Corbin Russwin CK4480 Communicating/Exit Cylindrical Lock - Grade 2, Global Knob, Non-Keyed

Corbin Russwin CK4480-NONKEYED Communicating/Exit Cylindrical Knobset - Grade 2, Non-Keyed, 1-3/8" to 1-3/4" Doors

Commercial-Grade Communicating/Exit Cylindrical Lock with Deadlocking Latchbolt

The Corbin Russwin CK4480-NONKEYED is a Grade 2 communicating/exit cylindrical knobset from the CK4400 Series, engineered for quality residential and light commercial applications including apartments, motels, and offices. This non-keyed lock features a deadlocking latchbolt operated by knob from the outside only, with a blank rose on the inside providing no inside operation. Designed for doors ranging from 1-3/8" to 1-3/4" in thickness with a 2-3/4" backset, it delivers an outstanding combination of value and performance in a non-handed configuration that simplifies installation.

Professional Features & Benefits

• Door Thickness Compatibility: Accommodates doors from 1-3/8" to 1-3/4" thick, making it suitable for a wide range of standard commercial and residential door constructions.
• Communicating/Exit Function: Deadlocking latchbolt operated by knob from the outside only; blank rose inside with no inside operation, ideal for communicating and exit door applications.
• Precision-Manufactured Mechanism: Zinc dichromated internal components provide corrosion resistance for long-term reliability in demanding environments.
• Stainless Steel Latchbolt: Stainless steel latchbolt construction ensures extended service life and consistent latching performance over time.
• Adjustable Latchbolt: Accommodates both flat and beveled doors for versatile installation across varied door preparations.
• Standard Latch & Strike Included: Comes with a 574F55 latch featuring a 2-3/4" backset, square corner front measuring 2-1/4" x 1-1/8", and an ANSI curved lip strike at 4-7/8" x 1-1/4" x 1-1/4" lip to center.
• Non-Handed Design: Non-handed configuration eliminates handing concerns during ordering and installation, reducing errors and simplifying inventory management.
• Stainless Steel Trim Available: Optional stainless steel trim provides additional finish durability for high-use environments.
• Manufacturer Warranty: Backed by a 3 Year Limited warranty for added confidence and protection.

Technical Specifications

• Subcategory: Cylindrical Locks
• Product Group: Mechanical Locks
• Series: CK4400 Series
• Grade: Grade 2
• Keyed Function: Non-Keyed
• Standard Latch: 574F55 - 2-3/4" Backset, Square corner front, 2-1/4" x 1-1/8"
• Standard Strike: ANSI Curved Lip 4-7/8" x 1-1/4" x 1-1/4" lip to center
• Warranty: 3 Year Limited
• ANSI/BHMA: F111
• Product Subgroup: Bored Locksets
• Product Type: Knobsets
• Keyed: No
• Fasteners: Wood and Machine Screws
• Commercial/Residential: Commercial
• Function Description: Deadlocking latchbolt by knob outside only. Blank rose inside, no inside operation.
• Lock Type: Cylindrical
• Handle Type: Knob
• Lock Function: Communicating/Exit
• Product Attribute: Cylindrical Locks
• Product Model: CK4480
• Product Function: Communicating/Exit
• Door Hand Direction: Non-Handed
• Door Thickness Range: 1-3/8" to 1-3/4"
• Product Category: Mechanical Locks
• Backset (Distance): 2-3/4"
• Department: Door Hardware

Professional Applications

• Commercial Office Buildings
• Apartment and Multi-Unit Residential Properties
• Motel and Hospitality Facilities
• Educational Facilities
• Healthcare Institutions
• Retail Establishments
• Light Commercial Buildings

Why Choose Corbin Russwin Quality?

Corbin Russwin CK4400 Series cylindrical locks deliver professional-grade reliability through precision-manufactured mechanisms with zinc dichromate corrosion resistance and stainless steel latchbolt construction for long service life. The CK4480-NONKEYED meets ANSI/BHMA F111 standards and is backed by a 3 Year Limited warranty, providing confidence for commercial and quality residential installations. Engineered for demanding applications where consistent communicating/exit function and dependable performance are essential.