BEST 9K37D Grade 1 Storeroom Lever Lock

The BEST 9K37D is the storeroom function variant in BEST's flagship 9K Series Grade 1 heavy-duty cylindrical lever lock line. ANSI F86 storeroom function: outside lever always fixed (key required to retract latch), inside lever always free for fire code egress. Extra heavy-duty chassis with brass or corrosion-treated steel critical components, hardened steel outside lever sleeve, torque-resistant rose locking pin, and through-bolt mounting for maximum attack resistance. Accepts Best SFIC (Small Format Interchangeable Core) and Arrow/Falcon SFIC compatibles. Available in 4 lever styles, 4 rose styles, and multiple finishes. $597.86 (save $499.14 off $1,097 list) with same-day shipping. SKU 9K37D.

What Is the BEST 9K37D Storeroom Lever Lock

BEST Access Systems (founded in 1921 as Best Lock Corporation in Indianapolis, acquired by Stanley Security in 2001, now part of dormakaba since the 2019 acquisition) builds three primary Grade 1 cylindrical lock families: the 9K Series (lever, Grade 1 heavy-duty), the 8K Series (knob, Grade 1), and the 6K Series (knob or lever, Grade 2 standard duty). The 9K37D sits at the top of the lever lineup as the storeroom function model, specified for openings where the door must lock behind the user automatically storage rooms, IT closets, mechanical rooms, stockrooms, janitor closets, pharmacy dispensaries, secure supply areas, and any opening where a key is required every single time someone enters but egress must always be free. Meets ANSI/BHMA A156.2 Grade 1 and is typically spec'd in Division 08 71 00 hardware schedules for K-12 schools, universities, hospitals, government buildings, and multi-tenant commercial properties.

BEST 9K37D Specifications

Full specs for the door schedule:

• Function: ANSI F86 Storeroom (outside lever always fixed, key retracts latch, inside lever always free)

• Grade: ANSI/BHMA A156.2 Grade 1 heavy duty

• Series: BEST 9K Series Grade 1 cylindrical lever

• Chassis: brass or corrosion-treated steel critical components, 2-1/16" diameter fits 2-1/8" bore (conforms to ANSI A115.2)

• Backset: 2-3/4" standard, 3-3/4" available

• Door thickness: 1-3/4" to 2-1/4" standard, spacers available for 1-3/8"

• Lever handles: high-quality zinc alloy with brass or bronze trim components, 5/8" diameter body, 4-3/4" handle length from chassis centerline

• Lever styles: 14, 15, 16 (all three conform to Illinois Accessibility Standard; #14 and #15 additionally conform to California Administrative Code Title 19 and Title 24)

• Rose styles: C (3" Convex), D (3-1/2" Convex), K (3" Convex no ring), L (3-1/2" Convex no ring)

• Finishes: 605 (US3) Bright Brass, 612 (US10) Satin Bronze, 613 (US10B) Oil Rubbed Bronze, 626 (US26D) Satin Chrome

• Mounting: through-bolts required at 12 and 6 o'clock positions, 5/16" diameter holes (drill jig available for accuracy)

• Projection on door: approximately 2-3/4" when mounted on 1-3/4" door

• Strike: S3, 4-7/8" x 1-1/4" with curved lip (conforms to ANSI A115.2 for 1-3/4" doors)

• Core: accepts Best SFIC and Arrow/Falcon SFIC compatibles (core sold separately), or add Arrow/Falcon combinated SFIC for +$29.50

Model Number Breakdown (9K37D Decoded)

BEST 9K model numbers follow a strict positional convention that makes the entire family searchable once you know the pattern: 9K is the series, 37 is the 7-pin BEST keyway profile with 2-3/4" backset, D is the function code (D = Storeroom / F86). The rest of the SKU stacks function-specific suffixes: lever style (14, 15, or 16) + rose style (C, D, K, or L) + strike (S3) + finish (605, 612, 613, or 626). So a full SKU like 9K37D14DS3626 reads as: 9K Series, 7-pin keyway with 2-3/4" backset, Storeroom function, #14 lever, D rose, S3 strike, Satin Chrome. The "9K3" partial query captures this entire family of SKUs across functions: 9K37D (storeroom, this product), 9K37R (classroom), 9K37L (entry/office), 9K37N (passage), 9K37AB (entry double cylinder), 9K30D (standard backset storeroom), and more. If you're looking at a different function and landed here, you can reach the full BEST 9K Series Grade 1 category for all variants.

BEST 9K Series vs 6K vs 8K (Which Grade Fits Your Project)

BEST builds three commercial cylindrical lock families with different grades and use cases. The 9K Series (this product) is Grade 1 heavy-duty with a lever, 4 million cycle rating, spec'd for high-traffic institutional doors. The BEST 8K Series Grade 1 is also Grade 1 but knob instead of lever, used when ADA compliance isn't required or where a knob is the owner's aesthetic preference. The BEST 6K Series Grade 2 is standard duty for light to medium traffic (apartments, interior office doors, hotel back-of-house) at about a third the price. Rule of thumb: exterior doors, fire-rated openings, and ADA-required doors get the 9K. Interior service doors and non-rated residential-style openings often take 6K to hit the budget. All three families accept the same Best SFIC cores, so you can key them identically across a single master system.

Configure Your 9K37D (Lever, Rose, Finish, Core)

Build the exact SKU you need using the dropdown selectors. Choose your lever (14, 15, or 16 all three are ADA-compliant under the Illinois Accessibility Standard; 14 and 15 also meet California Title 19 and Title 24). Pick your rose (C or K are 3" round, D or L are 3-1/2" round; the K and L remove the decorative ring for a cleaner look). Select finish (626 Satin Chrome is the most common for institutional specs; 613 Oil Rubbed Bronze for executive and hospitality applications). Core option defaults to accepting Best SFIC cores (core not included so your locksmith can key to an existing master system). Upgrade to a pre-combinated Arrow or Falcon SFIC for +$29.50 if you don't need master key integration. For the Best IC Core separately, see our companion category. For key blanks and master keying supplies, see Best Key Blanks.

Where to Buy the BEST 9K37D

We've stocked BEST commercial hardware since 2001, and the 9K37D ships the same day from the full BEST 9K Series Grade 1 lineup within our broader BEST Lever Locks category. For broader evaluation against other Grade 1 lever options (TownSteel, Schlage L Series, Sargent, Marks Survivor), see the full Cylindrical Lever Locks category.