Name: BEST 9K Series Grade 1 Cylindrical Keyed Lever Lock with Storeroom Function
Brand: BEST
SKU: 9K37AB15CS3626
Price: 609.04 USD
Availability: InStock

Product Overview
FAQs

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

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. Featuring a 2-3/4" backset, 9/16" latch throw, and interchangeable core capability, this lock is engineered for demanding commercial applications requiring reliable access control. Built with corrosion-treated steel chassis components and zinc alloy lever handles, the 9K Series combines exceptional durability with smooth operation for doors ranging from 1-3/4" to 2-1/4" thickness.

Professional Features & Benefits

Grade 1 BHMA Certification: Listed by BHMA for A156.2, Series 4000, Grade 1 providing the highest level of commercial security and durability standards.
Heavy-Duty Construction: Corrosion-treated steel chassis with zinc alloy lever handles and brass trim components for exceptional durability in high-traffic commercial applications.
Storeroom Function: Turn/push-button locking mechanism locks outside lever requiring key access until manually unlocked, ideal for secure storage and restricted access applications.
Attack-Resistant Design: Rose locking pin assembly prevents twisting and breaking under attack, while slotted key release cam maintains key access even when damaged.
Through-Bolt Mounting: Strong through-bolt mounting studs with 5/16" diameter holes at 12 and 6 o'clock positions provide superior torque resistance and security.
Interchangeable Core System: Allows for quick re-keying and customized master keying for flexible access control management.
UL Fire Rating: Listed by Underwriters Laboratories for use on 3-hour A label doors for single or double swinging applications.
10 Year Limited Warranty: Comprehensive manufacturer warranty provides long-term protection and confidence in commercial installations.

Technical Specifications

ANSI/BHMA: F109
Backset (Distance): 2-3/4"
Commercial/Residential: Commercial
Department: Door Hardware
Door Hand Direction: Non-Handed
Duty Level: Heavy Duty
Electronic: No
Grade: Grade 1
Handle Type: Lever
Keyed: Yes
Keyed Function: Single Cylinder
Lock Function: Storeroom
Lock Function Description: Turn/push-button locking - pushing and turning button locks outside lever, requiring use of key until button is manually unlocked. Push-button locking, pushing button locks outside lever until unlocked by key or by turning inside lever.
Lock Type: Cylindrical
Product Attribute: Cylindrical Locks
Product Category: Mechanical Locks
Product Function: Storeroom
Product Group: Mechanical Locks
Product Model: AB
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

Review manufacturer specifications and verify door preparation requirements including door thickness (1-3/4" to 2-1/4"), 2-1/16" diameter chassis hole, and handing as applicable to this product.
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 standard door preparation and routing as specified in manufacturer instructions.
Install all mounting hardware including through-bolt studs and secure the device to door per manufacturer torque specifications.
Adjust operational components including push-button mechanism for proper alignment, latching, and smooth operation throughout the full range of motion.
Test device operation to verify proper storeroom function, key operation, 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

Available with UltraShield antimicrobial protected coating (finish 626AM) that inhibits the growth of bacteria and other microbes on the surface of the hardware. 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 corrosion-treated steel construction and Grade 1 BHMA certification for demanding commercial applications. The 10 Year Limited Warranty and UL fire rating demonstrate BEST's commitment to quality and safety. Engineered for heavy-duty performance with attack-resistant design features and interchangeable core flexibility for comprehensive access control solutions.

