About this item
The BEST 8K30L 4A S3 626 is a heavy-duty commercial cylindrical privacy knob set from the BEST 8K Series Grade 1 platform, the institutional-spec line built for high-traffic privacy openings in hospitals, dormitories, behavioral health residential units, multi-family buildings, hotels, and any commercial environment that needs ANSI Grade 1 privacy function with emergency unlock capability. The full part number breaks down as: 8K (Grade 1 cylindrical knob lock series), 30 (function digit for privacy ANSI F76), L (knob style code), 4A (A rose round 3-3/8" diameter), S3 (4-7/8" curved-lip ANSI strike with box), 626 (satin chrome finish). This product is co-branded as Stanley/BEST on legacy spec sheets because BEST was a Stanley Black and Decker brand before dormakaba acquired it in 2018. The mechanical product is unchanged. 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. SKU 8K30L4AS3626. In stock under Cylindrical Knob Locks within Commercial Locks.
Is This the Right Stanley Door Knob for You?
Search results for "Stanley door knobs" return a mix of residential big-box hardware and commercial-grade Stanley/BEST locks. They are not the same product. This 8K30L is a Grade 1 commercial privacy knob set priced and built for institutional duty cycles measured in millions of operations. If the door is in a single-family home bathroom or bedroom and the budget is residential, this is not the lock; look at residential Stanley or Defiant lines instead. If the door is in a hospital patient bathroom, dormitory bathroom, behavioral health residential unit, hotel guest bathroom, multi-family apartment bathroom, or any commercial privacy opening that takes daily abuse, the 8K30L is exactly what spec writers reach for.
ANSI F76 Privacy Function with Emergency Unlock Explained
Function code F76 is the institutional privacy function and one of the most-specified ANSI cylindrical configurations on commercial bathroom and bedroom doors. The latch is operated by rotating the inside knob, or by rotating the outside knob only when the inside push button is out. The outside knob is locked by pushing the inside button. Crucially, the outside knob is unlocked by three different methods: rotating the outside slotted button (the emergency unlock), rotating the inside knob, or closing the door. The emergency slotted button is the safety differentiator and the reason F76 gets specified on institutional privacy applications. A staff member, parent, or first responder can insert a coin, flat screwdriver, or emergency tool into the slotted outside button to unlock the door in case of medical emergency, child entrapment, or behavioral health crisis. Without this capability, an occupant who has locked themselves in and become incapacitated cannot be reached without breaking the door. This is why every commercial code-compliant patient bathroom and residential institutional bathroom uses F76 instead of residential F19 (privacy without emergency unlock).
Specifications
Function: ANSI F76 privacy with emergency outside unlock. Chassis: 2-1/16" diameter, fits standard 2-1/8" cross-bore. Backset: 2-3/4" standard; 3-3/4" and 5" available. Latch: 9/16" throw, 2-1/4" x 1-1/8" beveled front, fits 1" edge bore. Knob: machined from solid brass or bronze, 2-7/8" projection from door face, L knob style. Rose: 4A convex round, 3-3/8" diameter, brass or bronze with steel reinforcement liner, threaded chassis attachment. Strike: S3 ANSI strike 4-7/8" x 1-1/4" with curved lip and box (ANSI A115.2). Door thickness: adjustable 1-3/8" to 2" standard. Internal parts: brass or corrosion-treated steel. Compliance: ANSI/BHMA A156.2 Series 4000 Grade 1, UL Listed for 3-hour A-label fire doors single or double swing, California State Fire Marshal Listed.
Where to Specify the 8K30L
Hospital patient bathrooms, ICU and patient room bathrooms, nursing home and assisted living unit bathrooms, behavioral health residential unit bathrooms (where ligature resistance is not specifically required; for ligature-resistant applications spec dedicated hardware), dental and medical office exam room privacy doors, dormitory and student housing bathrooms, hotel guest room bathrooms, multi-family apartment unit bathrooms, school nurse private rooms, government office single-occupancy restrooms, and any commercial privacy opening that needs ANSI Grade 1 inside-locking capability with code-compliant emergency outside unlock for staff intervention.
Where the 8K30L Sits in the BEST 8K Series
The 8K Series covers every common ANSI cylindrical function on the same Grade 1 chassis. The 8K30L is the privacy function. Sister functions include the BEST 8K37AB Entrance Knob Lock for ANSI F109 entrance/office. For Grade 2 medium-duty applications, see BEST 6K Series Grade 2. For mortise architecture, see BEST 45H Series. For matching levers in the same Grade 1 architecture, see BEST Lever Locks. For sister Grade 1 commercial privacy knob platforms in other brands, see Corbin Russwin CK4320 Grade 1 Privacy Knob Lock or Arrow HK02 Grade 1 Privacy Cylindrical Lock for value-tier alternatives.
Where This Sits in the Site Catalog
The 8K30L lives in the BEST 8K Series Grade 1 line under Cylindrical Knob Locks within Commercial Locks.
Trusted Since 2001
.svg)
