BEST 9K Series Grade 1 Cylindr...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,089.00
$586.71
BEST BEST 9K Storeroom (D) Lock - Grade 1 Cylindrical Keyed Lever Lock BES-9K-D-KEYED

BEST 9K Series Grade 1 Cylindrical Storeroom Lock with D Rose Configuration

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Model: 9K37D-14-D-S3-626
$1,089.00
$586.71
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,089.00
$586.71
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BEST 9K Series Grade 1 Cylindrical Storeroom Lock with D Rose Configuration

Premium Commercial-Grade Security Solution

The BEST 9K Series cylindrical 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 D rose configuration (3-1/2" convex) for demanding commercial applications. Built with corrosion-treated steel chassis and brass components, the 9K series combines exceptional craftsmanship with innovative design features for maximum attack resistance and long-term reliability.

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: Corrosion-treated steel chassis with brass latch and critical components for exceptional durability in high-traffic applications.
  • Rose Configuration: 3-1/2" convex D rose with locking pin design offers superior torque resistance and prevents pin twisting or breaking under attack.
  • Attack-Resistant Design: Slotted key release cam and locking lug assembly create maximum resistance while maintaining key access even when damaged.
  • Through-Bolt Mounting: Strong mounting studs with 5/16" diameter holes at 12 and 6 o'clock positions increase torque resistance and security.
  • Interchangeable Core Ready: Allows for quick re-keying and customized master keying for flexible access control management.
  • Lost Motion Feature Available: Optional 45° lever rotation in either direction without engaging retractor assembly for specialized applications.
  • 10 Year Manufacturer Warranty: Comprehensive warranty coverage for added confidence and protection in commercial installations.

Technical Specifications

  • ANSI/BHMA: F86
  • 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: Turning the key in the outside lever/ rotating the inside lever. Outside lever is always fixed and cannot be unlocked. Inside lever cannot be locked and it is always unlocked.
  • Grade: Grade 1
  • Handle Type: Lever
  • Keyed: Yes
  • Keyed Function: Single Cylinder
  • Lock Function: Storeroom
  • Lock Type: Cylindrical
  • Product Attribute: Cylindrical Locks
  • Product Category: Mechanical Locks
  • Product Function: Storeroom
  • Product Group: Mechanical Locks
  • Product Model: D
  • 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

  1. Review manufacturer specifications and verify door preparation requirements including door thickness (1-3/4" to 2-1/4" standard), backset distance, and handing as applicable to this product.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces, including standard ANSI A115.2 preparation plus two additional 5/16" diameter through-bolt holes at 12 and 6 o'clock positions.
  3. Prepare door and frame by drilling required holes and routing as specified in manufacturer instructions.
  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

Why Choose BEST Quality?

BEST 9K Series cylindrical locks deliver professional-grade reliability with corrosion-treated steel construction and brass components rated for heavy-duty commercial applications. The innovative attack-resistant design features and Grade 1 BHMA certification ensure dependable performance in demanding security environments. Backed by a comprehensive 10 year warranty, the 9K series is engineered for commercial applications where superior security and long-term durability are essential.

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:
F86
Product Group:
Mechanical Locks
Product Subgroup:
Bored Locksets
Product Type:
Leversets
Keyed:
Yes
Electronic:
No
Commercial/Residential:
Commercial
Function Description:
Latch operated by: Turning the key in the outside lever/ rotating the inside lever. Outside lever is always fixed and cannot be unlocked. Inside lever cannot be locked and it is always unlocked.
Lock Type:
Cylindrical
Lock Function:
Storeroom
Product Attribute:
Cylindrical Locks
Tags:
9k37d15ds3626
Product Model:
D
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 9K37D-14-D-S3-626 – Frequently Asked Questions