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 Limited
Lock Function Description:: Turn/push-button locking - pushing and turning button locks outside lever, requiring use of key until button is manually unlocked. Push-button locking, pushing button locks outside lever until unlocked by key or by turning inside lever.
Standard Latch:: 9/16" Throw
Standard Strike:: 2-3/4 x 1-1/8" with curved lip and box
ANSI/BHMA:: F109
Product Group:: Mechanical Locks
Product Subgroup:: Bored Locksets
Product Type:: Leversets
Keyed:: Yes
Electronic:: No
Commercial/Residential:: Commercial
Lock Type:: Cylindrical
Lock Function:: Storeroom
Product Attribute:: Cylindrical Locks
Tags:: 9K37AB15DS3626
Product Model:: AB
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 9K37AB15CS3626 – Frequently Asked Questions

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

Yes. The 9K Series cylindrical lever covers doors from 1-3/4 inches up to 2-1/4 inches, so a 2 inch door is inside the range with no filler kit or long-spindle option needed. The door needs a 2-1/16 inch chassis bore plus two 5/16 inch through-bolt holes at the 12 and 6 o'clock positions.

2) What does storeroom function mean on a BEST 9K lever, and is it the right function for a supply room?

Storeroom on the 9K works off a turn/push-button in the inside lever: push and turn the button and the outside lever stays locked, and only the key retracts the latch until someone manually releases the button. Push the button without turning and the outside lever locks until a key is used or the inside lever is turned. The inside lever is always free for egress. That is the right setup for supply rooms, IT closets, mechanical rooms and anywhere the door should stay secure without anyone remembering to lock it. It is catalogued as ANSI/BHMA F109.

3) Do I have to order the BEST 9K lever handed for a left-hand door?

No handing to specify. The 9K cylindrical lever is non-handed, so one part number works on left and right hand doors and on reverse-bevel openings. Handing only matters if you are ordering separate lever trim styles for aesthetic reasons, not for the lock to function.

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

The standard latch throws 9/16 inch and ships with a 2-3/4 x 1-1/8 inch curved lip strike with box. If your frame is prepped for a 4-7/8 inch ANSI strike, order the S3 option instead of the STK 2-3/4 inch strike and the lock drops into the existing frame cutout. Those are the two strike choices offered, so match the one already routed into your frame rather than re-prepping steel.

5) Can I get a BEST 9K lever with a 5 inch backset for a narrow-stile or unusual door prep?

Backset comes in three choices: 2-3/4 inch standard, 3-3/4 inch, and 5 inch. The 3-3/4 and 5 inch options exist for doors where the bore sits farther off the edge, which is common on wide-rail aluminum and certain institutional preps. Measure from the door edge to the center of the existing 2-1/16 inch bore and order the backset that matches, because the wrong backset means the latch will not reach the strike.

6) Is the BEST 9K lever approved for a fire-rated door?

Yes. The 9K is UL listed for use on 3-hour A label doors, single or double swinging. Combined with the F109 storeroom function, where the outside lever stays locked and the latch is always engaged, it is what a facility spec normally calls for on a rated stair or storage door.

7) Does the BEST 9K take a small format interchangeable core so I can key it into my existing master system?

The 9K is built around BEST's interchangeable core, which is the point of the series: the core pulls with a control key and drops into an existing masterkey system without taking the lock off the door. It is a single cylinder lock, keyed outside with a free inside lever. For a locksmith standardizing a building, that means re-keying a whole floor is a core swap, not a lockset swap.

8) Is the BEST 9K tough enough for a high-traffic commercial door, or is a Grade 2 storeroom lock enough?

The 9K is BHMA certified to A156.2, Series 4000, Grade 1, heavy duty, with a corrosion-treated steel chassis, zinc alloy levers and through-bolt mounting for torque resistance. Grade 1 is the top commercial tier and is what belongs on a stair, corridor or main storage door that gets cycled all day. If the opening is light traffic and the budget matters more, the Hager 2580 with Withnell lever is a Grade 2 storeroom cylindrical lock, and the Cal-Royal AG05 is a Grade 2 storeroom leverset with a deadlocking latchbolt.

9) Will the BEST 9K work on a 1-3/8 inch door?

No. The 9K starts at 1-3/4 inches, which is the standard commercial door thickness, and runs to 2-1/4 inches. On a 1-3/8 inch door, common on older interior openings, you need a lock rated down that far: the Dexter C1000 Entry/Office covers 1-3/8 to 1-3/4 inches in Grade 1, and the Hager 2580 storeroom lever covers 1-3/8 to 2 inches in Grade 2.

