BEST 6K37R4CS3 Classroom Cylindrical Knob Lock

Grade 2 Classroom Cylindrical Lock, Round Knob, SFIC Less Core, Non-handed

Function: Classroom (R) ANSI # F84
• Latch operated by rotating inside knob, turning key in outside knob when outside knob is locked or rotating outside knob
  when not locked
• Outside knob is locked and unlocked by turning key in outside knob
• Inside knob is always unlocked

6K Series – Features:
• Quick rekeying by BEST interchangeable core.
• Snap-on inside rose (no exposed mounting screws).
• Threaded outside rose adjustable for door thickness.
• Keyed knob is removable only after removal of core.
• Internal steel mechanisms are corrosion treated for normal atmospheric conditions.
• Lockset reversible for either hand of door without removing keyed knob.
• Underwriters Laboratories®: 6K series – Listed by Underwriters Laboratories for use on 3 Hr, A label for single (4' x 8') doors.
• Builders Hardware Manufacturers Association: 6K series – Listed by BHMA for A156.2, Series 4000, Grade 2.

Specifications:

Backset: 2-3/4" 

Case: 2-1/16" Dia. cylindrical, for 2-1/8" hole.

Finish: Standard finishes are 605, 606, 611, 612, 613, 625, 626.

Interchangeable core: Solid brass, pin-tumbler type in knob with 7-pin core (Not included).

Knobs: 2-1/8" Dia. round.

Latch: 1/2" throw deadlocking latch. 

Lock and latchsets: Sets consist of latch complete with trim. Type and operation according to set number. 

Material: Component parts include brass or bronze. Internal parts are brass or zinc dichromate steel.

Mounting: 2 1/8" Dia. bore for lock housing, 1" Dia. or 7/8" Dia. for latch tube.

Options: KNL– Knurl keyed knob, L8– drive in-latch.

Roses: C– 2-9/16" Dia. D– 3-3/8" Dia. Mounting screws concealed.

Strike: S3– 4-7/8" x 1-1/4" with curved lip and box (ANSI A115.2 for 1-3/4" doors).

Thickness of doors: 1-3/8" to 1-7/8" Standard. If thickness is greater, use our heavy duty locksets for specified door thickness.