1) What does the storeroom function on the BEST 9K lock actually do at the door?
The outside lever on the 9K storeroom lock is always fixed. You get in only by turning the key in the outside lever; the inside lever always retracts the latch and can never be locked, so egress is free at all times. There is no way to leave the outside lever unlocked, which is the point of a storeroom lock: the door secures itself every time it closes. If you need staff to be able to leave the outside lever unlocked during the day, storeroom is the wrong function and you want an entrance/office function instead.
2) Will a BEST 9K cylindrical lever lock fit my existing 2-3/4 inch backset door prep?
Yes. The 9K standard backset is 2-3/4 inches, the usual commercial bored prep, and it is also orderable in 3-3/4 inch and 5 inch backsets for wide stile or unusual door prep. Note that the 9K asks for more than a plain 161 hole: it takes standard ANSI A115.2 prep plus two extra 5/16 inch through-bolt holes at the 12 and 6 o'clock positions. If you are swapping into a door drilled for a lock without through-bolts, you will be drilling those two holes.
3) Do I have to specify handing when I order a BEST 9K lever lock?
No. The 9K cylindrical lock is non-handed, so one lock covers left and right hand doors and you do not need to know the swing before you order. What you do need to pick is finish, lever style, rose size, backset and which strike ships with it.
4) Is the BEST 9K lock Grade 1 and what ANSI function number is the storeroom version?
Grade 1, listed by BHMA to A156.2 Series 4000, and the storeroom function is ANSI F86. That is the top commercial grade and the pairing an MRO or institutional spec usually calls for by name on a schedule. If your drawing says "F86 Grade 1 cylindrical", the 9K storeroom answers it directly.
5) Can I rekey BEST 9K locks myself across a building?
The 9K is built for an interchangeable core, so rekeying is pulling the core with a control key and dropping in a new one, no disassembly of the lock and no door off the frame. That is what makes it workable on a portfolio: one master keying scheme, and turnover on a unit or a storeroom is a thirty second core swap instead of a locksmith visit. It is a single cylinder keyed lock, so the key operates from the outside only.
6) The opening only needs a lever that always turns and never locks - is a storeroom lock the wrong part?
Yes. The BEST 9K storeroom function keys from the outside and keeps the outside lever permanently fixed, which is more lock than a corridor or closet door needs. For a Grade 1 heavy-duty passage lever, the Falcon K101 is a non-handed Grade 1 passage cylindrical lock fire rated for doors 1-3/8 to 2-1/4 inches, the Falcon T101 is a Grade 1 heavy-duty passage lever with pressure release technology, and the Corbin Russwin CL3110 is a Grade 1 vandal resistant passage/closet lever, fire rated, for doors 1-3/4 to 2 inches. All three stay at Grade 1 like the 9K while dropping the cylinder entirely.
7) The door needs to release on a fire alarm or card reader signal - can a mechanical storeroom lever do that?
No. The BEST 9K is a mechanical, non-electronic lock; it is operated by key and lever only and has no electrical connection. For an opening tied to an access control system, the Corbin Russwin CL33903 is a Grade 1 fail safe electrified cylindrical lever running on 12VAC/DC for doors 1-3/4 to 2 inches thick, offered with an NZ lever and D rose - the same D rose designation the 9K uses. Fail safe means the lever unlocks when power drops, the opposite of the 9K's permanently fixed outside lever.
8) Storeroom keeps staff locked out of a classroom - what keyed lever should be used instead?
The BEST 9K storeroom function never lets the outside lever be left unlocked, which is wrong for a room that must be opened up during class hours. Keyed alternatives with the right behavior are the Dexter C1000 Grade 1 classroom clutching lever and the Dexter C1000 Grade 1 classroom security lever, both for doors 1-3/8 to 1-3/4 inches thick, and the Cal-Royal AG03 classroom lever in the AG Series with a 6-pin Schlage C keyway keyed different and a 2-3/4 inch backset - the same 2-3/4 inch backset the 9K uses in its base configuration.
9) The office door needs to be lockable from inside by the occupant - is the 9K storeroom the right function?
No. On the BEST 9K storeroom lock the inside lever cannot be locked and is always unlocked, so an occupant has no way to secure the door from within the room. Entry/office function locks handle that instead: the Dexter C1000 entry/office is a Grade 1 clutching keyed lever for doors 1-3/8 to 1-3/4 inches, the Falcon B511CP6D is a Grade 2 medium-duty entry/office cylindrical lever, and the Hager 2525 is a Grade 2 commercial entry lever for doors 1-3/8 to 2 inches. The Dexter is the one that holds the 9K's Grade 1 rating.
10) For a patient room or utility closet that must not be lockable from inside, is a storeroom lock the correct choice?
