BEST 9K Series Classroom Funct...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$983.00
$609.44
BEST BEST 9K Classroom (R) Lock - Grade 1 Cylindrical Keyed Lever Lock BES-9K-R-KEYED

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

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Model: 9K37R14CSTK626
$983.00
$609.44
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$983.00
$609.44
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BEST 9K Series Classroom Function Grade 1 Cylindrical Lever Lock with Keyed Entry

Premium Commercial-Grade Security Solution

The BEST 9K Series Classroom Function cylindrical lock delivers professional-grade security with Grade 1 BHMA certification for demanding commercial applications. This heavy-duty 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 corrosion-treated steel chassis and brass components, the 9K series combines exceptional craftsmanship with innovative design for maximum attack resistance and long-lasting performance.

Professional Features & Benefits

  • Grade 1 BHMA Certification: Listed by BHMA for A156.2, Series 4000, Grade 1 providing the highest level of commercial security performance.
  • Heavy-Duty Construction: Critical latch and chassis components are brass or corrosion-treated steel with zinc hubs and hardened steel alloy outer sleeve for maximum durability.
  • Attack-Resistant Design: Rose locking pin and assembly design offers exceptional torque resistance, preventing twisting, bending, or breaking under attack while maintaining key access even when damaged.
  • Classroom Function Operation: Outside lever locks and unlocks by turning key in outside lever, inside lever always unlocked and cannot be locked, ideal for educational facility security requirements.
  • Fire Rating Compliance: Listed by Underwriters Laboratories for use on 3-hour A label doors for single or double swinging applications.
  • Interchangeable Core System: Allows for quick re-keying and customized master keying for flexible access control management.
  • Anti-Microbial Option Available: UltraShield™ antimicrobial protected coating inhibits growth of bacteria and microbes on hardware surface for healthcare and high-cleanliness applications.
  • 10 Year Limited Warranty: Comprehensive manufacturer warranty provides long-term protection and confidence in professional installations.

Technical Specifications

  • ANSI/BHMA: F84
  • Backset (Distance): 2-3/4"
  • Commercial/Residential: Commercial
  • Department: Door Hardware
  • Door Hand Direction: Non-Handed
  • Duty Level: Heavy Duty
  • Electronic: No
  • Function Description: Turning the key in the outside lever, Rotating the inside lever/ Rotating the outside lever when not locked by key. Outside lever is locked and unlocked by turning the key in the outside lever. Inside Lever is always unlocked and it Cannot be locked.
  • Grade: Grade 1
  • Handle Type: Lever
  • Keyed: Yes
  • Keyed Function: Single Cylinder
  • Lock Function: Classroom
  • Lock Type: Cylindrical
  • Product Attribute: Cylindrical Locks
  • Product Category: Mechanical Locks
  • Product Function: Classroom
  • Product Group: Mechanical Locks
  • Product Model: R
  • 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 from 1-3/4" to 2-1/4", 2-3/4" backset, and non-handed operation compatibility.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately including standard ANSI A115.2 preparation plus two additional 5/16" diameter through-bolt holes at 12 o'clock and 6 o'clock positions.
  3. Prepare door by drilling required holes including 2-1/8" diameter chassis hole and routing as specified in manufacturer instructions.
  4. Install all mounting hardware including through-bolts and secure the device to door per manufacturer torque specifications for maximum attack resistance.
  5. Adjust operational components for proper alignment, 9/16" latch throw engagement, and smooth lever operation throughout the full range of motion.
  6. Test device operation to verify proper classroom function including key locking/unlocking of outside lever and always-free inside lever operation. Refer to manufacturer documentation for complete installation details and troubleshooting.

Professional Applications

  • Educational Facilities and Classrooms
  • Commercial Office Buildings
  • Healthcare Institutions
  • Government and Municipal Buildings
  • Multi-Tenant Residential Properties
  • Industrial and Warehouse Facilities
  • Retail Establishments

Anti-Microbial Option

BEST UltraShield™ antimicrobial protected coating is available as finish option 626AM, providing satin chrome plating with antimicrobial protection that inhibits the growth of bacteria and other microbes on the hardware surface. This option is recommended for healthcare, elderly care, education, transportation, food service, and hospitality applications where product cleanliness is a high priority.

