Name: BEST 9K Series Dormitory (T) Grade 1 Cylindrical Lever Lock with 2-3/4" Backset
Brand: BEST
SKU: 9K37T14CSTK626
Price: 620 USD
Availability: InStock

Product Overview
FAQs

BEST 9K Series Dormitory (T) Grade 1 Cylindrical Lever Lock with 2-3/4" Backset

Premium Grade 1 Cylindrical Lock for Commercial Applications

The BEST 9K Series Dormitory (T) Lock delivers professional-grade security with Grade 1 BHMA certification and heavy-duty construction. Featuring a 2-3/4" backset, 9/16" latch throw, and corrosion-treated steel chassis, this cylindrical lever lock is engineered for demanding commercial applications. The dormitory function provides inside lever operation at all times while outside lever access is controlled by key or push button, making it ideal for educational facilities and multi-tenant buildings.

Professional Features & Benefits

Grade 1 BHMA Certification: Listed by BHMA for A156.2, Series 4000, Grade 1 for maximum durability and security in commercial applications.
Heavy-Duty Construction: Critical latch and chassis components are brass or corrosion-treated steel with zinc hubs and hardened steel alloy sleeve for exceptional torque resistance.
Attack-Resistant Design: Rose locking pin assembly and slotted key release cam provide maximum attack resistance while maintaining key access even when damaged.
Smooth Operation: Hub-mounted torsion spring and strong retractor springs prevent lever sag and deliver smooth, snappy operation throughout the lock’s service life.
Fire Rating Compliance: Listed by Underwriters Laboratories for use on 3-hour A label doors for single or double swinging applications.
Interchangeable Core Ready: Allows for quick re-keying and customized master keying systems for flexible access control management.
Anti-Microbial Option Available: UltraShield antimicrobial protected coating (626AM finish) inhibits bacterial growth for healthcare and high-cleanliness applications.
10-Year Manufacturer Warranty: Comprehensive warranty coverage provides long-term confidence and protection for commercial installations.

Technical Specifications

ANSI/BHMA: F90
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 or push button). Inside lever is always unlocked and cannot be locked.
Grade: Grade 1
Handle Type: Lever
Keyed: Yes
Keyed Function: Single 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: T
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

Installation & Operation

Review manufacturer specifications and verify door preparation requirements including 1-3/4" to 2-1/4" door thickness and standard ANSI A115.2 bore preparation.
Use manufacturer-provided drill jig to mark mounting hole locations accurately, including two additional 5/16" diameter through-bolt holes at 12 o’clock and 6 o’clock positions.
Prepare door by drilling required 2-1/8" bore hole and routing for latch and strike preparation per ANSI A115.2 specifications.
Install chassis assembly and secure with through-bolts per manufacturer torque specifications for maximum attack resistance.
Adjust latch throw (9/16" standard) and verify proper alignment with strike plate for smooth latching operation.
Test lock operation including key function, lever operation, and dormitory function to verify proper installation. Refer to manufacturer documentation for complete installation details and troubleshooting.

Professional Applications

Educational Facilities and Dormitories
Healthcare Institutions
Commercial Office Buildings
Multi-Tenant Residential Properties
Government and Municipal Buildings
Hospitality and Hotel Properties
Industrial and Warehouse Facilities

Anti-Microbial Option

The BEST UltraShield antimicrobial protected coating (626AM finish) inhibits the growth of bacteria and other microbes on the hardware surface. This option is recommended for healthcare facilities, 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 brass and corrosion-treated steel construction rated for Grade 1 commercial applications. The 10-year manufacturer 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 smooth operation are essential.

Manufacturer Resources

9K Series Catalog

Service Manual for 9K Series

Product Specs

Series:: 9K Series
Subcategory:: Cylindrical Locks
Grade:: Grade 1
Duty Level:: Heavy Duty
Handle Type:: Lever
Keyed Function:: Single Cylinder
Warranty:: 10 Year
Standard Latch:: 9/16" Throw
Standard Strike:: 2-3/4 x 1-1/8" with curved lip and box
ANSI/BHMA:: F90
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 or push button). Inside lever is always unlocked and cannot be locked.
Lock Type:: Cylindrical
Lock Function:: Corridor/Dormitory
Product Attribute:: Cylindrical Locks
Product Model:: T
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 9K37T14CSTK626 – Frequently Asked Questions

1) Will the BEST 9K dormitory lock fit a 1-3/4 inch commercial door with a standard 2-1/8 inch bore?

