Accentra 5421LN Monroe Heavy D...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,031.75
$585.02
Yale Commercial Yale 5421LN Monroe Heavy Duty Grade 1 Communicating Cylindrical Lever Lock YAL-MO-5421LN

Accentra 5421LN Monroe Heavy Duty Grade 1 Communicating Cylindrical Lever Lock

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Model: MO-5421LN-626
From the 5400 Series Collection
Selected Finish is

In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,031.75
$585.02
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Accentra 5421LN Monroe Heavy Duty Grade 1 Communicating Cylindrical Lever Lock

Professional Grade 1 Cylindrical Lockset for Commercial Applications

The Accentra 5421LN Monroe lever lock delivers heavy-duty Grade 1 performance for demanding commercial and industrial applications. This communicating cylindrical lockset features a 2-3/4" standard backset with adjustable door thickness from 1-3/4" to 2-1/4", accommodating a wide range of door configurations. Built with heavy-gauge steel mechanism and 1/2" stainless steel latchbolt throw, this ANSI/BHMA Grade 1 certified lockset provides reliable access control with UL/cUL fire rating up to 3 hours.

Professional Features & Benefits

  • ANSI/BHMA: A156.2, Series 4000 Grade 1
  • UL/cUL: UL/cUL fire-rated up to 3 hours
  • Windstorm: Certified (refer to local codes)
  • Mechanism: Heavy-gauge steel, zinc-plated, dichromated
  • Backset: 2-3/4" standard; 3-3/4" or 5" extension link available to order
  • Latchbolt: 1/2" stainless steel throw standard; 3/4" throw available to order
  • Guardbolt: Deadlocks latchbolt when door is closed; standard on all locking functions
  • Door Thickness: Adjustable from 1-3/4" to 2-1/4"
  • Fronts: 2-1/4" x 1-1/8" beveled standard; flat fronts available to order
  • Lead Shielding: Available to order
  • Cylinders: Brass, 6-pin, keyed-random cylinder with two keys furnished standard, 7-pin available to order. For other cylinder and keying options, see page 31.
  • Reversibility: Non-handed
  • Strikes: 1-1/4" curved lip for 1-3/4" door standard; other lip lengths available to order; all reversible
  • Finishes: Available in 13 finishes, including PVD lifetime finish options for 613. PVD is standard for 605 and 606
  • Warranty: 7-year mechanical

Installation & Operation

  1. Review manufacturer specifications and verify door preparation requirements including door thickness from 1-3/4" to 2-1/4", backset requirements, and handing as applicable to this product.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces for the 2-1/4" x 1-1/8" beveled front.
  3. Prepare door and frame by drilling required holes and routing as specified in manufacturer instructions for cylindrical lockset installation.
  4. Install all mounting hardware and secure the device to door and frame per manufacturer torque specifications, ensuring proper alignment of the guardbolt mechanism.
  5. Adjust operational components for proper alignment, latching, and smooth operation throughout the full range of motion, verifying the free wheeling lever mechanism functions correctly.
  6. Test device operation to verify proper function including latchbolt throw, guardbolt engagement, and lever return spring operation. Refer to manufacturer documentation for complete installation details and troubleshooting.

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 Accentra Quality?

Accentra cylindrical lever locks deliver professional-grade reliability with heavy-gauge steel construction and Grade 1 certification for demanding commercial applications. The 7-year mechanical warranty and UL/cUL fire rating up to 3 hours demonstrate the manufacturer's commitment to quality and code compliance. Engineered for demanding commercial applications where dependable access control and long-term performance are essential.

Product Specs

Series:
5400 Series
Subcategory:
Lever Locksets
Grade:
Grade 1
Product Group:
Mechanical Locks
Product Subgroup:
Bored Locksets
Product Type:
Leversets
Commercial/Residential:
Commercial
Lock Type:
Cylindrical
Handle Type:
Lever
Lock Function:
Communicating
Product Attribute:
Cylindrical Locks
Product Model:
YAL-5421LN
Collection:
5400 Series
Product Function:
Communicating
Lever Design Name:
Monroe Lever
Product Category:
Mechanical Locks
Department:
Door Hardware

