Corbin Russwin CL3551 Grade 2 ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$928.40
$489.27
Corbin Russwin Corbin Russwin CL3551 Entrance/Office Heavy-Duty Cylindrical Lever Lock COR-CL3551-KEYED

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

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Model: CL3551 NZD 605
$928.40
$489.27
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  • Corbin Russwin ADDER-CORBIN RUSSWIN-[KEYING]=KD - Keyed Different ADDER-CORBIN RUSSWIN-[KEYING]=KD - Keyed Different
  • Corbin Russwin ADDER-CORBIN RUSSWIN-[KEYING]=KA - Keyed Alike ADDER-CORBIN RUSSWIN-[KEYING]=KA - Keyed Alike
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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.

Manufacturer Resources

Corbin Russwin Condensed Catalog

Product Specs

Subcategory:
Cylindrical Locks
Product Group:
Mechanical Locks
Series:
CL3500 Series
Grade:
Grade 1
Duty Level:
Heavy Duty
Keyed Function:
Single Cylinder
Standard Cylinder:
Conventional 6-pin Cylinder, L4 Keyway
Standard Latch:
Deadlatch - Square corner front, 2-1/4" x 1-1/8", 2-3/4" backset
Standard Strike:
ANSI Curved Lip 1-1/4" Lip Length
Warranty:
7 Year Limited
ANSI/BHMA:
F109
Product Subgroup:
Bored Locksets
Product Type:
Leversets
Keyed:
Yes
Commercial/Residential:
Commercial
Function Description:
Deadlocking latchbolt (either side). Freewheeling lever action determined by push turn button (engaged vs engaged + turned vs disengaged). Use of outside key required in engaged + turned. Inside lever always free.
Lock Type:
Cylindrical
Handle Type:
Lever
Lock Function:
Entrance/Office
Product Attribute:
Cylindrical Locks
Product Model:
CL3551
Product Function:
Entrance/Office
Door Hand Direction:
Non-Handed
Door Thickness Range:
1-3/8" to 1-3/4"
Fire Rating:
Yes
Product Category:
Mechanical Locks
Product Substrate:
Steel, Zinc dichromated for corrosion resistance
Backset (Distance):
2-3/4"
Department:
Door Hardware

