Name: BEST 9K Series Grade 1 Storeroom Cylindrical Lever Lock with 2-3/4" Backset
Brand: BEST
SKU: 9K37G14CSTK626
Price: 666.23 USD
Availability: InStock

Product Overview
FAQs

BEST 9K Series Grade 1 Storeroom Cylindrical Lever Lock with 2-3/4" Backset

Premium Commercial-Grade Security Solution

The BEST 9K Series cylindrical lever lock delivers professional-grade security with Grade 1 BHMA certification and heavy-duty construction. This storeroom function 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 latch and chassis components of brass or corrosion-treated steel, the 9K series combines top-quality materials with exceptional craftsmanship for demanding commercial applications.

Professional Features & Benefits

Heavy-Duty Grade 1 Construction: BHMA A156.2 Series 4000 Grade 1 certification ensures maximum durability and security for high-traffic commercial applications.
Precision Door Compatibility: 2-3/4" standard backset with 2-1/16" diameter chassis fits 2-1/8" door holes, accommodating 1-3/4" to 2-1/4" door thickness.
Attack-Resistant Design: Rose locking pin and assembly design offers exceptional torque resistance, preventing twisting, bending, or breaking under attack while maintaining key access functionality.
Premium Materials: Critical components constructed of brass or corrosion-treated steel with zinc hubs featuring shrouded locking lugs for enhanced durability and torque resistance.
Smooth Operation: Hub-mounted torsion spring and strong retractor springs prevent lever sag while providing smooth, snappy operation throughout the lock’s service life.
Reinforced Security: Seamless one-piece hardened steel alloy outside lever sleeve provides additional reinforcement in the locking lug slot for maximum attack resistance.
Interchangeable Core System: Allows for quick re-keying and customized master keying to meet evolving security requirements without lock replacement.
10-Year Manufacturer Warranty: Comprehensive warranty coverage provides long-term confidence and protection for commercial installations.

Technical Specifications

ANSI/BHMA: F91
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 either the inside or the outside, locks or unlocks both sides.
Grade: Grade 1
Handle Type: Lever
Keyed: Yes
Keyed Function: Double Cylinder
Lock Function: Storeroom
Lock Type: Cylindrical
Product Attribute: Cylindrical Locks
Product Category: Mechanical Locks
Product Function: Storeroom
Product Group: Mechanical Locks
Product Model: G
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 door thickness from 1-3/4" to 2-1/4", 2-1/8" bore hole, and 2-3/4" backset dimensions.
Use manufacturer-provided templates 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 holes per ANSI A115.2 standards and additional through-bolt holes as specified in manufacturer instructions.
Install chassis, through-bolt mounting studs, and secure the lock assembly to door per manufacturer torque specifications for maximum attack resistance.
Adjust lever operation and latch alignment for proper engagement with strike plate, ensuring smooth operation throughout the full range of motion.
Test lock operation including key function from both sides, lever operation, and latch engagement. 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

Available with UltraShield™ antimicrobial protected coating (finish 626AM) that inhibits the growth of bacteria and other microbes on hardware surfaces. 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 brass and corrosion-treated steel construction rated for Grade 1 heavy-duty commercial applications. Protected by multiple patents and backed by a comprehensive 10-year warranty, the 9K series features attack-resistant design elements including rose locking pins, hardened steel reinforcement, and through-bolt mounting for maximum torque resistance. Engineered for demanding commercial applications where dependable security performance is 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:: Double 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:: F91
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 either the inside or the outside, locks or unlocks both sides.
Lock Type:: Cylindrical
Lock Function:: Storeroom
Product Attribute:: Cylindrical Locks
Product Model:: G
Product Function:: Storeroom
Door Hand Direction:: Non-Handed
Product Category:: Mechanical Locks
Product Substrate:: Corrosion-Treated Steel
Backset (Distance):: 2-3/4"
Department:: Door Hardware

BEST 9K37G14CSTK626 – Frequently Asked Questions

1) Will the BEST 9K storeroom lever fit a 2 inch thick door?