Yes. The 9K cylindrical lockset goes into a standard ANSI A115.2 prep: a 2-1/8 inch cross bore, plus two additional 5/16 inch through-bolt holes at the 12 and 6 o'clock positions. Door thickness range is 1-3/4 to 2-1/4 inches, so a standard 1-3/4 inch commercial door is the middle of the range and a thicker fire or exterior leaf is still covered. Standard backset is 2-3/4 inches, which is the usual commercial backset.

2) What does the dormitory (T) function on a BEST 9K lock actually do at the door?

Inside lever is always free, so anyone in the room can get out without a key or a thumbturn. The outside lever is locked or unlocked by key or by the push button on the inside. That is the F90 corridor/dormitory function: someone leaving a dorm room or apartment can button the outside lever locked behind them, and a key still gets staff back in. If you need the outside lever locked permanently with key-only entry, that is a storeroom function, not this one.

3) Can I use a BEST 9K lever lock on a labeled fire door?

Yes. The 9K is UL listed for use on 3-hour A label doors, single or double swinging. It is also BHMA listed to A156.2, Series 4000, Grade 1, which is what most institutional specs call for on a corridor opening.

4) Will a BEST 9K lever latch into the strike that is already in my frame?

Depends which strike is in there. The 9K latch throws 9/16 inch and the standard strike supplied is a 2-3/4 x 1-1/8 inch with curved lip and box. If your frame is prepped for the taller 4-7/8 inch ANSI strike, order the S3 option instead of the STK. Those are the two strike choices, so match the one already cut into the frame and you can reuse the existing prep.

5) Can BEST 9K locks be master keyed into the system we already run in the building?

The 9K is keyed, single cylinder, and built for interchangeable core, so cores are pulled and swapped with a control key instead of pinning the lock in place. If your building already runs BEST interchangeable core, these drop into that master key system and rekeying a room is a thirty second job at the door. Useful for dorms and multi-tenant properties where tenants change and you do not want a locksmith call for every turnover.

6) What is the difference between a dormitory lock and a classroom or storeroom lever?

Function is the whole difference. Dormitory (T) lets the occupant lock the outside lever with a push button from inside, and the inside lever never locks. A classroom function has no inside button, the outside lever is locked and unlocked only by key from the corridor side, which is what the Cal-Royal AG03 classroom lever and the Dexter C1000 classroom lock do. A storeroom function keeps the outside lever locked at all times with key entry only, like the Cal-Royal AG05 with its deadlocking latchbolt or the Hager 2580 storeroom. Pick dormitory only when the person inside needs to control the lock.

7) The door does not need to be keyed at all, just latched. What replaces a dormitory lever on a passage opening?

A dormitory function is keyed, single cylinder, with the outside lever controlled by key or push button. On an opening where nothing needs to lock, a passage lever is the correct part. At Grade 1 the Falcon K101 is a passage cylindrical lock with non-handed levers, a 1-3/8 to 2-1/4 inch door thickness range, heavy duty rating and a fire rating; the Falcon T101 is also a Grade 1 heavy-duty passage lever. Corbin Russwin CL3110 is a Grade 1 vandal resistant passage lever for 1-3/4 to 2 inch doors. Design Hardware X75 is a Grade 1 passage lever for 1-3/4 inch doors. All four latch only and take no cylinder.

8) What should be used on a classroom door instead of a dormitory function lever?

Dormitory function leaves the inside lever always unlocked and cannot be locked, with the outside lever controlled by key or push button. A classroom opening is usually specified to lock the outside lever by key only, with no button anyone can press. Dexter C1000 lists a Grade 1 classroom cylindrical lever with clutching, keyed, for 1-3/8 to 1-3/4 inch doors, and a Grade 1 classroom security version in the same series. Cal-Royal AG03 is a classroom lever in the AG series with a 6-pin Schlage C keyway keyed different and a 2-3/4 inch backset. Choose by whether the room needs to be secured from inside the classroom as well.

