Corbin Russwin CK4430 Privacy,...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$288.77
$154.84
Corbin Russwin Corbin Russwin CK4430 Privacy, Bedroom or Bathroom Cylindrical Lock - Grade 2, Global Knob, Non-Keyed COR-CK4430-NONKEYED

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

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Model: CK4430 GWC 629
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$288.77
$154.84
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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.

Manufacturer Resources

Corbin Russwin Condensed Catalog

Product Specs

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

Corbin Russwin CK4430 GWC 629 – Frequently Asked Questions

1) What else can I use instead of the Corbin Russwin CK4430 privacy knob?
For a like-for-like Grade 2 cylindrical privacy knob, the Dexter C2000 Series privacy ball knob covers the same 1-3/8 to 1-3/4 inch door thickness. Stepping down in duty, the Cal-Royal BER20 and the Pamex FTF Baron are Grade 3 privacy knobs on the same door range, which suits light residential traffic. On the decorative side, the Deltana 6112 St. Thomas privacy knob takes doors from 1-3/8 to 2 inches. The CK4430 stays the pick where a Grade 2 commercial spec is called for.
2) Does the CK4430 knobset use a 2-3/4 inch backset, and will it drop into a door already bored for a residential lock?
The backset is 2-3/4 inches, which is the commercial standard, not the 2-3/8 inch backset most residential doors are bored for. If the existing bore on your door is at 2-3/8, the latch face will not line up. Check the distance from the door edge to the center of the 2-1/8 inch bore before you order. The latch supplied is the 574F55 with a square corner front measuring 2-1/4 x 1-1/8 inches.
3) How does the privacy function on the Corbin Russwin CK4430 unlock in an emergency?
Push button on the inside locks the outside knob. Three things release it: turning the slotted button on the outside face of the knob with a coin or screwdriver, rotating the inside knob, or simply closing the door. The inside knob is never locked, so egress from a bathroom or bedroom is always free, and staff can get in from the corridor without a key.
4) Does the CK4430 come with a strike, or do I have to order one separately?
An ANSI curved lip strike ships with the lock, 4-7/8 x 1-1/4 inches with 1-1/4 inch lip to center. That is the full-size ANSI strike, so a frame already prepped for a T-strike or a small round-corner residential strike will need the mortise opened up. Wood and machine screws are included, which covers both wood doors and hollow metal.
5) What is the closest equivalent to a Corbin Russwin CK4430 privacy knob from another brand?
The Dexter C2000 Series privacy cylindrical ball knob lock is the nearest match. Both are Grade 2 privacy/bed/bath cylindrical knob locks, both are non-keyed, and both fit doors 1-3/8 inch to 1-3/4 inch thick. The CK4430 uses a 2-3/4 inch backset and ships with a 574F55 latch and an ANSI curved lip strike 4-7/8 inch x 1-1/4 inch with 1-1/4 inch lip to center. The Dexter is described as a ball knob and non-clutching, so the knob shape and the trim appearance differ from the Corbin Russwin Global knob.
6) The door is thicker than 1-3/4 inches - what privacy knob works instead of the CK4430?
The CK4430 is rated for doors 1-3/8 inch to 1-3/4 inch thick. For a thicker door, the Deltana 6112 St. Thomas privacy knob covers 1-3/8 inch to 2 inch. Confirm the actual measured thickness at the lock stile before ordering, since the extra range is the whole reason to switch.
7) What should I use if the door needs to latch but not lock, instead of the CK4430?
The CK4430 is a privacy function: the outside knob locks by push button and unlocks by turning the slotted button outside, by rotating the inside knob, or by closing the door. If no locking is wanted, a passage function is the right part. The Dexter C2000 passage ball knob is Grade 2 for doors 1-3/8 inch to 1-3/4 inch, the Falcon W101 is a Grade 2 medium duty passage/closet knob lock with a 2-3/4 inch backset and a fire rating, and the Arrow MK01 is a Grade 2 non-keyed passage knob lock for the same 1-3/8 inch to 1-3/4 inch doors.
8) Do I have to specify left or right hand when ordering a CK4430 privacy knob?
No handing to specify. The CK4430 is non-handed, and the latchbolt adjusts to suit either a flat or a beveled door edge, so one part number works on every door in a corridor regardless of swing. That is the reason property managers standardize on it across a floor of bedroom and bath doors.
9) What ANSI/BHMA function and grade is the Corbin Russwin CK4430?
Grade 2, ANSI/BHMA function F76A, which is the bed and bath privacy function for a cylindrical bored lock. For a spec writer, that pair of designations is what you put on the schedule: F76A settles the operation, Grade 2 settles the duty level for residential and light commercial openings.
10) Can I key the CK4430 to my building master key system?
No. The CK4430 is a non-keyed privacy lock, with a push button and slotted emergency release instead of a cylinder, so it takes no key and cannot go on a master system. Where you need a keyed opening in the same knob style, look at a keyed entrance or storeroom function instead, such as the Sargent 6G04 Grade 2 storeroom knob lock with a single cylinder.
11) What is the difference between a privacy knob and a passage knob for a bathroom door?