Yes. The 9K Series cylindrical lever lock covers door thicknesses from 1-3/4 inches through 2-1/4 inches, so a 2 inch door is inside the range with no special order. Door prep is a 2-1/8 inch bore with the chassis measuring 2-1/16 inches in diameter, plus two 5/16 inch through-bolt holes at the 12 and 6 o'clock positions. If your doors are 1-3/8 inch older interior slabs, this is the wrong lock family, that thickness is below what the 9K covers.

2) What does storeroom function mean on a BEST 9K lock, and is the outside lever always locked?

On the 9K storeroom lock the latch retracts by rotating the inside lever, or the outside lever when it has not been locked by key. Turning the key from either side locks or unlocks both sides. That is the double cylinder keyed arrangement, keyed on the inside as well as the outside. It is the standard choice for mechanical rooms, IT closets and supply rooms where you want the door secure by default and opened only with a key.

3) Do I need to specify handing when ordering a BEST 9K lever lock?

No handing to call out. The 9K lever lock is non-handed, so the same part goes on a left or right hand door. What you do have to pick is lever style (Contour with Angle Return, Curved with Return, or Curved without Return), rose style (C rose 3 inch convex or D rose 3-1/2 inch convex), finish, backset and strike. That makes it simple to stock one lock for a whole building and fit it wherever it is needed.

4) Which backset do I order for a BEST 9K lock on a wide door or a door with a big stile?

Three backsets are offered on the 9K: 2-3/4 inch, 3-3/4 inch and 5 inch. The 2-3/4 inch is the standard commercial backset and what the lock is specified at by default. The 3-3/4 and 5 inch options exist for doors with wider stiles or where the lever needs to sit further off the edge, common on some aluminum and institutional openings. Measure from the door edge to the center of the existing bore before you choose, since the backset must match the hole already in the door.

5) Will the BEST 9K latch work with the strike already in my frame?

The standard latch throws 9/16 inch and ships against a 2-3/4 x 1-1/8 inch strike with a curved lip and box. Two strike choices are offered: the STK 2-3/4 inch ANSI strike and the S3 4-7/8 inch ANSI strike. If your frames are already prepped for a 4-7/8 inch ANSI strike, order the S3 and the existing frame cutout carries over. If the frames take the smaller 2-3/4 inch face, order the STK. Matching the strike to the frame prep is what saves you filing or re-prepping the jamb.

6) Is the BEST 9K storeroom lock certified for high traffic commercial doors?

Yes. The 9K carries BHMA A156.2 Series 4000 Grade 1 certification and is classified heavy duty for commercial use. The ANSI/BHMA function code is F91, the storeroom designation. Latch and chassis components are brass or corrosion-treated steel, with zinc hubs carrying shrouded locking lugs and a one-piece hardened steel alloy outside lever sleeve. That is the build a facilities group standardizes on for corridor and service doors that get hit all day.

7) What is the difference between a BEST 9K storeroom lock and a Grade 2 storeroom lever like the Hager 2580 or Cal-Royal AG05?

All three do storeroom function, the difference is the grade and the keying system. The 9K is Grade 1 heavy duty with an interchangeable core. The Hager 2580 with the Withnell lever is Grade 2 and covers 1-3/8 to 2 inch doors, and the Cal-Royal AG05 is a Grade 2 storeroom lever with a deadlocking latchbolt covering 1-3/8 to 1-3/4 inch doors. If your doors are 1-3/8 inch, the 9K will not fit and one of the Grade 2 locks is the correct pick. On heavy commercial traffic, or where you are already running BEST cores across the building, the 9K is the one that matches.

8) What is a Grade 1 storeroom lever alternative to the BEST 9K if I need a keyed lever that always stays locked outside?

Within the Grade 1 cylindrical lever family, the closest keyed peers to the BEST 9K storeroom are the Dexter C1000 Series Entry/Office (DEX-C1000-ENTR) and the Dexter C1000 Series Classroom (DEX-C1000-CLRM), both Grade 1 clutching keyed cylindrical lever locks. The difference is the function, not the duty level: the BEST 9K is a storeroom function where turning the key from either side locks or unlocks both sides, while the C1000 entry/office and classroom functions control the outside lever differently. If the door has to stay secured to the outside at all times with free egress inside, stay with the 9K storeroom function; if staff need to leave the outside lever unlocked during business hours, the entry/office C1000 is the one that does that. Note the C1000 entry/office and classroom fit 1-3/8 inch to 1-3/4 inch doors, while the 9K covers 1-3/4 inch to 2-1/4 inch.