Why Choose BEST Quality?

BEST 9K Series cylindrical locks deliver professional-grade reliability with Grade 1 BHMA certification and corrosion-treated steel construction rated for heavy-duty commercial applications. The 10 Year Limited Warranty and UL listing for 3-hour fire doors demonstrate BEST's commitment to quality and performance. Engineered for demanding commercial applications where dependable security and long-term durability are essential.

Product Specs

Series:
9K Series
Grade:
Grade 1
Duty Level:
Heavy Duty
Handle Type:
Lever
Keyed Function:
Single 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:
F84
Product Group:
Mechanical Locks
Product Subgroup:
Bored Locksets
Product Type:
Leversets
Subcategory:
Cylindrical Locks
Keyed:
Yes
Electronic:
No
Commercial/Residential:
Commercial
Function Description:
Turning the key in the outside lever, Rotating the inside lever/ Rotating the outside lever when not locked by key. Outside lever is locked and unlocked by turning the key in the outside lever. Inside Lever is always unlocked and it Cannot be locked.
Lock Type:
Cylindrical
Lock Function:
Classroom
Product Attribute:
Cylindrical Locks
Product Model:
R
Product Function:
Classroom
Door Hand Direction:
Non-Handed
Product Category:
Mechanical Locks
Product Substrate:
Corrosion-Treated Steel
Backset (Distance):
2-3/4"
Department:
Door Hardware

