Stanley / BEST 8K30N 4D-S3-626 Grade 1 Passage Knob Set - D Convex Round Rose - Satin Chrome

The Stanley BEST 8K30N 4D-S3-626 is a Grade 1 heavy-duty cylindrical passage knob set from the 8K Series, configured with the D convex round rose, S3 curved-lip strike, and 626 Satin Chrome finish. Passage function means the latch is operated by rotating either knob without any locking capability, intended for closets, corridors, conference rooms, storage rooms, or any commercial opening that never needs to lock. ANSI/BHMA A156.2 Series 4000 Grade 1 certified, UL listed for 3-hour A-label single or double swinging fire doors, California State Fire Marshal listed. Chassis 2-1/16" diameter fits standard 2-1/8" door prep, 2-3/4" backset standard (3-3/4" and 5" available), 9/16" latch throw, adjustable for door thickness 1-3/8" to 2". Solid brass or bronze knob construction with brass or bronze rose reinforced by a steel liner. 

About the Stanley BEST Brand (and Why It's Now Dormakaba BEST)

Stanley Black & Decker acquired the BEST Access Systems division in 2002, which is why commercial locksmiths, facility managers, and spec writers have called this line "Stanley BEST" for the past two decades. In 2014, Stanley sold BEST to dormakaba (the parent company formed when Dorma and Kaba merged), and the brand is now technically "dormakaba BEST" in official manufacturer materials. The 8K Series product line itself hasn't changed: the same cylindrical lock platform, the same BEST Small Format IC (SFIC) keying ecosystem, the same Grade 1 ANSI certifications. If you're searching for "Stanley locksets" or "Stanley BEST," you're looking at the same product line now sold under the dormakaba umbrella. Most commercial and institutional buyers still use the "Stanley BEST" terminology out of habit, and this page ranks for both the legacy Stanley brand name and the current Best/dormakaba nomenclature because both are valid for this exact product.

8K30N 4D-S3-626 Model Decode

BEST's model naming packs every configuration detail into the SKU, so here's how to read 8K30N4DS3626:

• 8K = 8K Series, Grade 1 heavy-duty cylindrical

• 30 = Function code for Passage / Closet (ANSI F75, no locking function, latch operated by knob on both sides at all times)

• N = Knob style (N = standard knob; other codes cover different knob shapes)

• 4 = Housing/trim configuration

• D = D Rose style (D = convex round, 3-3/8" diameter; alternate rose styles include C and K)

• S3 = Strike type (S3 = 4-7/8" × 1-1/4" curved lip strike with box, ANSI A115.2; alternate strikes include S1, S2, S4)

• 626 = BHMA finish code 626 Satin Chrome (brushed/satin stainless look, most-specified commercial finish)

If you need a different configuration (different function, different rose, different finish), BEST offers the 8K Series across dozens of variations. Common alternates include 8K37 (Storeroom function, F86 ANSI), 8K38 (Classroom, F84), 8K70 (Entry/Office), 8K74 (Privacy, F76 bedroom/bathroom), and 8K32 (Institutional). For a lever-handle version of the same Grade 1 platform (ADA-compliant, which knobs are not), step up to the BEST 9K Series instead.

Full 8K30N Specifications

• Function: ANSI F75 Passage / Closet (both knobs always operate the latch, no locking)

• Grade: ANSI/BHMA A156.2 Series 4000 Grade 1 commercial heavy-duty

• Chassis: 2-1/16" diameter, fits standard 2-1/8" door prep

• Backset: 2-3/4" standard, 3-3/4" and 5" available at order

• Latch: 9/16" throw, 2-1/4" × 1-1/8" beveled front, fits 1" latch housing hole

• Knobs: D knob style, 2-7/8" diameter projection from door, machined solid brass or bronze

• Rose: D convex round, 3-3/8" diameter, brass or bronze reinforced with steel liner, threaded to chassis

• Door thickness: adjustable 1-3/8" to 2" standard

• Strike: S3 4-7/8" × 1-1/4" curved lip with box, ANSI A115.2

• Finish: 626 Satin Chrome (satin chromium plated, BHMA 626)

• Internal materials: brass or corrosion-treated steel

• Fire rating: UL listed for 3-hour A-label single or double swinging doors

• Other listings: California State Fire Marshal listed

• Packaging: lockset, strike, mounting hardware

When to Specify the 8K30N (Passage Function)

Passage knob sets go on doors that need a latch for positive closure but should never be locked. Standard commercial applications include coat closets, utility closets, janitor closets, corridor-to-corridor connector doors, stockrooms that are managed by a separate deadbolt, conference rooms that use card access instead, and any door where locking would create a life-safety code violation. Do not specify passage function for: any door that needs keyed entry (use 8K37 Storeroom or 8K70 Entry), any door that needs inside-thumbturn locking (use 8K74 Privacy for bedrooms/bathrooms), or any classroom door under a lockdown-capable function spec (use 8K38 Classroom or the current 8K38NX intruder-lockdown variant). One important code note: as of most current commercial building codes, interior office and classroom doors should use lever handles rather than knobs for ADA compliance- knob sets remain code-compliant on specific door types (closets, utility rooms) but are being phased out of general commercial new construction.

Alternative Grade 1 Passage Options

If the Stanley BEST 8K30N doesn't fit your budget or spec, three strong Grade 1 passage alternatives at different price points: the Corbin Russwin CK4310 Passage/Closet Cylindrical Lock (premium ASSA ABLOY, heaviest chassis), and the Arrow HK01 BB 32D Grade 1 Passage. For other functions within the Corbin Russwin CK4300 family that cross-references to 8K30/8K37/8K74, see the CK4320 Privacy, CK4332 Institutional, CK4351 Entrance/Office, CK4355 Classroom, and CK4357 Storeroom/Closet variants.