Storeroom and asylum functions are not the same and the difference matters in behavioral health and institutional work. The BEST 9K storeroom keys the outside lever while the inside lever always retracts the latch freely. Asylum function locks key both sides so neither lever can be turned without a key: the Dexter C1000 asylum lock is Grade 1, F87 function, for doors 1-3/8 to 2 inches, and the Arrow MK33-BD-CS is a Grade 2 heavy-duty asylum lock with a ball knob and conventional cylinder in Schlage C keyway. Note the Arrow uses a knob rather than the 9K's lever, which matters where ADA lever operation is required.
11) Is lever trim for an exit device an alternative to a cylindrical storeroom lock?
They are different parts and not interchangeable. The BEST 9K is a complete cylindrical bored lockset with its own chassis, latch and strike. The Corbin Russwin 585F715 is Grade 1 lock lever trim for an ED8000 pushpad exit device, for doors 1-3/4 to 2 inches, and the Imperial USA ED-EL500HD is heavy duty escutcheon lever trim in entry function for the ED-500 Series - both mount to an exit device already on the door and do not latch on their own. If the door has a pushpad device, you want the trim; if it is a plain bored door prep, you want the cylindrical lockset.
12) Which storeroom-function lever suits a door thinner than 1-3/4 inches?
The BEST 9K standard door thickness range starts at 1-3/4 inches. For a thinner door in storeroom function, the Cal-Royal AG05 Grade 2 storeroom leverset with a deadlocking latchbolt covers 1-3/8 to 1-3/4 inches and the Hager 2580 Withnell Grade 2 storeroom lock covers 1-3/8 to 2 inches. Both give the same key-outside, always-fixed-outside-lever behavior as the 9K storeroom function, at Grade 2 rather than Grade 1.
13) Is a 9/16 inch latch throw enough to secure an exterior storeroom door?
The 9K uses a 9/16 inch throw latch, which is standard for a bored lockset and is what its matching 2-3/4 x 1-1/8 inch curved lip strike with box is cut for. That throw handles a normally hung door with a tight fit, but on an exterior opening where the door can be pried or where the frame has settled, a bored latch alone is not deadbolt security. Pair it with a separate deadbolt on that opening rather than relying on the latch throw.
14) What is the difference between the C rose and the D rose on a BEST 9K lock?
Rose size. The C rose is 3 inches convex, the D rose is 3-1/2 inches convex. The larger D rose gives you more coverage over the door face, which matters if you are replacing a lock that left a bigger footprint or scarring around the bore. The D rose also carries a locking pin design that resists the rose being twisted off under attack. On a matched building, pick whichever diameter the rest of your openings already carry so the doors look consistent.
15) What finish should I order to match existing hardware, and is there an antimicrobial option?
Twelve finishes are offered on the 9K: 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. The 626AM is the one to specify for healthcare and food service openings where a touched surface finish is part of the spec. 626 satin chrome is what most commercial buildings standardize on.
16) What lever styles come on the BEST 9K, and does the return matter?
Three lever styles: contour with angle return, curved with return, and curved without return. A return is the tail that curls back toward the door face, and it is what most facility codes and life safety reviewers look for so clothing or a lanyard cannot catch on an open lever end. On schools, healthcare and public buildings, take one of the two return levers. Curved without return is a look choice for openings where that is not a concern.
17) Is the BEST 9K storeroom lock heavy duty enough for a high traffic commercial door?
Built for it. The chassis is corrosion-treated steel with brass latch and critical components, rated heavy duty and commercial rather than residential. The through-bolt mounting studs at 12 and 6 o'clock add torque resistance for the abuse a lever takes on a busy opening, and the slotted key release cam keeps key access working even if the lock has been attacked. This is the specification for a corridor, stockroom or mechanical room door that gets used all day.
18) What else does ZenSupply carry in a Grade 1 storeroom cylindrical lever besides the BEST 9K?
For a straight Grade 1 cylindrical storeroom lever, the BEST 9K is the direct answer. If Grade 2 is acceptable on the opening, the Hager 2580 with the Withnell lever is a Grade 2 cylindrical storeroom lock fitting 1-3/8 to 2 inch doors, and the Cal-Royal AG05 is a Grade 2 storeroom lever with a deadlocking latchbolt for 1-3/8 to 1-3/4 inch doors. Both are lighter duty than the 9K and neither is interchangeable core, so they suit a one-off door rather than a keyed system you are trying to master key across a building.
19) Does a keypad lever set do the same job as a keyed storeroom lock?
They secure a door differently. The BEST 9K is a non-electronic single-cylinder keyed lock, so access is controlled by cutting and issuing keys. Code-entry alternatives include the Lockey 1150 heavy duty mechanical keypad lever with double combination in passage function for doors 1-1/8 to 2 inches, the Lockey 1150S keypad lever with adjustable backset over the same door thickness range, the Lockey 2835DC double combination mechanical keyless lever for doors 1-3/16 to 2 inches, the Delaney LP250 Grade 2 electronic keypad leverlock, and the Emtek Classic keypad leverset. The Lockey units are mechanical and need no power; the Delaney LP250 is electronic, where the 9K is specified as non-electronic.