BEST 9K37R14CSTK626 – Frequently Asked Questions

1) What does classroom function mean on a BEST 9K lever lock, and can a teacher lock the door from inside?
No, the inside lever cannot be locked. On the 9K classroom function the outside lever is locked and unlocked only by turning the key in the outside lever, and the inside lever is always free for egress. That means the door has to be locked from the corridor side with a key. If your district wants staff to be able to lock down from inside the room, classroom function is the wrong choice, and something like a classroom security function is what to look at instead.
2) Will a BEST 9K lever latch into the strike already in my frame?
The 9K ships with a 9/16 inch throw latch and a standard 2-3/4 x 1-1/8 inch strike with a curved lip and box. If your frame carries that same ANSI-size strike, the latch drops in. Two strike choices are offered when ordering: the STK 2-3/4 inch ANSI strike and the S3 4-7/8 inch ANSI strike for hollow metal frames prepped to the taller cutout. Measure the existing strike plate before you pick, since the two are not interchangeable in the same frame prep.
3) Do I need to order a left hand or right hand BEST 9K classroom lock?
Handing is not a factor. The 9K cylindrical lever is non-handed, so one part number works on a left or right hand door and you can stock a single lock for a whole building. That also means a mis-swing in the field does not send the lock back.
4) What backset do I order for a BEST 9K classroom lever on a wide stile or unusual door?
Three backsets are available: 2-3/4 inches as standard, plus 3-3/4 inches and 5 inches for doors bored further off the edge. The 2-3/4 inch is the normal commercial dimension and is what the base spec calls out; the longer two are for wide stile aluminum or specialty prep. Measure from the door edge to the center of the 2-1/8 inch chassis bore and order to that number.
5) Can I use a BEST 9K classroom lock on a fire rated door?
Yes. The 9K is listed by Underwriters Laboratories for use on 3-hour A label doors, single or swinging pairs, and it carries the ANSI/BHMA A156.2 Series 4000 Grade 1 listing under function code F84. That combination is what a spec on an institutional or healthcare corridor door normally calls for.
6) Does the BEST 9K lever take an interchangeable core, and does it need extra door prep?
The 9K uses BEST's interchangeable core system, so a locksmith can pull and swap cores for rekeying or master keying without taking the lock off the door. Prep is standard ANSI A115.2 plus two extra 5/16 inch diameter through-bolt holes at the 12 and 6 o'clock positions, which is what gives the rose its torque resistance. If your doors are already prepped A115.2 for another brand, you will still need those two through-bolt holes drilled.
7) What else could I buy instead of a BEST 9K classroom lever lock?
The closest cross-brand equivalent ZenSupply carries is the Dexter C1000 Series Grade 1 classroom cylindrical lever, a clutching keyed lock for 1-3/8 to 1-3/4 inch doors. Note that thickness range: it stops at 1-3/4 inches where the 9K goes to 2-1/4, so on thick doors the 9K is the one that fits. On a lighter-traffic opening the Cal-Royal AG03 classroom lever is a Grade 2 alternative with a 2-3/4 inch backset and a 6-pin Schlage C keyway. What the Dexter and Cal-Royal do not give you is BEST's interchangeable core, so if your facility is already keyed on BEST cores, stay with the 9K.
8) What is the closest Grade 1 classroom function lever lock to the BEST 9K R if the door is only 1-3/8 inch thick?
The Dexter C1000 Series Grade 1 Classroom cylindrical lever lock covers a door thickness range of 1-3/8 inch to 1-3/4 inch, so it suits thinner doors than the BEST 9K R, which is built for 1-3/4 inch to 2-1/4 inch doors. Both are Grade 1 keyed classroom function cylindrical levers. The Dexter uses a clutching lever design and a keyed cylinder; the BEST 9K R locks and unlocks the outside lever by turning the key in the outside lever, with the inside lever always free.
9) What should I use instead of a classroom lock on a door that has to stay locked from the outside at all times but always exit freely?
That is storeroom function, not classroom. The Cal-Royal AG05 is a Grade 2 storeroom lever lockset with a deadlocking latchbolt, and the Hager 2580 is a Grade 2 storeroom cylindrical lock with the Withnell lever for doors 1-3/8 inch to 2 inch thick. The BEST 9K R is classroom function: the outside lever is locked and unlocked only by turning the key in the outside lever, so it can be left unlocked, which is not what a storeroom opening calls for.
10) Which finish and lever style should I specify to match the rest of my building's BEST 9K locks?
Twelve finishes are offered, from 605 bright brass and 606 satin brass through 613 satin bronze oil-rubbed, 619 satin nickel, 622 matte black, 625 bright chrome, 626 satin chrome and 690 statuary dark bronze, plus 611 bright bronze, 612 satin bronze and 618 bright nickel. Lever style comes in contour with angle return, curved with return, or curved without return, and the rose is either a 3 inch C convex or a 3-1/2 inch D convex. Pull the finish code and lever letter off an existing lock in the building and order to match; the rose diameter is the one that shows if you get it wrong on a door already bored for the larger plate.
11) Is there an antimicrobial version of the BEST 9K lever for a hospital or care facility?
Yes, finish 626AM. That is satin chrome plating with BEST's UltraShield antimicrobial coating, which inhibits bacteria and microbe growth on the hardware surface. It is the option to specify for healthcare, elderly care, food service and hospitality corridors where surface cleanliness is part of the spec. Everything else about the lock is unchanged, so it carries the same Grade 1 chassis and classroom function.