Corbin Russwin CL3551 NZD 605 – Frequently Asked Questions

1) Will the Corbin Russwin CL3551 fit a 1-3/8 inch door, or does it need a 1-3/4 inch door?
Both work. The CL3551 cylindrical lever lock covers a door thickness range of 1-3/8 inches to 1-3/4 inches, so it drops onto older 1-3/8 inch interior doors as well as standard 1-3/4 inch commercial doors. Bore it for a 2-3/4 inch backset, which is the standard latch supplied.
2) How does the Entrance/Office function on the Corbin Russwin CL3551 actually work day to day?
It is ANSI F109 Entrance/Office. The inside lever is always free for egress. The outside lever is controlled by a push turn button in the inside lever: push it and the outside lever locks, push and turn it and the outside stays locked until the key is used from outside. The latchbolt is deadlocking from either side. That is the setup a property manager wants on an office or apartment interior door where staff lock up by hand rather than by key.
3) Do I have to order the CL3551 lever lock handed for a left or right hand door?
No handing to specify. The CL3551 is non-handed, so one part number covers left and right hand doors in either swing. For a property manager stocking spares across a building, that means a single shelf item instead of two.
4) Can this Corbin Russwin lever lock go on a narrow aluminum stile door?
Only if the stile is at least 4-1/2 inches. The CL3551 chassis needs a 4-1/2 inch minimum stile, which rules out most narrow stile aluminum storefront doors. On a glass front opening with a narrow stile you want a mortise narrow stile lock or a rim device with lever trim instead.
5) What cylinder options are there if my building is on a Corbin Russwin small format interchangeable core system?
Four ways to order. Standard is a conventional 6-pin cylinder on the L4 keyway, 0-bitted. For large format interchangeable core you can take CL6 (less core, LFIC 6-pin) or CL7 (less core, LFIC 7-pin), both Corbin Russwin, and pin your own cores in. LC gives you the lock less the conventional cylinder if you are supplying your own. Keying is orderable keyed different or keyed alike for a group of openings.
6) What is the closest cross-brand equivalent to the Corbin Russwin CL3551 entrance/office lever lock?
The Falcon B511CP6D is the nearest match by function: it is a cylindrical lever lock with an Entrance/Office function, the same function family as the CL3551. The difference is duty class. The CL3551 is a Heavy Duty, Grade 1 cylindrical leverset, while the B511CP6D is a Medium Duty, Grade 2 lock. For an opening where the specification calls for Grade 1 heavy-duty cylindrical hardware, the CL3551 is the one that meets it; for lighter interior office traffic, the Falcon covers the same locking behavior at Grade 2.
7) The opening needs to stay locked at all times with no thumbturn. What should I use instead of the CL3551?
Use a storeroom-function lockset. The CL3551 is an Entrance/Office lock whose outside lever is controlled by a push turn button, which means an occupant can leave the door unlocked. The Cal-Royal AG05 is a Grade 2 storeroom lever lockset with a deadlocking latchbolt, and the Hager 2580 is a Grade 2 storeroom cylindrical lock with the Withnell lever covering 1-3/8 inch to 2 inch doors. Storeroom function keeps the outside lever locked continuously and requires the key on every entry.
8) What is the difference between the CL3551 and a classroom-function lever lock?
Function, not construction. The CL3551 is an Entrance/Office lock: the inside lever is always free and the outside lever is locked or unlocked by a push turn button on the inside. A classroom lock has no inside button at all and is locked and unlocked only by key from the outside, so occupants cannot alter the state. Cross-brand classroom options include the Cal-Royal AG03 classroom lever with a 2-3/4 inch backset and 6-pin Schlage C keyway, and the Dexter C1000 classroom lever, a Grade 1 clutching keyed lever for 1-3/8 inch to 1-3/4 inch doors.
9) Can the CL3551 go on a fire rated door?
Yes, the CL3551 is fire rated. Pair it with a labeled door and frame and a self closing, positive latching assembly to keep the opening compliant.
10) What lever styles and finishes does the CL3500 Series entrance lock come in, and can I match the rest of my building?
Three lever designs, Armstrong (AZD), Newport (NZD) and Princeton (PZD), across 14 finishes: 605 bright brass, 606 satin brass, 611 bright bronze, 612 satin bronze, 613 satin bronze oil-rubbed, 613E, 613L, 618 bright nickel, 619 satin nickel, 625 bright chrome, 626 satin chrome, 722 black oxidized bronze oil-rubbed, BSP black suede and WSP white suede powder coat. 626 satin chrome with the Newport lever is the common commercial pick, so matching existing Corbin Russwin openings usually comes down to confirming lever design and finish code.
11) Is there a lower-grade entrance/office lever lock that uses the same door prep as the CL3551?
The Cal-Royal AUS00 is an Entrance/Office lever lock rated Grade 3, and it covers a 1-3/8 inch to 1-3/4 inch door thickness range, the same range the CL3551 accommodates. The CL3551 is ANSI/BHMA Grade 1, Heavy Duty, with a 2-3/4 inch backset and a deadlocking latchbolt controlled by a push turn button. The AUS00 is built to a Grade 3 residential-duty level, so it suits low-traffic interior doors rather than the commercial and institutional openings the CL3551 targets.
