Corbin Russwin CK4355 GRD 630 LC Grade 1 Classroom Lock

Corbin Russwin CK4355 GRD 630 LC Grade 1 Classroom Lock offers an exceptional combination of security, durability, and ease of use, making it an ideal choice for high-traffic environments such as schools, hospitals, and municipal buildings. This Grade 1 cylindrical lock features a traditional Global knob design and is non-handed, allowing for flexible installation on various door types. Crafted from satin stainless steel, the CK4355 lock is built to withstand the rigors of daily use. Its heavy wrought knobs are reinforced with steel for enhanced impact resistance, ensuring longevity in demanding settings. The lock accommodates door thicknesses ranging from 1-3/8" to 2" and includes a standard backset of 2-3/4". With a stainless steel latchbolt that boasts a 1/2" throw and a durable steel chassis zinc dichromated for corrosion resistance, this lock is designed for reliability under pressure. Additionally, the lock's ANSI/BHMA Grade 1 rating guarantees superior performance. This classroom lock is UL listed and fire-rated for 3 hours, providing peace of mind in safety-conscious environments. Choose the Corbin Russwin CK4355 for a dependable locking solution that combines style, security, and practicality.

Grade 1 Classroom Lock

Grade 1 Classroom Cylindrical Lock, Global Knob, Conventional Less Cylinder, Satin Stainless Steel Finish, Non-handed

The CK4300 Series is ideal for demanding, high-use commercial, industrial and institutional applications, including, Schools, Hotels, Hospitals and Nursing Homes, Churches, Municipal Buildings, Airports, Retail complexes, Offices and Warehouses.

A traditional knob with ANSI/BHMA Grade 1 reliability and durability.

The CK4300 Series is ideal for demanding, high-use commercial, industrial and institutional applications. It's heavy wrought knobs are lined with steel for impact resistance. 

• Handing Non-handed.
• Door Thickness 1-3/8" (35mm) – 2" (51mm).
• Backset 2-3/4" (70mm) standard.
• Lock Chassis Steel, zinc dichromated for corrosion resistance.
• Front Wrought brass or stainless steel, 2-1/4" (57mm) x 1-1/8" (29mm). Accommodates doors beveled 1/8" (3mm) in 2" (51mm).
• Latchbolt Stainless Steel 1/2" (13mm) throw, 7/8" (22mm) diameter.
• Strike Wrought brass 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
• Cylinder Brass, 6-pin, L4 keyway, 0-bitted standard.

Resources

• CK4300 Dummy Trim Installation Instructions
• CK4300 Installation Instructions
• CK4300 Series Cylindrical Lock Catalog
• CK4300 Series Grade 1 Cylindrical Knob Locks  Cut Sheet