12) Is a Grade 1 lock like the BEST 9K worth it over a Grade 2 lever for a school corridor?
For a corridor or classroom door in daily student traffic, yes. Grade 1 under ANSI/BHMA A156.2 is the heavy duty commercial tier, and the 9K backs it with a corrosion-treated steel chassis, brass latch components, zinc hubs and a hardened steel alloy outer sleeve, plus a rose locking pin that resists twisting attacks and keeps key access even if the lever is damaged. Grade 2 levers such as the Hager 2580 storeroom or the Falcon B511CP6D entry/office are medium duty and make sense on offices, storage and back-of-house doors where the cycle count and the abuse are lower.
13) Does the BEST 9K classroom lock need power or wiring run to the door?
No wiring. The 9K classroom lever is a purely mechanical, single-cylinder keyed lock with no electronic components, so there is no transfer hinge, no power supply and no fail-safe or fail-secure decision to make. If the job actually calls for an electrified lever tied to an access control system, that is a different product, for example the Corbin Russwin CL33903 Grade 1 fail safe electrified cylindrical lever running on 12VAC/DC.
14) For the non-keyed doors in the same corridor, what matches the BEST 9K R in grade without the cylinder?
Two Grade 1 passage cylindrical levers pair with a keyed classroom opening. The Falcon K101 is a Grade 1 heavy duty non-handed passage lock, fire rated, for doors 1-3/8 inch to 2-1/4 inch, and the Corbin Russwin CL3110 is a Grade 1 vandal resistant passage/closet lever, fire rated, for doors 1-3/4 inch to 2 inch. The BEST 9K R is the keyed Grade 1 heavy duty classroom member and is also non-handed.
15) Can a Falcon T101 or B101 lever be used in place of a BEST 9K classroom lock?
No. The Falcon T101 is a Grade 1 heavy duty passage lever and the Falcon B101 is a Grade 2 medium duty passage lever; both are passage function, meaning the lever always retracts the latch and there is no key control. The BEST 9K R is a keyed single cylinder classroom lock where the outside lever is locked and unlocked by the key. They share the cylindrical lever format, which is why they look interchangeable, but only the 9K R gives you key control of the corridor side.
16) What is the difference between an entry/office lever and the BEST 9K classroom lever for a school office door?
An office door is usually entry/office function, where the occupant can secure the door from inside. The Dexter C1000 Grade 1 Entry/Office cylindrical lever, clutching and keyed, covers doors 1-3/8 inch to 1-3/4 inch; the Hager 2525 is a Grade 2 commercial entry lever for 1-3/8 inch to 2 inch doors. The BEST 9K R classroom function has an inside lever that is always unlocked and cannot be locked, so the room cannot be secured from within.
17) Is there a keyless alternative to a keyed classroom lever for a room that only a few staff enter?
Mechanical keypad leversets remove the key from the equation. The Lockey 1150 heavy duty mechanical keypad lever set with double combination is a passage function keyless lock for doors 1-1/8 inch to 2 inch, and the Lockey 2835DC is a double combination mechanical keyless lever lock, also passage function, for doors 1 3/16 inch to 2 inch. Neither carries a cylinder, so they do not join a master key system the way the BEST 9K R does with its interchangeable core.
18) If the door needs to release on a fire alarm or card reader signal, what replaces a mechanical classroom lock?
An electrified cylindrical lever is the swap. The Corbin Russwin CL33903 is a Grade 1 fail safe electrified cylindrical lever lock running on 12VAC/DC for doors 1-3/4 inch to 2 inch, available with the NZ lever and D rose. The BEST 9K R is a mechanical lock with no electronic operation, so access control has to come from the key side.
19) Can a Baldwin Estate 5103 or Kwikset Breton lever be used on a school corridor door instead of a BEST 9K?
They are built for different traffic. The Baldwin Estate 5103 comes as passage, privacy, and half dummy levers with the 5048 rose, and the Kwikset 200BRNL Breton is a Grade 3 passage lever for doors 1-3/8 inch to 1-3/4 inch. The BEST 9K R is a Grade 1 heavy duty commercial classroom lock with a corrosion-treated steel chassis, keyed on the outside lever.
20) What lock handles a utility or holding room where the lever must not be lockable from inside at all?
That is asylum function. The Dexter C1000 Series Grade 1 Asylum lock (F87) covers doors 1-3/8 inch to 2 inch, and the Arrow MK33-BD-CS is a heavy duty asylum lock with a ball knob and a conventional cylinder in Schlage C keyway. Asylum function keys both sides; the BEST 9K R keys only the outside lever and leaves the inside lever always free.
21) I need a dummy lever to match a keyed classroom lever on an inactive leaf - what pairs with the BEST 9K?
The Accentra 455LN Augusta is a heavy duty Grade 1 single dummy cylindrical lever from the 5400 Series, which keeps the dummy at the same grade as a Grade 1 keyed opening. The Callan Bentley BN5051 is a Grade 2 dummy lever. A dummy has no latch and no cylinder; the BEST 9K R is a keyed single cylinder lock with a 9/16 inch throw latch.
How fast can I get the BEST 9K37R14CSTK626 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 9K37R14CSTK626 come with a warranty?
Absolutely. The BEST 9K37R14CSTK626 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 9K37R14CSTK626?
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 9K37R14CSTK626 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.

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