Corbin Russwin CK4455 Classroom Knob. An outstanding combination of value and performance. Ideal for quality residential and light commercial buildings, such as:
- Fine homes
- Apartments
- Motels
- Offices
Corbin Russwin CK4455 Classroom:
- Deadlocking latchbolt by knob either side except when key outside locks outside knob.
- Outside knob unlocked by key outside.
- Inside knob always free.
Advantages
- Wide array of functions
- Precision manufactured mechanisms, zinc dichromated for corrosion resistance
- Stainless steel latchbolt for long life
- Adjustable latchbolts accommodates flat and beveled doors
- Stainless steel trim available
Features Handing Field reversible.
Door Thickness 1-3/8" (35mm) - 1-3/4" (44mm) standard.
Backset 2-3/4" (70mm) standard.
Optional: 2-3/8" (60mm), 3-3/4" (95mm) and 5" (127mm); see How to Order, page 9.
Lock Chassis Steel, zinc dichromated for corrosion resistance. Front Wrought brass, bronze, or stainless steel, 2-1/4" (57mm) x 1-1/8" (29mm) standard.
Accommodates flat doors and doors beveled 1/8" (3mm) in 2" (51mm).
Optional fronts available; see How to Order, page 9. Latchbolt Brass or stainless steel, 1/2" (13mm) throw.
Auxiliary Latchbolt Deadlocking latchbolt prevents manipulation when door is closed. Strike Wrought brass, bronze, or stainless steel ANSI curved lip standard, 4-7/8" (124mm) x 1-1/4" (32mm) x 1-1/4" (32mm) lip to center.
Optional strikes, lip lengths and ANSI wrought strike box available; see How to Order, page 9.
Cylinder Brass, 6-pin L4 keyway, 0-bitted standard. Keying Features Available Master keying Construction master keying Keys Two nickel silver standard. Warranty One-year limited.
Certification/Compliance ANSI/BHMA Certified and meets A156.2 Series 4000, Grade 2. Federal Meets FF-H-106C. UL-cUL UL/ULC All locks with listed for A label and lesser class single doors, 4' x 8'. Letter F and UL symbol on latch front indicate listing.
Any retrofit or other field modification to a fire-rated opening can potentially impact the fire rating of the opening, and Corbin Russwin, Inc. makes no representations or warranties concerning what such impact may be in any specific situation.
When retrofitting any portion of an existing firerated opening, or specifying and installing a new fire-rated opening, please consult with a code specialist or local code official (Authority Having Jurisdiction) to ensure compliance with all applicable codes and ratingsAvailable Finishes
Click on a swatch to view finish on hardware.
|
BHMA 605 |
Bright Brass |
 |
|
BHMA 612 |
Satin Bronze |
 |
|
BHMA 613 |
Dark Oxidized Satin Bronze, Oil Rubbed |
 |
| BHMA 629 | Bright Stainless Steel |  |
| BHMA 630 | Satin Stainless Steel |  |
Trim
| Belmont |  |
| Global |  |
- Wide array of functions
- Precision manufactured mechanisms, zinc dichromated for corrosion resistance
- Stainless steel latchbolt for long life
- Adjustable latchbolts accommodates flat and beveled doors
- Stainless steel trim available