10) What lever lock should be specified when the door has to release on a fire alarm rather than stay locked like a storeroom function?

A storeroom lock holds the outside lever locked, so it is the wrong choice where the opening must unlock on alarm. The Corbin Russwin CL33903 is a Grade 1 fail safe electrified cylindrical lever lock in 12VAC/DC, available with the NZ lever and D rose, for doors 1-3/4 inch to 2 inch. Fail safe means the lock releases when power drops. The BEST 9K is a mechanical storeroom lock and does not take power, so on a door tied into the fire alarm or access control the electrified CL33900 is the one that meets the sequence.

11) Is there a lighter-duty storeroom lever lock that will work where a Grade 1 BEST 9K is more than the opening needs?

Two Grade 2 storeroom levers cover that case. The Cal-Royal AG05 is a Grade 2 storeroom lever lockset with a deadlocking latchbolt for doors 1-3/8 inch to 1-3/4 inch, and the Hager 2580 is a Grade 2 storeroom cylindrical lock with the Withnell lever for doors 1-3/8 inch to 2 inch. Both hold the outside lever locked to key access like the BEST 9K storeroom function, but the 9K carries Grade 1 with a 2-3/4 inch backset and a 9/16 inch latch throw, and it is the one that takes a BEST interchangeable core for master keying across a facility.

12) What is the difference between a BEST 9K storeroom lock and an entrance or entry/office lever?

On a BEST 9K storeroom lock the outside lever stays locked and takes a key until someone manually releases the button, so it does not get left unsecured. An entry/office lever unlocks and relocks as the user chooses: the Dexter C1000 entry/office lever is Grade 1, keyed and clutching for doors 1-3/8 inch to 1-3/4 inch, the Falcon B511CP6D is a Grade 2 medium-duty entry/office lever, and the Hager 2525 is a Grade 2 commercial cylindrical entry lock for doors 1-3/8 inch to 2 inch. Pick the entry/office style where staff need the door left unlocked during business hours, and the 9K storeroom where the door must never be able to sit unlocked.

13) What replaces a BEST 9K storeroom lock when the door needs to run on a code or credential instead of a key?

Where the key is the problem rather than the function, a keyless lever covers the same opening. The Lockey 1150 is a heavy-duty mechanical keypad lever set with double combination in a passage function for doors 1-1/8 inch to 2 inch, the Lockey 1150S adds an adjustable backset over the same door range, and the Lockey 2835DC is a double-combination mechanical keyless lever for doors 1 3/16 inch to 2 inch. The Delaney LP250 is a Grade 2 electronic keypad lever lock and the Emtek Classic keypad leverset is an electronic option. The BEST 9K is a mechanical, non-electronic lock and its interchangeable core is what makes it master-key across a facility; the keypad units are managed by code instead.

14) On a 5 inch backset opening, what cylindrical lever lock will reach when the usual Grade 1 levers stop at 2-3/4 inches?

The BEST 9K storeroom lever is built in 2-3/4 inch, 3-3/4 inch, and 5 inch backsets, so it covers wide-stile and unusual door prep that a fixed-backset lock cannot. The comparable Grade 1 cylindrical levers run standard backsets: the Cal-Royal AG03 classroom lever is a 2-3/4 inch backset and the Cal-Royal AG00 entrance lever is a 2-3/8 inch backset. Among keyless units, the Lockey 1150S is a mechanical keypad lever set with an adjustable backset. For a keyed Grade 1 storeroom door with a long backset, the 9K is the one to order, and it ships with either the S3 4-7/8 inch ANSI strike or the STK 2-3/4 inch ANSI strike to match the frame prep.

15) Will a Kwikset or Callan lever work as a substitute for a BEST 9K on a commercial storeroom door?