9) The opening needs to stay locked from the outside at all times with free egress. Is a dormitory lever the right choice?

No. Dormitory function allows the outside lever to be left unlocked by key or push button, which means it can be left in an unsecured state. A storeroom function keeps the outside lever locked at all times and is opened by key only. Hager 2580 is a Grade 2 storeroom lever with the Withnell design for 1-3/8 to 2 inch doors, and Cal-Royal AG05 is a Grade 2 storeroom lever with a deadlocking latchbolt for 1-3/8 to 1-3/4 inch doors. For an institutional or utility room where the lock must be operated by key from both sides, Dexter C1000 offers a Grade 1 asylum function for 1-3/8 to 2 inch doors and Arrow MK33-BD-CS is an asylum function with a Schlage C keyway on a ball knob.

10) What matches a 2-3/4 inch backset if a different brand is used on adjacent doors?

The BEST 9K is supplied with a 2-3/4 inch backset as standard and also comes in 3-3/4 inch and 5 inch backsets. Among peers, Cal-Royal AG03 classroom lever is listed with a 2-3/4 inch backset and a 6-pin Schlage C keyway keyed different, so it drops into the same door prep centerline. Cal-Royal AG00 entrance lever is listed at a 2-3/8 inch backset, which is a different bore centerline and will not line up with a door already prepped at 2-3/4 inches. Lockey 1150S is offered with an adjustable backset. Check the existing prep before mixing brands across a run of doors.

11) Which alternatives are fire rated for a labeled door?

The BEST 9K is listed by Underwriters Laboratories for 3-hour A label doors in single or double swinging applications and carries an ANSI/BHMA F90 function designation. Among peers with a fire rating stated, Falcon K101 is a Grade 1 passage cylindrical lock with a fire rating and a 1-3/8 to 2-1/4 inch door thickness range, Corbin Russwin CL3110 is a Grade 1 vandal resistant passage lever with a fire rating for 1-3/4 to 2 inch doors, and Arrow MK02-TA is a privacy cylindrical lock with a fire rating for 1-3/4 to 2 inch doors. Note the two Grade 1 options are passage and the Arrow is privacy, so none of them is keyed the way a dormitory function is.

12) Do I have to specify handing when ordering a BEST 9K cylindrical lever?

No handing to specify. The 9K is non-handed, so one part number covers left and right hand openings and you can stock a single lock for a building with doors swinging both ways. That is one of the practical reasons cylindrical locksets get specified over mortise locks on large fleets of similar doors.

13) What backset options does the BEST 9K dormitory lock come in for wide stile or thick doors?

Three backsets: 2-3/4 inch, 3-3/4 inch, and 5 inch. The 2-3/4 inch is the standard commercial backset and covers most hollow metal and wood doors. The 3-3/4 and 5 inch options exist for wide stile openings where the lever has to sit further off the edge of the door, which is common on aluminum or heavy institutional entries.

14) Which finish should I order for a hospital or clinic corridor door?

626AM, satin chrome with the BEST UltraShield antimicrobial coating, which inhibits bacterial growth on the hardware surface. It is the finish BEST calls out for healthcare, elderly care, education, food service and hospitality. If antimicrobial is not a requirement, plain 626 satin chrome is the standard institutional finish; twelve finishes are offered in total, from 605 bright brass through 690 statuary dark bronze.

15) What lever and rose styles do I have to pick to match the other doors in the building?

Lever comes three ways: contour with angle return, curved with return, and curved without return. Rose is either the C rose at 3 inch convex or the D rose at 3-1/2 inch convex. If you are adding doors to a building already fitted with 9K, match the existing rose diameter first, since that is what shows the old paint ring if you get it wrong, then match the lever shape.

16) Is a Grade 1 lock like the BEST 9K worth it over a Grade 2 lever on apartment corridor doors?

Grade 1 is the heavy duty tier and it is what holds up on high traffic openings that get used hundreds of times a day. The 9K uses brass or corrosion treated steel latch and chassis parts, zinc hubs and a hardened steel alloy sleeve for torque resistance, plus a hub mounted torsion spring that keeps the lever from sagging. On a low traffic interior door a Grade 2 lever such as the Hager 2525 entry or the Falcon B511CP6D entry/office is a reasonable step down. On corridors, stairs and unit entries, buy the Grade 1.

