Corbin Russwin CK4430 Privacy, Bedroom or Bathroom Cylindrical Lock - Grade 2, Global Knob, Non-Keyed

Corbin Russwin CK4430-NONKEYED Privacy Cylindrical Knobset - Grade 2, Non-Handed, 1-3/8" to 1-3/4" Door Thickness

Commercial-Grade Privacy Lock for Residential and Light Commercial Applications

The Corbin Russwin CK4430-NONKEYED is a Grade 2 privacy cylindrical knobset from the CK4400 Series, engineered for bedroom, bathroom, and privacy applications in quality residential and light commercial settings. This non-keyed lockset features a deadlocking latchbolt operable by knob from either side, with outside knob locking via push button and unlocking by turning the slotted button outside, rotating the inside knob, or closing the door. Designed for doors ranging from 1-3/8" to 1-3/4" in thickness with a 2-3/4" backset, the CK4430 delivers an outstanding combination of value and performance with precision-manufactured mechanisms zinc dichromated for corrosion resistance and a stainless steel latchbolt for long service life.

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 residential and light commercial door constructions.
• Precise Backset Dimension: Standard 2-3/4" backset with a 574F55 latch featuring a square corner front measuring 2-1/4" x 1-1/8" for accurate, consistent installation.
• ANSI Curved Lip Strike Included: Ships with an ANSI curved lip strike measuring 4-7/8" x 1-1/4" x 1-1/4" lip to center for a secure, code-compliant door frame interface.
• Privacy Function Operation: Deadlocking latchbolt operable by knob from either side; outside knob locks via push button and unlocks by turning the slotted exterior button, rotating the inside knob, or closing the door — inside knob always remains free for safe egress.
• Corrosion-Resistant Mechanisms: Precision-manufactured internal mechanisms are zinc dichromated for enhanced corrosion resistance, ensuring long-term reliability in demanding environments.
• Stainless Steel Latchbolt: Durable stainless steel latchbolt provides extended service life, while the adjustable latchbolt design accommodates both flat and beveled door edges.
• Non-Handed Design: Non-handed configuration simplifies ordering and installation, eliminating the need to specify door handing for this lockset.
• Manufacturer Warranty: Backed by a 3-year warranty for added confidence and protection in commercial and residential installations.

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
• ANSI/BHMA: F76A
• Product Subgroup: Bored Locksets
• Product Type: Knobsets
• Keyed: No
• Fasteners: Wood and Machine Screws
• Commercial/Residential: Commercial
• Function Description: Deadlocking latchbolt by knob either side. Outside knob locked by push button. Outside knob unlocked by turning slotted button outside, by rotating inside knob, or by closing door.
• Lock Type: Cylindrical
• Handle Type: Knob
• Lock Function: Privacy/Bed/Bath
• Product Attribute: Cylindrical Locks
• Product Model: CK4430
• Product Function: Privacy/Bed/Bath
• 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

Installation & Operation

1. Review manufacturer specifications and verify door preparation requirements including door thickness (1-3/8" to 1-3/4"), stile width, and confirm non-handed orientation as applicable to this product.
2. Use manufacturer-provided templates to mark mounting hole locations accurately on the door face and edge for the cylindrical bore and latch pocket.
3. Prepare the door by drilling the required cylindrical bore hole and edge bore, then chisel the latch pocket to accept the 2-1/4" x 1-1/8" square corner front latch plate.
4. Install the latch assembly with the 2-3/4" backset, then mount the exterior and interior knob assemblies and secure with the provided wood and machine screws per manufacturer torque specifications.
5. Install the ANSI curved lip strike (4-7/8" x 1-1/4" x 1-1/4" lip to center) on the door frame, mortising as required for flush fit.
6. Test privacy function: verify outside knob locks via push button, unlocks by slotted exterior button, inside knob rotation, or door closing, and that inside knob remains free at all times. Refer to manufacturer documentation for complete installation details and troubleshooting.

Professional Applications

• Residential Bedroom and Bathroom Doors
• Fine Homes and Luxury Residences
• Apartment and Multi-Unit Residential Properties
• Motel and Hospitality Guest Room Bathrooms
• Light Commercial Office Privacy Rooms
• Healthcare Facility Restrooms and Exam Rooms
• Educational Facility Restroom and Staff Room Doors

Why Choose Corbin Russwin Quality?

Corbin Russwin CK4400 Series cylindrical locksets are precision manufactured with zinc dichromated internal mechanisms for corrosion resistance and stainless steel latchbolts for extended service life, delivering an outstanding combination of value and performance in Grade 2 commercial applications. The CK4430 is backed by a 3-year manufacturer warranty and meets ANSI/BHMA F76A standards, providing verified quality assurance for installers and building owners alike. Engineered for demanding residential and light commercial environments where dependable privacy function and long-term durability are essential.