Those are built for a lighter duty cycle. The Kwikset 200BRNL Breton passage lever and the Kwikset 300BRNL Breton privacy lever are Grade 3 for doors 1-3/8 inch to 1-3/4 inch, and the Callan Artino and Bennett entrance leversets are Grade 3. The BEST 9K is Grade 1, listed by BHMA for A156.2 Series 4000 Grade 1, heavy duty, UL listed for 3-hour A label doors, and keyed as a storeroom function. On a commercial storeroom carrying a fire label or a Grade 1 spec, the Grade 3 levers do not meet it; they belong on interior and residential-grade openings.

16) What finish should I order for a healthcare corridor where infection control is a concern?

Order 626AM, satin chrome with the UltraShield antimicrobial coating, which inhibits bacteria and other microbe growth on the hardware surface. BEST recommends it for healthcare, elderly care, education, transportation, food service and hospitality. It matches standard 626 satin chrome visually, so it can go on high-touch doors while the rest of the building runs plain 626.

17) What finishes and lever styles does the BEST 9K come in for matching the rest of my building?

Twelve finishes: 605 bright brass, 606 satin brass, 611 bright bronze, 612 satin bronze, 613 satin bronze oil-rubbed, 618 bright nickel, 619 satin nickel, 622 matte black, 625 bright chrome, 626 satin chrome, 626AM satin chrome antimicrobial, and 690 statuary dark bronze. Three lever shapes are offered, contour with angle return, curved with return, and curved without return, on either a 3 inch C convex rose or a 3-1/2 inch D convex rose. If you are adding doors to an existing 9K building, the D rose is the larger of the two and will cover a wider prep scar.

18) What is a Grade 1 alternative to the BEST 9K storeroom lock if I do not want interchangeable cores?

For a Grade 1 cylindrical lever without the BEST core system, the Dexter C1000 Series covers the same class of openings, with an Entry/Office version, a Classroom version and a Classroom Security version, all Grade 1 and rated 1-3/8 to 1-3/4 inch doors. Falcon's K Series K101 is Grade 1 heavy duty and fire rated, spanning 1-3/8 to 2-1/4 inch doors, though that one is passage function with no key. Note the thickness difference: the Dexter tops out at 1-3/4 inch, so on a 2 inch or 2-1/4 inch door the 9K is the one that fits.

19) What has to be specified when ordering a BEST 9K storeroom lever?

Five things decide the part number: backset (2-3/4, 3-3/4 or 5 inch), lever style (contour with angle return, curved with return, curved without return), rose (3 inch C convex or 3-1/2 inch D convex), strike (STK 2-3/4 inch ANSI or S3 4-7/8 inch ANSI), and finish. Handing is not one of them, since the lock is non-handed. Get the backset and strike right off the existing door and frame prep and the rest is appearance.

20) What door prep standard does the BEST 9K follow so I can spec it on a drawing?

Door prep follows ANSI A115.2, with a 2-1/16 inch diameter chassis bore, a 2-3/4 inch standard backset, and two 5/16 inch through-bolt holes at the 12 and 6 o'clock positions. On the frame side the standard strike is 2-3/4 x 1-1/8 inch with a curved lip and box, with a 4-7/8 inch ANSI strike available. That is the same prep most Grade 1 cylindrical locks use, so an existing 161 prep normally takes it.

21) The door does not need to be keyed at all - what heavy-duty lever goes on the openings next to a BEST 9K storeroom door?

For the non-keyed openings in the same run, 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, and the Falcon T101 is a Grade 1 heavy-duty passage lever with pressure release technology. The Corbin Russwin CL3110 is a Grade 1 vandal-resistant passage/closet lever, fire rated, for doors 1-3/4 inch to 2 inch. All three are passage only, so the latch retracts from either side at all times; the BEST 9K is the keyed storeroom lock in the set, single cylinder, with the outside lever held locked until the button is released.

22) Can a Baldwin Estate 5103 or an Emtek dummy lever replace a BEST 9K on a secured door?