9) Is there a lighter-duty storeroom lever if Grade 1 is more than the opening needs?

Two Grade 2 storeroom levers cover the same function at a lower duty rating: the Cal-Royal AG05 Grade 2 storeroom lockset with deadlocking latchbolt (CAL-AG05-26D) and the Hager 2580 Grade 2 storeroom lock with Withnell lever (HAG-2580WTN26D). Both are storeroom function like the BEST 9K, so the door behaves the same way day to day. Where they part company is the door they fit and the certification: the BEST 9K is BHMA A156.2 Grade 1 for 1-3/4 inch to 2-1/4 inch doors, the Cal-Royal AG05 fits 1-3/8 inch to 1-3/4 inch, and the Hager 2580 fits 1-3/8 inch to 2 inch. On a specification calling out Grade 1 for a stairwell, mechanical room, or high-traffic institutional door, the Grade 2 units will not satisfy the callout.

10) What should I use instead on a classroom or patient room door where a storeroom lock is the wrong function?

On a classroom door, the Dexter C1000 Series Classroom (DEX-C1000-CLRM) and Classroom Security (DEX-C1000-CSEC) are Grade 1 keyed cylindrical levers built for that function, and for a patient room or utility opening the Dexter C1000 Asylum (DEX-C1000-ASYL) is the Grade 1 asylum/institution function, fitting 1-3/8 inch to 2 inch doors. The BEST 9K storeroom function keys both sides together: turning the key inside or outside locks or unlocks both sides, and there is no dedicated inside-key control of the outside lever the way a classroom security lock provides. Where a lockdown procedure calls for securing the door from inside the room, the classroom security C1000 addresses that; the 9K storeroom is the right choice for mechanical, storage, and stairwell doors that are simply always locked out.

11) My opening needs a 2-3/8 inch backset or a wider stile than a standard bore allows. What are the options?

The BEST 9K covers 2-3/4 inch, 3-3/4 inch, and 5 inch backsets, so wide-stile and unusual openings are handled inside the same series rather than by switching brands. For a 2-3/8 inch backset the Cal-Royal AG00 entrance lever (CAL-AG00) is built with a 2-3/8 inch backset and a 6-pin Schlage C keyway keyed different, and the Cal-Royal AG03 classroom lever (CAL-AG03) uses a 2-3/4 inch backset with the same keyway. Note the AG00 is an entrance function rather than storeroom, and the AG03 is classroom, so confirm the function before ordering on backset alone.

12) Can I rekey a BEST 9K lever lock without pulling the lock off the door?

Yes, that is the point of the interchangeable core design on the 9K. The core comes out and a new one goes in for rekeying or for folding the door into a master key system, without removing the chassis or re-prepping the door. For a property manager taking over a building or a locksmith rotating keys after a tenant turnover, the lock body stays put and only the core changes.

13) Is there a BEST 9K finish for a hospital or clinic where surfaces get touched constantly?

Order finish 626AM, satin chrome with the UltraShield antimicrobial protected coating, which inhibits growth of bacteria and other microbes on the hardware surface. BEST calls it out for healthcare, elderly care, education, transportation, food service and hospitality. Eleven other finishes are offered if the coating is not needed: 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 and 690 statuary dark bronze.

14) I need a Grade 1 lever on the same doors but not keyed, what pairs with a BEST 9K storeroom lock?

For the passage and closet doors alongside your storeroom openings, the Falcon K101 is a Grade 1 heavy duty passage cylindrical lock, non-handed, fire rated, covering 1-3/8 to 2-1/4 inch doors. The Corbin Russwin CL3110 is another Grade 1 passage option, vandal resistant and fire rated, for 1-3/4 to 2 inch doors. Both keep you at the same grade as the 9K on doors that do not need a key, so the whole opening set stays consistent in feel and durability.

15) Does the BEST 9K need an electrified or access control option, and does it work if the power drops?