A privacy lock like the CK4430 latches and locks from the inside by push button, with an emergency release outside. A passage set has no lock at all, just a latch, and is for halls and closets. If somebody needs to close themselves in, you want the privacy function. If the door only needs to stay shut, a passage set such as the Arrow MK01 Grade 2 non-keyed knob is what you want, and it covers the same 1-3/8 to 1-3/4 inch door range.
12) Is a Grade 2 knob lock enough for apartment bathrooms and hospitality guest rooms, or should I be looking at Grade 1?
Grade 2 is the normal call for bedroom and bath privacy doors in apartments, hotels and light commercial offices, where the door is used often but not abused. Grade 1 is the heavy duty tier for high traffic openings. If a particular door is taking institutional traffic, the Grade 1 alternatives in knob format are keyed or passage functions, such as the Falcon X101 Grade 1 passage knobset or the BEST 8K Series Grade 1 entrance knob, not privacy. For the privacy openings themselves, the CK4430 at Grade 2 with its stainless latchbolt is the right tier.
13) Is there a lighter-duty privacy knob than the Corbin Russwin CK4430 for a low-traffic interior door?
Two Grade 3 privacy knob locks cover lighter interior duty. The Cal-Royal BER20 is a Grade 3 privacy knob lock with brass trim for doors 1-3/8 inch to 1-3/4 inch, and the Pamex FTF Baron is a Grade 3 privacy knob lockset for the same 1-3/8 inch to 1-3/4 inch range. The CK4430 is Grade 2 and meets ANSI/BHMA F76A. All three cover the same door thickness range, so the decision is the cycle grade you want behind a bedroom or bath door rather than the door prep.
14) Does a dummy knob work in place of a Corbin Russwin CK4430?
No. A dummy knob has no latch and no locking mechanism, so it will not hold a bathroom or bedroom door closed. The CK4430 has a deadlocking latchbolt operable by knob from either side with push-button locking on the outside knob. The Schlage A170 single dummy trim, the BEST 6K single dummy trim, and the Cal-Royal BA40 dummy knob are all dummy function and belong on a fixed or inactive leaf, not on the privacy door.
15) What is the heavier-duty alternative to the CK4430 for a high-traffic door?
The CK4430 is Grade 2 and non-keyed for privacy service. For heavier traffic, Grade 1 cylindrical knob locks in the set include the Schlage D10S passage latch, a heavy duty Grade 1 non-keyed knob lock with an Orbit knob, and the Falcon X101, a heavy duty Grade 1 cylindrical passage knobset with an interchangeable core for doors 1-3/8 inch to 2-1/4 inch. Both are passage function, so they latch without locking; the privacy push button of the CK4430 has no equivalent on either.
16) Can I put a CK4430 on an office or entry door that needs a key?
No - the CK4430 is non-keyed and takes no cylinder. For a keyed opening in the same cylindrical knob prep, the Dexter C2000 entry/office knob lock is Grade 2 and keyed for doors 1-3/8 inch to 1-3/4 inch, the Sargent 6G04 is a Grade 2 single cylinder storeroom/closet knob lock, and the BEST 8K Series is a Grade 1 heavy duty single cylinder entrance knob lock.
17) I need a decorative privacy knob rather than a commercial one - what else is there?
The CK4430 is a commercial Grade 2 privacy knobset built around a stainless steel latchbolt and zinc dichromated internal mechanisms. For a decorative interior look with the same privacy function, the Baldwin Estate 5077 Bethpage privacy knob uses an R027 rose, the Baldwin Estate 5000 Baltimore privacy knob has a 5148 rose with a 2-3/8 inch backset and full lip strike, and the Deltana 6112 St. Thomas is a privacy knob for doors up to 2 inch. Note the Baldwin 5000 backset is 2-3/8 inch against the 2-3/4 inch backset of the CK4430, so an existing bore may not line up.
18) What privacy or classroom option should I look at for a school or exam room instead of a privacy knob?
Where staff need key control over a room the CK4430 cannot provide - it is non-keyed privacy with a push button - the Dexter C2000 classroom knob lock is a Grade 2 keyed classroom function for doors 1-3/8 inch to 1-3/4 inch, and the Sargent 8XG04 is a Grade 1 heavy duty storeroom/closet knob lock with a 2-3/4 inch backset matching the CK4430 bore dimension.
19) What finish does the Corbin Russwin CK4430 privacy knobset come in?
629, bright stainless steel, is the finish offered on the CK4430. That is a mirror-polished stainless, which reads brighter than the satin 630 you see on most commercial openings, so if you are matching existing hardware on a run of doors, confirm what is already there before you standardize.
20) Will the CK4430 hold up in a coastal or high humidity building?
The internal mechanism is zinc dichromated for corrosion resistance and the latchbolt is stainless steel, and the knob itself is bright stainless. That combination is why it gets specified for hotel and healthcare restrooms, where the hardware sits in damp air all day.
21) Is exit device knob trim a substitute for a CK4430 knobset?
No. The Sargent 28C-KNOB is exit device trim with a knob and rose for 1-3/4 inch doors, and the Imperial USA ED-BKL580 is knob trim with a storeroom function - both are outside trim that mounts to an exit device, not a standalone lock. The Sargent 78-2875 is an outside knob only. The CK4430 is a complete cylindrical knobset with its own latch and strike for a standard bored door prep.
How fast can I get the Corbin Russwin CK4430 GWC 629 delivered?
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Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Corbin Russwin CK4430 GWC 629 come with a warranty?
Absolutely. The Corbin Russwin CK4430 GWC 629 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Corbin Russwin CK4430 GWC 629?
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