Corbin Russwin CK4355 Classroom Cylindrical Lock - Grade 1, Global Knob, Keyed

Corbin Russwin CK4355-KEYED Classroom Cylindrical Lock Grade 1 with Global Knob, Keyed Single Cylinder

Heavy-Duty Commercial Classroom Lock for High-Traffic Institutional Applications

The Corbin Russwin CK4355-KEYED is a Grade 1 classroom cylindrical lock from the CK4300 Series, engineered for demanding commercial, industrial, and institutional environments. This keyed single-cylinder knobset features a deadlocking latchbolt operable by knob from either side, except when the outside knob is locked by key — the inside knob remains always free for safe egress. Designed to fit door thicknesses from 1-3/8" to 2" with a 2-3/4" backset, it includes a conventional 6-pin cylinder and two nickel silver keys. Heavy wrought knobs are lined with steel for impact resistance, and internal parts are zinc dichromate plated for corrosion resistance, making this lock a reliable choice for schools, hospitals, hotels, and other high-use facilities.

Professional Features & Benefits

• Door Thickness Compatibility: Accommodates door thicknesses from 1-3/8" to 2", providing versatile fit across a wide range of commercial door applications.
• Precise Backset: Standard 2-3/4" backset with a 787F66 deadlocking latch featuring a square corner front measuring 2-1/4" x 1-1/8" universal configuration for reliable latching performance.
• ANSI Curved Lip Strike Included: Comes with an ANSI curved lip strike measuring 4-7/8" x 1-1/4" x 1-1/4" lip to center for secure and code-compliant door frame engagement.
• Impact-Resistant Heavy Wrought Knobs: Steel-lined heavy wrought knobs deliver exceptional durability and impact resistance for high-traffic institutional and commercial environments.
• Corrosion-Resistant Internal Components: Internal parts are zinc dichromate plated to resist corrosion, extending service life in demanding applications.
• 1/2" Stainless Steel Throw Latchbolt: Features a 1/2" (13mm) stainless steel throw latchbolt for dependable deadlocking performance and long-term durability.
• Conventional 6-Pin Cylinder: Includes a conventional 6-pin cylinder with two nickel silver keys for reliable keying and key control compatibility.
• Non-Handed Design: Non-handed configuration simplifies installation and reduces inventory requirements for facilities managers and contractors.
• Manufacturer Warranty: Backed by a 3-year manufacturer warranty for added confidence and protection.

Technical Specifications

• Subcategory: Cylindrical Locks
• Product Group: Mechanical Locks
• Series: CK4300 Series
• Grade: Grade 1
• Keyed Function: Single Cylinder
• Standard Latch: 787F66 - Deadlocking 2-3/4" Backset, Square corner front, 2-1/4" x 1-1/8" universal
• Standard Strike: ANSI Curved Lip 4-7/8" x 1-1/4" x 1-1/4" lip to center
• Warranty: 3 Year
• ANSI/BHMA: F84
• Product Subgroup: Bored Locksets
• Product Type: Knobsets
• Keyed: Yes
• Fasteners: Wood and Machine Screws
• Commercial/Residential: Commercial
• Function Description: Deadlocking latchbolt by knob either side, except when key outside locks outside knob. Outside knob unlocked by key outside
• Lock Type: Cylindrical
• Handle Type: Knob
• Lock Function: Classroom
• Product Attribute: Cylindrical Locks
• Product Model: CK4355
• Product Function: Classroom
• Door Hand Direction: Non-Handed
• Door Thickness Range: 1-3/8" to 2"
• Product Category: Mechanical Locks
• Backset (Distance): 2-3/4"
• Department: Door Hardware

Professional Applications

• Schools and Educational Facilities
• Hospitals and Nursing Homes
• Hotels and Hospitality Properties
• Apartment and Multi-Tenant Residential Buildings
• Municipal and Government Buildings
• Airports and Transportation Facilities
• Retail Complexes and Commercial Offices
• Churches and Institutional Facilities
• Industrial and Warehouse Environments

Why Choose Corbin Russwin Quality?

Corbin Russwin CK4300 Series cylindrical locks deliver professional-grade reliability with heavy wrought steel-lined knobs, zinc dichromate-plated internal components for corrosion resistance, and a 1/2" (13mm) stainless steel throw latchbolt built for long-term performance. The CK4355-KEYED meets Grade 1 commercial standards and ANSI/BHMA F84 classification, and is backed by a 3-year manufacturer warranty. Engineered for demanding commercial applications — from schools and hospitals to airports and warehouses — where dependable classroom security is essential.