The 9K storeroom lock is purely mechanical, no electronics, no wiring, no power supply. It holds secure whether or not the building has power, and a key opens it either way. If your opening genuinely needs electric control, that is a different product: the Corbin Russwin CL33903 is a Grade 1 fail safe electrified cylindrical lever at 12V AC/DC for 1-3/4 to 2 inch doors. Fail safe means it unlocks when power is lost, the opposite behavior from the 9K.

16) What door prep standard does a BEST 9K cylindrical lock follow?

Door prep follows ANSI A115.2, which is the standard cylindrical lock prep, plus two extra 5/16 inch diameter through-bolt holes at the 12 and 6 o'clock positions for the through-bolt mounting studs. Those through-bolts are what deliver the torque resistance, so they are not optional. If your doors are already prepped to A115.2 with a 2-3/4 inch backset and 2-1/8 inch bore, you are drilling only the two through-bolt holes.

17) I need a matching non-keyed lever for the corridor and closet doors alongside a keyed storeroom lock. What Grade 1 passage levers pair with it?

For non-keyed openings on the same job, the Grade 1 cylindrical passage levers are the Falcon K101 (FAL-K101-NON-KEYED), heavy duty, fire rated, fitting 1-3/8 inch to 2-1/4 inch doors; the Falcon T101 (FAL-T101-NONKEYED), heavy duty with pressure release technology; the Corbin Russwin CL3110 (COR-CL3110-NON-KEYED), vandal resistant and fire rated for 1-3/4 inch to 2 inch doors; and the Design Hardware X75 (DH-X-75-F) with a flat lever for 1-3/4 inch doors. All are passage function, so the lever always retracts the latch and there is no cylinder. The BEST 9K is keyed storeroom function, so it is the one that goes on the doors that must stay secured. The Falcon K101 matches the 9K door thickness range most closely at 1-3/8 inch to 2-1/4 inch against the 9K's 1-3/4 inch to 2-1/4 inch.

18) Which lever locks look like a substitute for a BEST 9K storeroom but will not do the same job?

Several cylindrical levers sit in the same shape but not the same duty or function. The Falcon B101 (FAL-B101) and Falcon B511CP6D (FAL-B511CP6D) are Grade 2 medium duty, passage and entry/office respectively. The Accentra 5301LN Augusta (YAL-AU-5301LN) and 4601LN (YAL-AU4601LN) are Grade 2 passage locks. The Hager 2510 (HAG-2510) is a Grade 2 passage lever and the Hager 2525 (HAG-2525) a Grade 2 entry lock. Dummy trim such as the Accentra 455LN Augusta single dummy (YAL-AU-455LN) has no latch action at all. None of these are Grade 1 storeroom function. The BEST 9K is Grade 1 heavy duty, keyed, storeroom function, non-handed, with a 9/16 inch throw latch, so a Grade 2 passage or entry lever will neither hold a Grade 1 callout nor keep the outside lever secured.

19) Can I use a keypad or electrified lever in place of a keyed storeroom lock on a back-of-house door?

If the goal is to drop keys entirely, the mechanical keypad options are the Lockey 1150 (LOC-1150), a heavy duty keypad lever set with double combination in passage function for 1-1/8 inch to 2 inch doors, the Lockey 1150S (LOC-1150S) with adjustable backset, and the Lockey 2835DC (LOC-2835-DC) double combination keyless lever for 1 3/16 inch to 2 inch doors. For access control tied to a system, the Corbin Russwin CL33903 (COR-CL33903-KEYED-12AD) is a Grade 1 electrified fail safe cylindrical lever running 12VAC/DC on 1-3/4 inch to 2 inch doors, which requires power and door wiring. The BEST 9K is a mechanical, non-electronic keyed lock with an interchangeable core, so re-keying and master keying happen at the core rather than at a combination or a control panel.

20) Is a knob lock an acceptable swap for a lever storeroom lock, and what knob options are there?

The knob options in the same cylindrical family are the Arrow HK11 turn-pushbutton entrance lock with ball knob and conventional cylinder (AR-HK11-BB), the Arrow MK02-TA privacy lock with Tudor knob (AR-MK02-TA), and the Arrow MK33-BD-CS asylum lock with ball knob and Schlage C keyway (AR-MK33-BD-CS). The functional difference that matters for accessibility is the operating trim: the BEST 9K uses a lever, which is the trim type usually required on accessible routes and egress doors in commercial buildings. The Arrow knob units also differ in function from a storeroom lock: the HK11 is entrance, the MK02 privacy, and the MK33 asylum/institution/utility.