20) Can a dummy lever be used on the inactive leaf of a pair where the other leaf takes a storeroom lock?
Yes, and it is the usual pairing. The BEST 9K storeroom lock carries a live latch with a 9/16 inch throw and a keyed cylinder; a dummy lever has no latch and no cylinder, so it fits the leaf that stays fixed. Dummy trim in the same lever family of products includes the Accentra 455LN Augusta, a Grade 1 heavy duty single dummy cylindrical lever, and the Callan Bentley Grade 2 dummy lever. For handed half-dummy trim the Baldwin Estate 5103 comes in left hand and right hand versions with the 5048 rose, which is worth noting because the 9K itself is non-handed.
21) Which lever locks are rated for lighter traffic than a heavy-duty commercial storeroom lock?
The BEST 9K is a heavy-duty commercial Grade 1 lock. Where the traffic is lighter - interior apartment doors, back-of-house rooms, light commercial - the alternatives step down in grade. Grade 2 options include the Accentra 5301LN Augusta passage lever in the 5300 Series, the Arrow GL01 Sierra passage lever for doors 1-3/4 to 2 inches, the Falcon B101 medium-duty non-handed passage lever, and the Hager 2510 Withnell passage lever for doors 1-3/8 to 2 inches. Grade 3 options include the Callan Artino entrance leverset, the Callan Asheville passage leverset in satin nickel, and the Kwikset 200BRNL Breton passage lever for doors 1-3/8 to 1-3/4 inches. None of these are keyed storeroom function, so they change what the door does as well as its duty rating.
22) A bathroom door needs a thumbturn lock, not a key - what replaces a storeroom lever there?
The BEST 9K is keyed with a single cylinder and has no inside thumbturn, so it does not suit a bed or bath door. Privacy function alternatives are the Hager 2540 Withnell Grade 2 privacy cylindrical lock for doors 1-3/8 to 2 inches, the Kwikset 300BRNL Breton Grade 3 privacy lever for doors 1-3/8 to 1-3/4 inches, the Baldwin Estate 5103 privacy lever with 5048 rose, and, if a knob is acceptable rather than a lever, the Arrow MK02-TA Tudor knob privacy lock, which is fire rated and non-keyed for doors 1-3/4 to 2 inches.
23) What Grade 1 lever locks are there for a door that is only 1-3/4 inches thick and does not need a key?
Several Grade 1 non-keyed levers cover that door. The Design Hardware X75 is a Grade 1 passage lever lockset with a flat lever for 1-3/4 inch doors, and the Corbin Russwin CL3110 is a Grade 1 vandal resistant passage/closet lever, fire rated, for doors 1-3/4 to 2 inches. Both hold the Grade 1 rating the BEST 9K carries under A156.2 Series 4000. The Design Hardware J75 is the same flat lever passage set at Grade 2 for a 1-3/4 inch door if Grade 1 is not required.
24) Can a Schlage-keyed lockset be worked into a keyway system built around interchangeable cores?
The BEST 9K is built for interchangeable cores, so it re-keys by pulling and swapping the core rather than repinning. Several alternatives ship in a fixed Schlage C keyway instead - the Cal-Royal AG00 entrance lever with a 6-pin Schlage C keyway keyed different on a 2-3/8 inch backset, the Cal-Royal AG03 classroom lever with the same 6-pin Schlage C keyway on a 2-3/4 inch backset, and the Arrow MK33-BD-CS asylum lock with a conventional cylinder in Schlage C. Where Yale hardware needs to run on a Schlage cylinder, the Accentra 107S is a Schlage cylinder adapter kit for Yale hardware.
25) What is a lost motion lever on the BEST 9K and when would I want it?
Lost motion lets the lever rotate about 45 degrees in either direction without engaging the retractor, so pulling down hard on a locked outside lever moves the handle instead of loading the chassis. It is an optional feature on the 9K and it is worth specifying on doors that take abuse, schools, dorms, public corridors, where a locked lever gets yanked on daily. On a low traffic back-of-house storeroom you do not need it.
26) Is a decorative residential lever an acceptable substitute on a commercial storeroom door?
They serve different openings. The BEST 9K is a commercial heavy-duty Grade 1 lock with a corrosion-treated steel chassis and through-bolt mounting. The decorative levers alongside it are residential-style trim: the Deltana 6201 Manchester, 6411 Morant and 6431 Linstead entry levers all cover doors 1-3/8 to 2 inches, the Deltana 5851 Claremont is an entry lever, and the Emtek Arts and Crafts and Hammered dummy pairs and the Emtek Cortina dummy pair carry no latch at all. Use those where appearance leads on a residential-style opening; use the 9K where a Grade 1 commercial storeroom function is specified.
How fast can I get the BEST 9K37D-14-D-S3-626 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 9K37D-14-D-S3-626 come with a warranty?
Absolutely. The BEST 9K37D-14-D-S3-626 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 9K37D-14-D-S3-626?
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 9K37D-14-D-S3-626 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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