17) What other Grade 1 cylindrical levers could I use instead of the BEST 9K?

For a keyed Grade 1 cylindrical lever, the Dexter C1000 Series covers entry/office, classroom, classroom security and asylum functions and takes 1-3/8 to 1-3/4 inch doors on the keyed entry version. Corbin Russwin's CL3100 Series is Grade 1, fire rated, and fits 1-3/4 to 2 inch doors, though the CL3110 is passage only. Falcon's K Series is Grade 1 and heavy duty across 1-3/8 to 2-1/4 inch doors. None of those substitute for the BEST interchangeable core if the building is already on a BEST key system, which is usually what decides it.

18) Does the BEST 9K dormitory lock need power or wiring at the door?

No. The 9K T is a mechanical lock, no wiring, no power supply, no door loop. If the opening needs to release on a card reader or drop open on a fire alarm, you want an electrified cylindrical lock instead, such as the Corbin Russwin CL33903 fail safe lever running 12VAC/DC on a 1-3/4 to 2 inch door.

19) Grade 1 is more lock than the opening needs. What is the lighter-duty version of a keyed commercial lever?

The BEST 9K is a heavy duty Grade 1 commercial lock. Where an interior or lower-traffic opening does not warrant that, Grade 2 keyed levers cover the same functions: Hager 2525 is a Grade 2 commercial entry lever for 1-3/8 to 2 inch doors, Hager 2580 is a Grade 2 storeroom lever with the Withnell lever on the same thickness range, Falcon B511CP6D is a Grade 2 medium duty entry/office lever, and Cal-Royal AG05 is a Grade 2 storeroom lever with a deadlocking latchbolt for 1-3/8 to 1-3/4 inch doors. Note that Grade 2 changes the ANSI cycle and strength class, so an opening spec calling for Grade 1 will not accept them.

20) Is a dummy lever a substitute for a dormitory lock on the inactive leaf of a pair?

No, and the difference matters when ordering a pair. A dormitory lock is keyed with a working latch, 9/16 inch throw, and a strike. A dummy lever has no latch and no chassis at all; it is surface mounted trim that only gives something to pull on. Accentra 455LN Augusta is a Grade 1 dummy cylindrical lever, Callan Bentley BN5051 is a Grade 2 dummy lever, and Baldwin Estate 5103 is offered in left hand and right hand half dummy versions. Use a dummy only on a leaf that never latches; the active leaf still needs the keyed lock.

21) Can a keypad lever be used in place of a keyed dormitory lock to avoid issuing keys?

It changes how the door is credentialed rather than swapping like for like. The BEST 9K is a non-electronic keyed lock with an interchangeable core, so it lives inside an existing master key system. Mechanical keypad alternatives include the Lockey 1150 heavy duty keypad lever set with double combination in passage function for 1-1/8 to 2 inch doors, the Lockey 1150S with adjustable backset on the same thickness range, and the Lockey 2835DC double combination keyless lever for 1 3/16 to 2 inch doors. Delaney LP250 is a Grade 2 electronic keypad leverlock. A keypad breaks the door out of the key system, so a facility standardizing on one keyway should weigh that.

22) Which cylindrical lever works on a door too thin for a heavy commercial lock?

The BEST 9K is a heavy duty commercial cylindrical lever. On thinner leaves, several peers publish narrower ranges that start lower: Arrow HK11 covers 1-3/8 to 1-3/4 inches, Cal-Royal AG00 entrance lever covers 1-3/8 to 1-3/4 inches with a 6-pin Schlage C keyway and a 2-3/8 inch backset, Cal-Royal AUS00 is a Grade 3 entrance/office lever with a solid brass forged body on the same range, and Deltana Manchester 6201 and Morant 6411 entry levers cover 1-3/8 to 2 inches. Confirm the leaf thickness before selecting, since the shorter range also limits how thick a door the same part will fit.

23) Is a knob lockset interchangeable with a cylindrical lever lock on the same door prep?

