Corbin Russwin CL3851 Grade 2 Entrance or Office Cylindrical Lock

The Corbin Russwin CL3851 is a Grade 2 cylindrical lever lockset built for entrance and office doors in commercial buildings. It's the F109 function, which means the outside lever locks via push-button turn while the inside lever stays free for egress at all times. Part of the Corbin Russwin CL3800 Series, this is the lever lockset that gets specified into office suites, admin rooms, private offices, classroom support spaces, and general-purpose interior doors across schools, hospitals, and commercial buildings. ANSI/BHMA A156.2 Grade 2 certified, 7-year limited warranty.

What Is the Corbin Russwin CL3851

The CL3851 is the entrance/office function in Corbin Russwin's CL3800 Grade 2 cylindrical lever lock series. "CL" stands for cylindrical lever, "3800" is the series, and "51" codes the entrance/office function per ANSI F109. Buyers also search this lock as "CL3851 entrance lock" or "Corbin 3851 office lockset." The mechanism works like this: push the inside turn button and the outside lever locks, requiring a key to unlock from the outside. Turn the inside lever and the outside lever unlocks immediately, so you always have free egress. The outside lever free-wheels when locked, which prevents forcing the mechanism through lever pressure.

CL3851 Specifications and ANSI F109 Function

• Function: ANSI F109 Entrance / Office

• Grade: ANSI/BHMA A156.2 Grade 2

• Handing: non-handed

• Chassis: steel, zinc dichromated for corrosion resistance

• Door thickness: 1-3/8" to 1-3/4" (factory set for 1-3/4")

• Backset: 2-3/4" standard (2-3/8", 3-3/4", and 5" optional)

• Latchbolt: 1/2" throw with universal floating front (fits flat and beveled doors)

• Latch face: 2-1/4" x 1-1/8" square corner, standard

• Auxiliary latchbolt: deadlocking anti-manipulation latch

• Strike: 4-7/8" ANSI curved lip strike standard, 2-3/4" T-strike also available

• Cylinder: brass, 6-pin, L4 keyway standard

• Keys: 2 nickel silver keys included

• Warranty: 7-year limited

Corbin CL3851 Lever Styles and Finishes

Three lever designs ship on the CL3851: Armstrong (AZD), Newport (NZD), and Princeton (PZD). The Armstrong is a traditional straight lever with a curved return, the Newport has a softer rounded profile, and the Princeton is the heavier contemporary design. All three meet ADA operating force requirements. Available finishes include 626 Satin Chrome (most specified), 612 Satin Bronze, 613 Oil Rubbed Bronze, BSP Matte Black, plus the full Corbin finish line including 605 Bright Brass, 606 Satin Brass, and 625 Bright Chrome. Match the finish to the rest of your door hardware schedule for a unified architectural look across the opening.

CL3851 Keying and Cylinder Options

The standard CL3851 ships with a Corbin Russwin conventional 6-pin cylinder in the L4 keyway with two nickel silver keys. If you need to integrate with a masterkey system, choose alternate keyways: D1, 59A1, 60, or 67. Keying options at checkout include keyed different (KD, default), keyed alike , or master keyed (MK, all locks with different keys plus one master that opens all). The lock also accepts interchangeable cores: M08 for small format Best SFIC (less core), CL6 or CL7 for Corbin Russwin large format IC (less core), or LC for fewer cylinders if you're supplying your own. Construction master keying is supported for jobsite phases.

Where to Buy the Corbin Russwin CL3851

We've stocked Corbin Russwin lever locks since 2001, and the CL3851 ships the same day from the CL3800 Grade 2 series lineup.