No. The Baldwin Estate 5103 is offered in passage, privacy, and left- and right-hand half dummy versions, and the Emtek Arts and Crafts and Cortina leversets are sold as dummy pairs. Dummy levers are fixed trim with no latch and privacy levers lock only from inside with an emergency release, so neither takes a key. The BEST 9K is a keyed single-cylinder storeroom lock with a 9/16 inch throw latch and interchangeable core, which is what a secured opening needs. The Baldwin and Emtek levers suit the closet, French door, and interior openings on the same job.

23) For a healthcare corridor, which keyed lever lock holds up and which one carries an antimicrobial finish?

The BEST 9K storeroom lever is a Grade 1 heavy-duty commercial lock with a corrosion-treated steel chassis, and it is offered in a 626AM satin chrome antimicrobial finish alongside the standard 626 satin chrome and ten other finishes. Among comparable keyed heavy-duty levers, the Dexter C1000 Series asylum lock is Grade 1 for institutional and utility openings on doors 1-3/8 inch to 2 inch, and the Arrow MK33-BD-CS is a heavy-duty asylum cylindrical lock with a ball knob and Schlage C keyway. The asylum function keys both sides; the 9K storeroom keys the outside only. If the antimicrobial coating is the deciding requirement, the 9K in 626AM is the one that carries it.

24) Does a lever style choice force a different lock model, or can one Grade 1 chassis carry the trim the architect drew?

The BEST 9K storeroom lock carries the same Grade 1 chassis under three lever styles - contour with angle return, curved with return, and curved without return - on either a C rose 3 inch convex or a D rose 3-1/2 inch convex, in finishes from 605 bright brass through 690 statuary dark bronze. Comparable levers tie trim to the model: the Hager 2580 storeroom lock comes with the Withnell lever, the Corbin Russwin CL33903 is listed with the NZ lever and D rose, and the Arrow GL01 uses the Sierra lever. Where a job needs matched trim across many doors with the function varying, the 9K holds the appearance constant.

25) How does the BEST 9K hold up against someone forcing the lever?

Three things carry the load. The rose locking pin assembly resists twisting and breaking under attack, the through-bolt studs pass through 5/16 inch holes at 12 and 6 o'clock so the lock cannot be pulled off the face of the door, and a slotted key release cam keeps the key working even if the lock is damaged. The chassis is corrosion-treated steel. That combination is the reason this goes on exterior storage and mechanical rooms rather than a Grade 2 set.

26) What is the equivalent lever when the same opening needs privacy instead of a key?

Restroom and similar openings take a privacy lock rather than a storeroom lock. The Arrow MK02-TA is a privacy cylindrical lock with a Tudor knob, non-keyed and fire rated for doors 1-3/4 inch to 2 inch, and the Baldwin Estate 5103 privacy lever with the 5048 rose covers the decorative side of the same function. Privacy locks throw from inside and release in an emergency without a key; the BEST 9K is single cylinder keyed with the storeroom function, so it is not interchangeable with a privacy set even where the door prep is the same 2-3/4 inch backset.

27) Which Grade 1 passage lever is the match for a BEST 9K on the non-secured half of a job at a lower duty than heavy commercial?

The Design Hardware X75 is a Grade 1 passage lever lockset with a flat lever for 1-3/4 inch doors, and the Design Hardware J75 is the Grade 2 version of the same flat lever passage set, also for 1-3/4 inch doors. The Accentra 5301LN Augusta is a Grade 2 passage/closet cylindrical lever and the Accentra 4601LN is a Grade 2 passage lever with Augusta trim. The BEST 9K is the Grade 1 keyed storeroom lock in the mix and it covers a wider door range at 1-3/4 inch to 2-1/4 inch, so on thicker doors the passage sets fixed at 1-3/4 inch will not pair with it.

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Can I return it if it doesn’t work for me?

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Does the BEST 9K37AB15CS3626 come with a warranty?

Absolutely. The BEST 9K37AB15CS3626 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.

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

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