lever is released by key. If you need the Grade 1 rating on a storeroom door, the AG05 will not match on grade, so specify the corresponding storeroom function within the BEST 9K family instead.
8) What Grade 1 lever lock should I use on the non-keyed doors in the same corridor as the BEST 9K C locks?
For the passage openings alongside keyed corridor doors, the Falcon K101 is a Grade 1 heavy duty passage cylindrical lock with non-handed levers, fire rated, for doors 1-3/8 inch to 2-1/4 inch thick. The Falcon T101 is another Grade 1 heavy duty passage lever, and the Corbin Russwin CL3110 is a Grade 1 vandal resistant passage/closet lever for 1-3/4 inch to 2 inch doors. All three drop the cylinder entirely, so there is no key control on those doors; the BEST 9K C keeps a keyed outside lever and carries Grade 1 with a 1-3/4 inch to 2-1/4 inch door thickness range.
9) Which Grade 1 lever lock should I use instead of the BEST 9K C on a classroom door?
Classroom openings need a different function than corridor. The Dexter C1000 is offered as a Grade 1 classroom cylindrical lever lock with clutching, keyed, for doors 1-3/8 inch to 1-3/4 inch thick, and as a Grade 1 classroom security version. Cal-Royal also lists an AG03 classroom lever. The BEST 9K C is a corridor/dormitory function where the inside lever cannot be locked, so it will not give a teacher the ability to secure the outside lever by key from inside.
10) For a patient room or behavioral health door, what takes the place of the BEST 9K C corridor lock?
Asylum or institution function is the one to specify there. The Dexter C1000 is available as a Grade 1 asylum lock carrying the F87 designation for doors 1-3/8 inch to 2 inch thick, and the Arrow MK33-BD-CS is a heavy duty asylum/institution/utility cylindrical lock with a ball knob and a conventional cylinder in Schlage C keyway. The BEST 9K C is an F88 corridor lock whose inside lever is always free, which is the opposite of what an asylum opening requires. Note the Arrow is a knob rather than a lever, which matters if the facility is standardizing on ADA-friendly lever trim.
11) Do I need to specify handing for the BEST 9K lever lock?
No. The 9K corridor lock is non-handed, so one lock covers left and right hand doors. That is what makes it easy to stock as a fleet item across a building without sorting by handing.
12) What lever, rose, and finish choices do I pick when ordering the BEST 9K?
Four things to specify besides backset and strike. Lever: 15 Lever, Curved with Return, or Curved without Return. Rose: C rose at 3 inch convex or D rose at 3-1/2 inch convex. Finish: 605 bright brass, 606 satin brass, 611 bright bronze, 612 satin bronze, 613 oil-rubbed satin bronze, 618 bright nickel, 619 satin nickel, 622 matte black, 625 bright chrome, 626 satin chrome, 626AM satin chrome antimicrobial, and 690 statuary dark bronze. The larger D rose is the one to pick when you are covering up prep scars from an older lock.
13) Which finish should I use on healthcare or food service doors?
626AM, satin chrome with the BEST UltraShield antimicrobial coating. It inhibits growth of bacteria and other microbes on the hardware surface and is intended for healthcare, elderly care, education, transportation, food service, and hospitality. It matches standard 626 satin chrome visually, so you can mix it into a building already standardized on 626.
14) What does the door prep for a BEST 9K involve beyond the standard bore?
Prep follows ANSI A115.2, and on top of the standard cylindrical bore you drill two extra 5/16 inch diameter through-bolt holes at the 12 o'clock and 6 o'clock positions. Those through-bolts are what hold the chassis against the abuse a corridor door takes, so do not skip them on a retrofit into an existing bore.
15) Is the BEST 9K corridor lock durable enough for high-traffic apartment and school doors?
Critical latch and chassis parts are brass or corrosion-treated steel, with zinc hubs and a hardened steel alloy sleeve. A rose locking pin assembly and slotted key release cam resist torque attack, and a hub-mounted torsion spring with strong retractor springs keeps the lever from sagging over time. Lever sag is the usual failure on cheaper cylindrical locks in dorms and multi-family corridors.
16) What Grade 1 cylindrical lever alternatives are there if I do not want a BEST interchangeable core?
Two straightforward Grade 1 cylindrical options from other brands: the Corbin Russwin CL3100 Series vandal resistant lever, which is fire rated and covers 1-3/4 to 2 inch doors, and the Dexter C1000 Series, which comes in Classroom, Classroom Security, and Asylum keyed functions. Note neither is a corridor function match, so if you specifically need inside lever always free with key control outside, stay with the 9K C function.
17) I need an access-controlled version of the corridor door instead of the keyed BEST 9K C. What are my options?