They share the cylindrical bored prep family but not the trim, and lever versus knob is often a code decision rather than a preference. The BEST 9K is a lever with a non-handed chassis. Knob alternatives in the same cylindrical family include Arrow HK11 with a ball knob in entrance function, Arrow MK02-TA with a Tudor knob in privacy function, and Arrow MK33-BD-CS with a ball knob in asylum function. Where accessibility requires operable hardware that needs no tight grasping or twisting of the wrist, the lever is the part that satisfies it.

24) The door only needs a privacy function for a restroom. What is used there instead?

A dormitory lock is keyed on the outside, which is not what a restroom or bedroom door calls for. Privacy function locks from the inside with no key on the outside. Arrow MK02-TA is a privacy function cylindrical lock with a Tudor knob, non-keyed, with a fire rating and a 1-3/4 to 2 inch door thickness range. Hager 2540 is a Grade 2 privacy cylindrical lock with the Withnell lever for 1-3/8 to 2 inch doors. Kwikset 300BRNL Breton is a Grade 3 privacy lever set for 1-3/8 to 1-3/4 inch doors, and Baldwin Estate 5103 is offered as a privacy lever with the 5048 rose.

25) Does a lever trim kit for an exit device replace a cylindrical lock?

No. A cylindrical lock is a complete chassis that bores into the door with its own latch and strike; a lever trim is outside trim that mounts to an exit device already on the door. Corbin Russwin 585F715 is a Grade 1 lock lever for the ED8000 pushpad exit device and the CL3300 cylindrical lock series, for 1-3/4 to 2 inch doors. Imperial USA ED-EL500HD is a heavy duty escutcheon lever trim in entry function from the ED-500 series. If the opening has no exit device, neither part will make the door latch on its own.

26) Can a cylinder adapter kit make one brand's lock accept another brand's key system?

Only in specific combinations, and it is not a general answer to keying a lock into an existing system. The BEST 9K is single cylinder and interchangeable core ready, so it is normally keyed by fitting the core the facility already uses. Accentra 107S is a Schlage cylinder adapter kit for Yale hardware, rated Grade 1, in the apartment exit/public toilet function. That kit addresses Yale hardware taking a Schlage cylinder, not a BEST core, so confirm the lock brand and cylinder format before ordering an adapter.

27) For a healthcare corridor, what competes with the antimicrobial finish option?

The BEST 9K offers a 626AM satin chrome antimicrobial finish using the UltraShield coating, which inhibits growth of bacteria and other microbes on the hardware surface, alongside standard finishes including 626 satin chrome, 630 range brasses and bronzes, 622 matte black and 690 statuary dark bronze. Peers in the same Grade 1 cylindrical family cover the function side of a healthcare opening: Dexter C1000 offers a Grade 1 asylum function for 1-3/8 to 2 inch doors and Corbin Russwin CL3110 is a Grade 1 vandal resistant passage lever for 1-3/4 to 2 inch doors. Match the function first, then the surface treatment the facility requires.

28) Will the outside lever on a BEST 9K still work if someone attacks the rose or breaks the trim?

The 9K uses a rose locking pin assembly and a slotted key release cam, so key access is retained even when the trim is damaged. Chassis is corrosion treated steel and the lock is held with through-bolts rather than screws into the rose alone, which is what resists a wrenched lever on a high abuse opening.

29) Which lever should go on a residential-grade interior door in the same building?

The BEST 9K is specified for commercial use at Grade 1. For interior residential openings in the same property, Grade 3 and Grade 2 leversets are the usual fit: Kwikset 200BRNL Breton is a Grade 3 passage lever for 1-3/8 to 1-3/4 inch doors, Callan Asheville AH5011 is a Grade 3 passage leverset, Callan Artino 360201 is a Grade 3 entrance leverset, and Bravura offers Grade 2 passage leversets in the Atlanta, Orlando, Miramar and Tampa designs, the Tampa with square trim and the others with round. Match the grade to the traffic the door actually sees.

How fast can I get the BEST 9K37T14CSTK626 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 9K37T14CSTK626 come with a warranty?

Absolutely. The BEST 9K37T14CSTK626 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 9K37T14CSTK626?

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 9K37T14CSTK626 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.

(786) 855-7489

BEST 9K Series Dormitory (T) Grade 1 Cylindrical Lever Lock with 2-3/4" Backset

BEST 9K Series Dormitory (T) Grade 1 Cylindrical Lever Lock with 2-3/4" Backset