21) I have Yale hardware keyed to a Schlage system. Does the BEST 9K solve that, or is there a different part?

They solve different problems. The Accentra 107S is a Schlage cylinder adapter kit for Yale hardware (YAL-107S), a component that lets existing Yale hardware take a Schlage cylinder, not a complete lockset. The BEST 9K is a complete keyed cylindrical lever lock built around an interchangeable core system, so re-keying and master keying happen by swapping the core rather than by adapting a cylinder into another maker's chassis. If the aim is to bring a door onto one keying system with new hardware, the 9K is the lockset; if the aim is to keep the Yale chassis already on the door, the 107S adapter is the part.

22) For a healthcare corridor, which storeroom lever handles infection-control requirements?

The BEST 9K storeroom lock is offered in finish 626AM, satin chrome with UltraShield antimicrobial protected coating that inhibits growth of bacteria and other microbes on the hardware surface, alongside the standard finishes. Among the Grade 1 peers, the Dexter C1000 Asylum (DEX-C1000-ASYL) is the asylum/institution/utility function often specified on patient and utility rooms for 1-3/8 inch to 2 inch doors, and the Corbin Russwin CL3110 (COR-CL3110-NON-KEYED) is a Grade 1 fire rated vandal resistant passage lever for the non-keyed corridor doors. The 9K is the keyed storeroom piece of that set, and it is the one with an antimicrobial finish option.

23) Do BEST 9K levers sag over time like cheaper lever locks?

The 9K uses a hub-mounted torsion spring plus strong retractor springs specifically to stop lever sag and keep the return snappy over the service life. The outside lever sleeve is one-piece hardened steel alloy, reinforcing the locking lug slot, and a rose locking pin resists twisting, bending or breaking under attack while keeping key access working. That combination is why it holds up on doors that see hundreds of cycles a day.

24) For a residential-grade interior door on the same property, what costs less duty than a Grade 1 commercial lever?

For interior doors that never see commercial traffic, the Grade 3 levers include the Kwikset 200BRNL Breton passage (KWI-200BRNLRDT) and the Kwikset 300BRNL Breton privacy (KWI-300BRNLRDT), both for 1-3/8 inch to 1-3/4 inch doors, plus the Callan Asheville Grade 3 passage (CLN-AH5011) and the Callan Artino Grade 3 entrance (CLN-360201). The Cal-Royal AUS00 is a Grade 3 entrance/office lever with a solid brass forged body for 1-3/8 inch to 1-3/4 inch doors. None of these is a storeroom function or a Grade 1 commercial lock, so keep them on bedroom, bath, and closet doors and put the BEST 9K, which is rated commercial Grade 1 heavy duty, on the doors that carry the traffic and the security requirement.

25) What matches a storeroom lever aesthetically on doors that only need dummy trim?

For dummy openings such as inactive leaves and closet fronts, the options are the Accentra 455LN Augusta Grade 1 single dummy cylindrical lever (YAL-AU-455LN), the Callan Bentley Grade 2 dummy lever (CLN-BN5051), the Baldwin Estate 5103 half dummy in left hand (BAL-5103-LDM) and right hand (BAL-5103-RDM), and the Emtek Arts and Crafts dummy pair (EMTEK-ARTS-AND-CRAFTS-LEVERSETS-AC-DUMMY-PAIR). Two things to check against the working doors: the Baldwin 5103 half dummies are handed, whereas the BEST 9K is non-handed, and finish continuity matters, since the 9K runs finishes from 605 bright brass through 626 satin chrome and 690 statuary dark bronze. Dummy trim has no latch, so it belongs only on doors that never need to latch.

How fast can I get the BEST 9K37G14CSTK626 delivered?

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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 9K37G14CSTK626 come with a warranty?

Absolutely. The BEST 9K37G14CSTK626 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 9K37G14CSTK626?

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BEST 9K Series Grade 1 Storeroom Cylindrical Lever Lock with 2-3/4" Backset

BEST 9K Series Grade 1 Storeroom Cylindrical Lever Lock with 2-3/4" Backset