Corbin Russwin CL3581 Grade 2 Lever & Blank Plate Heavy-Duty Cylindrical Lever Lock

Corbin Russwin CL3581-KEYED Heavy-Duty Grade 1 Cylindrical Lever Lock with Keyed Lever and Blank Plate

ANSI F113 Entrance/Office Keyed Cylindrical Lockset for Commercial and Institutional Applications

The Corbin Russwin CL3581-KEYED is a heavy-duty Grade 1 cylindrical lever lock engineered for demanding commercial, institutional, and multi-family environments. Designed to ANSI function F113, this keyed cylindrical lever lock features a deadlocking latchbolt operated by lever, except when the lever is locked by key, with a lever on one side and a blank plate on the other. Compatible with doors ranging from 1-3/8" to 1-3/4" in thickness and a standard 2-3/4" backset, the CL3581 is part of the CL3500 Series—a heavy-duty Grade 1 lockset family that complements both the CL3300 Series Extra Heavy-Duty Grade 1 and CL3800 Series Standard-Duty Grade 2 Locksets. The most common configuration features the NZD Newport lever in a 626 Satin Chrome finish.

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
• Apartment and Multi-Family Residential Complexes
• Convalescent and Elderly Care Facilities
• Hotels and Hospitality Properties
• Restaurants and Food Service Establishments
• Retail Centers and Commercial Storefronts
• Educational and Institutional Facilities

Why Choose Corbin Russwin Quality?

Corbin Russwin CL3500 Series cylindrical locksets deliver professional-grade reliability through solid cast lever construction, independent return springs, and a through-bolted chassis engineered to prevent rotation and ensure lasting alignment in high-traffic commercial applications. The CL3581-KEYED meets ANSI/BHMA Grade 1 certification standards and is backed by a 7 Year Limited warranty, providing facility managers and security professionals with the confidence of a proven, heavy-duty solution. With trim and keying compatibility across the Corbin Russwin cylindrical lockset family, the CL3500 Series supports cost-effective, cohesive hardware programs without compromising functionality or durability.