For an electrified cylindrical lever on a Grade 1 opening, the Corbin Russwin CL33903 is a fail safe lever rated Grade 1 for doors 1-3/4 inch to 2 inch thick, offered in 12VAC/DC. For standalone keypad access without wiring, the Delaney LP250 is a Grade 2 electronic keypad leverlock and the Lockey 2835DC is a mechanical keyless lever lock with double combination for doors 1-3/16 inch to 2 inch thick. The BEST 9K C is a mechanical, non-electronic lock, so any of these changes how the door is credentialed and what power or prep the frame needs.
18) Can I put a Baldwin Estate 5103 or Emtek lever on the same corridor doors as the BEST 9K C for a consistent look?
Those are different classes of product. The Baldwin Estate 5103 is offered in passage, privacy, and left- and right-hand half dummy versions on a 5048 rose, and the Emtek Arts and Crafts and Cortina leversets in the dummy configurations are pairs with no latch at all. None of them provide a keyed corridor function. The BEST 9K C is a keyed Grade 1 cylindrical lock with a 9/16 inch throw latch and a 2-3/4 x 1-1/8 inch curved lip strike, and it is non-handed. If you want visual consistency on the secured doors, work within the 9K lever and rose choices rather than substituting a decorative trim set.
19) My apartment doors are 1-3/8 inch thick. Will the BEST 9K C fit, and what fits if it does not?
The BEST 9K C is built for doors 1-3/4 inch to 2-1/4 inch thick, so a 1-3/8 inch door is below its range. For thinner leaves, the Hager 2510 passage lever covers 1-3/8 inch to 2 inch, the Falcon K101 Grade 1 passage lock covers 1-3/8 inch to 2-1/4 inch, and the Cal-Royal AG00 entrance lever with a 6-pin Schlage C keyway and 2-3/8 inch backset covers 1-3/8 inch to 1-3/4 inch. Those are different functions than corridor, so confirm the door's required operation before swapping.
20) Is a Grade 2 or Grade 3 lever like the Falcon B511 or Cal-Royal AUS00 enough for a hotel corridor instead of the BEST 9K C?
It depends on the traffic the opening sees and what the spec requires. The Falcon B511CP6D is a Grade 2 medium duty cylindrical lever with entry/office function, and the Cal-Royal AUS00 is a Grade 3 entrance/office lever with a solid brass forged body for doors 1-3/8 inch to 1-3/4 inch. The BEST 9K C is Grade 1 heavy duty, UL listed for 3-hour A label doors, and corridor/dormitory function where the inside lever cannot be locked. On a rated corridor or a high-cycle opening, the grade and fire listing are the deciding factors, not the trim.
21) Does the Accentra 107S Schlage cylinder adapter work with the BEST 9K C lock?
No. The Accentra 107S is a Schlage cylinder adapter kit made for Yale hardware, so it addresses cylinder compatibility on a different manufacturer's chassis. The BEST 9K C is built to take an interchangeable core for quick re-keying and master keying, which is a separate cylinder system. Order the core and keyway for the 9K through the BEST interchangeable core program rather than an adapter.
22) I need matching passage levers for the non-keyed doors on the same job. What pairs with a Grade 1 cylindrical lockset?
For non-keyed openings alongside keyed corridor doors, Grade 1 cylindrical passage options include the Falcon K Series K101, which is heavy duty, fire rated, and covers 1-3/8 to 2-1/4 inch doors, the Falcon T Series T101 heavy duty passage lever, and the Design Hardware X Series X75 for 1-3/4 inch doors. If the door is low traffic and does not need Grade 1, the Hager 2510 is a Grade 2 passage lever for 1-3/8 to 2 inch doors.
23) Does the BEST 9K corridor lock need power or wiring?
No. It is a fully mechanical cylindrical lockset, not electronic, so there is nothing to wire and no power transfer hinge or door loop required. If you need an electrified lever on the same opening, that is a different product family, such as the Corbin Russwin CL33900 Series fail safe electrified lever in 12VAC/DC.
24) What matches the BEST 9K C on a closet or door that only needs a pull, with no latching?
For a door that needs trim only, the Accentra 455LN Augusta is a Grade 1 single dummy cylindrical lever, the Callan Bentley BN5051 is a Grade 2 dummy lever, and the Emtek Arts and Crafts and Hammered leversets are offered as dummy pairs. None of these operate a latch. The BEST 9K C is a keyed Grade 1 cylindrical lock with a live latch and a 2-3/4 x 1-1/8 inch strike, so pair a dummy only on leaves that do not need to latch, such as the inactive half of a pair.
How fast can I get the BEST 9K37C14CSTK626 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 9K37C14CSTK626 come with a warranty?
Absolutely. The BEST 9K37C14CSTK626 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 9K37C14CSTK626?
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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