12) I need the same lever look on a door that does not need to lock. What pairs with the CL3551?
Match the function, not the keying. The CL3551 is a keyed single-cylinder Entrance/Office lock; for closet, corridor, and hall doors on the same run, a passage lever with no cylinder is the counterpart. Grade 1 passage options include the Falcon K101, a non-handed Grade 1 passage cylindrical lock covering 1-3/8 inch to 2-1/4 inch doors with a fire rating, the Falcon T101 Grade 1 heavy-duty passage lever, and the Design Hardware X75 Grade 1 passage lever lockset for 1-3/4 inch doors. Lever styling will differ from the Corbin Russwin Armstrong, Newport, and Princeton designs.
13) Can a Kwikset or Baldwin entry lever be substituted for the CL3551 on a commercial door?
They serve different buildings. The CL3551 is a commercial-rated, Grade 1, heavy-duty cylindrical leverset built for office, multi-family, hospitality, and institutional traffic. Kwikset entry and passage levers such as the 200BRNL Breton are Grade 3 for 1-3/8 inch to 1-3/4 inch doors, and Baldwin Estate 5103 levers are offered in passage, privacy, and dummy functions on a decorative 5048 rose. Those are residential and decorative products; if the specification calls for Grade 1 commercial cylindrical hardware, they do not substitute.
14) Is a keypad lever lock a workable alternative to the keyed CL3551 for an office door?
Only if you want to drop keys entirely. The CL3551 is keyed with a conventional 6-pin L4 keyway cylinder, and it can also be ordered less core for a Corbin Russwin 6-pin or 7-pin LFIC, so it folds into an existing master key system. Keypad alternatives include the Delaney LP250 Grade 2 electronic keypad leverlock and the Lockey 2835, a mechanical pushbutton keyless lever with passage function for doors 1-3/16 inch to 2 inch thick. Those run on codes rather than keys, so they will not key into the facility's existing system.
15) What should I order instead of the CL3551 for a door thicker than 1-3/4 inch?
The CL3551 is catalogued for 1-3/8 inch to 1-3/4 inch doors. For a thicker leaf, the Falcon K101 Grade 1 passage cylindrical lock covers 1-3/8 inch to 2-1/4 inch and the Dexter C1000 asylum lock, a Grade 1 cylindrical lock in F87 function, covers 1-3/8 inch to 2 inch. Note that neither of those is an entrance/office function, so confirm the locking behavior you need before swapping.
16) Is the Arrow HK11 entrance lock the same thing as the CL3551?
They share the locking behavior but not the trim or the grade. The Arrow HK11-BB is a turn-pushbutton entrance cylindrical lock with a ball knob and a conventional cylinder, rated Grade 2 for 1-3/8 inch to 1-3/4 inch doors. The CL3551 is a Grade 1 heavy-duty lever lock over the same door thickness range with a 2-3/4 inch backset. Knob trim is not ADA-compliant operating hardware, so on an accessible route the lever version is the one to use.
17) What is a comparable entrance lever lock to the CL3551 for a mid-traffic commercial door?
The Hager 2525 is a Grade 2 commercial cylindrical entry lock with a lever handle covering 1-3/8 inch to 2 inch doors, and the Cal-Royal AG00 is an entrance lever with a 6-pin Schlage C keyway keyed different on a 2-3/8 inch backset for 1-3/8 inch to 1-3/4 inch doors. Both give you keyed lever entry at Grade 2. The CL3551 differs in being Grade 1 heavy duty with a 2-3/4 inch backset and a 6-pin L4 keyway, so check the existing bore centerline and keyway before substituting.
18) For a restroom or bedroom door in the same building, what replaces the CL3551?
Use a privacy set rather than a keyed entrance lock. The CL3551 is a single-cylinder keyed lock with a push turn button controlling the outside lever. Privacy alternatives include the Hager 2540 Grade 2 cylindrical privacy lock with the Withnell lever for 1-3/8 inch to 2 inch doors and the Arrow MK02-TA Grade 2 privacy cylindrical lock with a Tudor knob, which is fire rated. Privacy sets lock from inside with no key cylinder, so they are not for an office or entry door needing key control.
19) What is the CL3551 chassis made of, and will it hold up in a corridor that gets abused?
The chassis is steel, zinc dichromated for corrosion resistance, rated heavy duty for commercial use. The levers are solid cast with no plastic inserts, the chassis is thrubolted so it cannot rotate in the door, and the spring cassette is non-handed to stop lever sag, which is the usual failure on high traffic doors.
20) I need a matching non-functioning lever for a fixed leaf next to a CL3551 opening. What works?
A dummy trim covers that. The BEST 9K Series 1DT is a Grade 1 heavy-duty non-keyed single dummy trim cylindrical lever, the Accentra 455LN Augusta is a Grade 1 heavy-duty single dummy cylindrical lever from the 5400 Series, and the BEST 7KC single dummy trim is a Grade 2 medium-duty version. Dummy trim is surface-applied with no latch or chassis, so it will not operate the door; the CL3551 by contrast carries a deadlocking latchbolt and a keyed cylinder.
How fast can I get the Corbin Russwin CL3551 NZD 605 delivered?
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Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Corbin Russwin CL3551 NZD 605 come with a warranty?
Absolutely. The Corbin Russwin CL3551 NZD 605 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Corbin Russwin CL3551 NZD 605?
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