Corbin Russwin CL3351 Grade 1 Entrance/Office Extra Heavy-Duty Cylindrical Lever Lock

Corbin Russwin CL3351-KEYED Entrance/Office Extra Heavy-Duty Cylindrical Lever Lock with Vandal-Resistant Lever Release Design

Grade 1 Commercial Cylindrical Lockset for High-Traffic Entrance and Office Applications

The Corbin Russwin CL3351-KEYED is an extra heavy-duty, Grade 1 commercial cylindrical lever lock engineered for demanding entrance and office applications. Conforming to ANSI function F109 (Entrance/Office), this keyed cylindrical lever lock features a deadlocking latchbolt operable by lever from either side, except when the turn button locks the outside lever. Designed for door thicknesses of 1-3/4" to 2" with a 2-3/4" backset, the CL3351 is built from steel with zinc dichromate treatment for corrosion resistance and is available in all standard architectural finishes including the most common configuration of NZD Newport lever in 626 Satin Chrome finish.

Professional Features & Benefits

• Grade 1 cylindrical lockset per ANSI/BHMA A156.2 Series 4000, Grade 1
• Lever Release™ design for vandal resistance — outside lever rotates freely when locked
• EZ-Install components significantly reduce installation time
• Independent return springs prevent lever sag
• 4 solid cast lever options (Armstrong, Newport, Princeton, Frascati)
• Anti-rotational through-bolts at 6 and 12 o'clock positions
• Accommodates 6 or 7-pin conventional cylinders and all keying levels
• CL3352 Classroom Intruder function: double-cylinder lockset, always-free egress
• Available with MicroShield® antimicrobial coating (suffix option code "C")
• CL33900 electrified option: fail safe and fail secure, 12 or 24VAC/VDC
• ElectroLynx® 8-pin connector on all electrified products
• Seven-year limited warranty (two-year for electrified)

Technical Specifications

• Grade: ANSI/BHMA A156.2 Series 4000, Grade 1
• Handing: Non-handed (except FZD trim)
• Door Thickness: 1-3/4" (44mm) 2" (51mm) standard; optional over 2" 2-1/4" (57mm)
• Backset: 2-3/4" (70mm) standard; optional 3-3/4" (95mm) and 5" (127mm)
• Latchbolt: Stainless steel, 1/2" (13mm) throw; optional 3/4" (19mm) fire latch
• Auxiliary Latchbolt: Deadlocking — prevents manipulation when door is closed
• Lock Chassis: Steel, zinc dichromated for corrosion resistance
• Front: Wrought brass, bronze, or stainless steel, 2-1/4" x 1-1/8"
• Strike: Wrought brass or stainless steel ANSI curved lip, 4-7/8" x 1-1/4" x 1-1/4" lip to center
• Cylinder: Brass, 6-pin L4 keyway, 0-bitted standard
• Electrified Voltage: 12VAC/DC or 24VAC/DC (CL33900 Series)
• Electrified Current: 250mA @ 12VAC/VDC; 150mA @ 24VAC/VDC, continuous duty solenoid
• Certifications: ANSI/BHMA A156.2 Grade 1; UL-cUL listed; ANSI A117.1 Accessibility; California State Fire Marshal
• Warranty: Seven-year limited (two-year for CL33900 electrified)

Professional Applications

• Commercial Office Buildings
• Educational Facilities
• Healthcare Institutions
• Retail Establishments
• Industrial and Warehouse Facilities
• Multi-Tenant Residential Properties
• Government and Municipal Buildings

Why Choose Corbin Russwin Quality?

Corbin Russwin CL3300 Series cylindrical locksets deliver professional-grade reliability through Grade 1 extra heavy-duty construction using steel with zinc dichromated substrate for corrosion resistance, engineered to meet the demands of high-traffic commercial, industrial, and institutional environments. The Lever Release™ vandal-resistant design and Pyramid cylinder security options provide enhanced protection, while the 7 Year Limited warranty underscores the brand's commitment to long-term performance. Backed by EZ-Install components and compatibility with the CL33900 electrified access control platform, Corbin Russwin delivers a complete, dependable entrance security solution.