Corbin Russwin CK4357 GRD 630 Grade 1 Storeroom Lock

Corbin Russwin CK4357 GRD 630 Grade 1 Storeroom Lock offers unparalleled security and durability for high-use environments. This Grade 1 storeroom/closet cylindrical lock features a global knob design and a conventional cylinder, all finished in a sleek satin stainless steel that not only enhances aesthetics but also ensures long-lasting corrosion resistance. Designed for demanding commercial, industrial, and institutional applications-such as schools, hospitals, airports, and retail complexes-the CK4300 Series stands out for its reliability. The heavy wrought knobs are reinforced with steel, providing excellent impact resistance. This non-handed lock accommodates doors with a thickness ranging from 1-3/8" to 2" and comes with a standard backset of 2-3/4". The lock chassis is crafted from steel and zinc dichromated, while the latchbolt features a stainless steel throw of 1/2" and a 7/8" diameter. It includes a 6-pin brass cylinder with an L4 keyway, ensuring secure access control. With a fire rating of 3 hours and compliance with ANSI/BHMA standards, this storeroom lock ensures safety and peace of mind. Backed by a 3-year limited warranty, the Corbin Russwin CK4357 combines functionality with style, making it an ideal choice for any professional setting.

Grade 1 Storeroom Lock

Grade 1 Storeroom/Closet 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