Corbin Russwin CL3551 Grade 2 Entrance/Office Heavy-Duty Cylindrical Lever Lock

Corbin Russwin CL3551-KEYED Heavy-Duty Grade 1 Entrance/Office Cylindrical Lever Lock, Non-Handed, 626 Satin Chrome

Commercial-Grade Cylindrical Lever Lock with Flexible Locking Control for Entrance and Office Applications

The Corbin Russwin CL3551-KEYED is a Heavy-Duty Grade 1 cylindrical lever lock engineered for demanding commercial, institutional, and multi-family environments. Designed to ANSI function F109 (Entrance/Office), this keyed cylindrical lever lock features a deadlocking latchbolt operable by lever from either side, with outside lever control managed via a push turn button. The lock accommodates door thicknesses of 1-3/8" to 1-3/4" with a 2-3/4" backset, and is supplied with a brass 6-pin cylinder on the L4 keyway, 0-bitted standard, along with two nickel silver keys. The most common configuration features the NZD Newport lever in 626 Satin Chrome finish, and the product carries ANSI/BHMA Grade 1 certification with a 7 Year Limited warranty.

Professional Features & Benefits

• Grade 2 standard-duty lever lockset per ANSI/BHMA A156.2 Series 4000, Grade 2
• Lever Release freewheeling levers for vandal resistance
• Solid cast levers with no plastic inserts
• Thrubolts prevent chassis rotation; ensure alignment, smooth operation and long life
• Non-handed spring cassette prevents lever sag
• 1/2" throw latchbolt accommodates 7/8" and 1" edge bore preps
• 2-3/8", 2-3/4", 3-3/4" and 5" backsets available
• UL/cUL listed for 3-hour fire doors up to 4' x 10'
• 14 finishes plus MicroShield® antimicrobial options
• High Security and security key systems available (Access 3®, Pyramid)
• Five-year limited warranty

Technical Specifications

• Grade: ANSI/BHMA A156.2 Series 4000, Grade 2
• Door Prep: ANSI/BHMA A156.115
• Handing: Non-handed
• Door Thickness: 1-3/8" to 1-7/8" (35–48mm) standard; optional 2" 2-1/4" (57mm)
• Backset: 2-3/4" (70mm) standard; optional 2-3/8", 3-3/4", 5"
• Latchbolt: Stainless steel, 1/2" (13mm) throw
• Front: Wrought brass, bronze, or stainless steel, 2-1/4" x 1-1/8" (standard)
• 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
• Minimum Stile: 4-1/2" (114mm)
• Certifications: ANSI/BHMA A156.2 Grade 2; UL/cUL 3-hour fire rating; ADA A117.1; NFPA 80; Windstorm/Hurricane certified
• Warranty: Five-year limited

Professional Applications

• Interior Office Environments
• Commercial Office Buildings
• Apartment and Multi-Family Residential Complexes
• Convalescent and Elderly Care Facilities
• Hotels and Hospitality Properties
• Restaurants and Retail Centers
• Educational and Institutional Facilities

Why Choose Corbin Russwin Quality?

Corbin Russwin CL3500 Series cylindrical lever locks deliver professional-grade reliability through solid cast lever construction, independent return springs, and a through-bolted chassis engineered to prevent rotation and maintain precise alignment under heavy commercial use. The CL3551-KEYED carries ANSI/BHMA Grade 1 certification and is backed by a 7 Year Limited warranty, reflecting Corbin Russwin's commitment to long-term performance. With trim and keying compatibility across the Corbin Russwin lockset family, the CL3500 Series enables facility-wide consistency without compromising functionality or durability.