Corbin Russwin CK4351 GRD 630 Grade 1 Entrance Lock

Corbin Russwin CK4351 GRD 630 Grade 1 Entrance Lock is a robust solution designed for high-traffic environments. This Grade 1 entrance/office cylindrical lock features a global knob and a conventional cylinder, all finished in a sleek satin stainless steel that enhances both durability and aesthetic appeal. Its non-handed design allows for versatile installation on doors ranging from 1-3/8" to 2" thick. Engineered for commercial, industrial, and institutional applications such as schools, hotels, and hospitals, the CK4300 Series excels in demanding settings. The heavy wrought knobs are reinforced with steel for superior impact resistance, ensuring long-lasting performance. With a 1/2" stainless steel latchbolt throw and a sturdy steel chassis that is zinc dichromated for corrosion resistance, this lock stands up to the rigors of daily use. The lock's ANSI/BHMA Grade 1 rating guarantees reliability, while the 6-pin brass cylinder offers enhanced security. The lock accommodates a standard 2-3/4" backset and is easy to install with wood or machine screws. Additionally, it comes with a 3-year limited warranty, making it a dependable choice for any professional seeking quality door hardware.

Grade 1 Entrance Lock

Grade 1 Entrance/Office Cylindrical Lock, Global Knob, Conventional 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