Accentra MO-5421LN-626 – Frequently Asked Questions

1) What does the communicating function on the Accentra 5421LN actually do on a door?
A communicating lock is keyed on both sides with no deadlocking from a single side, so either room can lock or unlock passage between them. That makes the 5421LN Monroe a fit for connecting doors between adjoining offices, hotel rooms, or treatment rooms. If you need a function where the outside stays locked and the inside always exits free, that is a storeroom or classroom lock, not this one.
2) Will the Accentra 5421LN fit a 2 inch thick door?
Yes. The 5421LN is adjustable from 1-3/4 inch to 2-1/4 inch door thickness, so a 2 inch door is inside the range with no extra kit. It will not go down to 1-3/8 inch, which is the common older interior thickness. If you are working 1-3/8 inch doors, the Falcon K101 covers 1-3/8 to 2-1/4 inch.
3) My doors are bored for a 2-3/8 inch backset. Does the Accentra 5421LN work?
No. The 5421LN ships with a 2-3/4 inch backset as standard, which is the usual commercial bore. Extension links are available to order for 3-3/4 inch or 5 inch backsets, but there is no 2-3/8 inch option, so a residential-prepped 2-3/8 inch door needs a different lock.
4) Will the 5421LN latch into the strikes already in my frames?
Standard throw on the 5421LN is a 1/2 inch stainless steel latchbolt with a guardbolt that deadlocks it when the door closes, and it ships with a 1-1/4 inch curved lip strike sized for a 1-3/4 inch door. If your frames have deeper strike pockets or a thicker door edge condition, a 3/4 inch throw and other lip lengths are available to order. All strikes are reversible.
5) Is the Accentra 5421LN approved for a fire-rated opening?
The 5421LN carries UL/cUL fire ratings up to 3 hours and is certified to ANSI/BHMA A156.2, Series 4000, Grade 1. It is also windstorm certified, subject to your local code. Grade 1 is the highest commercial cycle and strength tier in A156.2.
6) What cylinder and keys come with the Accentra 5421LN, and can it go on my master key system?
Standard is a brass 6-pin keyed-random cylinder with two keys. A 7-pin cylinder is available to order, which is what you would specify to bring the lock onto an existing 7-pin master key system. Keying and alternate cylinder options are called out in the 5400LN series catalog.
7) What is the closest Grade 1 cylindrical lever lock to the Accentra 5421LN Monroe if the opening only needs free passage, no keying?
The Accentra 5421LN Monroe is a Grade 1 communicating cylindrical lever lock with a keyed cylinder. If the door only needs latching without any locking, the Falcon K101 is a Grade 1 heavy duty non-keyed passage cylindrical lock that fits doors 1-3/8 inch to 2-1/4 inch, matching the 5421LN's 2-1/4 inch upper door thickness limit, and it is fire rated. Corbin Russwin CL3110 is another Grade 1 passage option, fire rated, for doors 1-3/4 inch to 2 inch. Dexter C1000 passage is Grade 1 with clutching levers for 1-3/8 inch to 1-3/4 inch doors.
8) We need a Grade 1 lever lock for a classroom instead of a communicating function - what should we order?
The Accentra 5421LN Monroe is built for communicating openings between two rooms. For a classroom door, the Dexter C1000 classroom lever is Grade 1 with clutching keyed levers for doors 1-3/8 inch to 1-3/4 inch, and the Dexter C1000 classroom security version is also Grade 1 with the same door thickness range for doors that need to be secured from inside. Cal-Royal AG03 is a classroom lever in the AG Series with a 2-3/4 inch backset, the same backset the 5421LN uses as standard.
9) Which Grade 1 lever lock should we use for a storeroom or utility door rather than the Accentra 5421LN?
The Accentra 5421LN Monroe covers communicating openings. For utility and institutional doors where both sides must stay locked and key operated, the Dexter C1000 asylum function is Grade 1 and fits doors 1-3/8 inch to 2 inch. If Grade 2 is acceptable, the Hager 2580 is a storeroom cylindrical lock with the Withnell lever for 1-3/8 inch to 2 inch doors, and the Cal-Royal AG05 is a Grade 2 storeroom lever with a deadlocking latchbolt - the 5421LN uses a guardbolt that deadlocks its latchbolt when the door closes.
10) Is a residential entry leverset an acceptable substitute for the Accentra 5421LN Monroe in a commercial building?
The Accentra 5421LN Monroe is classified for commercial use, ANSI/BHMA Grade 1 and UL/cUL fire rated up to 3 hours. Residential-grade leversets are a different class: the Kwikset 200BRNL Breton passage lever is Grade 3 for doors 1-3/8 inch to 1-3/4 inch, the Cal-Royal AUS00 entrance/office lever is Grade 3 for the same thickness range, and the Master Lock RL Series keyed entry lever is Grade 3. Those are not Grade 1 and will not satisfy a Grade 1 or fire-rated spec on a drawing.
11) Our door is thicker than 2 inches - which lever locks besides the Accentra 5421LN will fit?
The Accentra 5421LN Monroe adjusts from 1-3/4 inch to 2-1/4 inch door thickness, so it covers thick commercial doors directly. Among lever locks with comparable reach, the Falcon K101 Grade 1 passage lock also spans 1-3/8 inch to 2-1/4 inch. Most alternatives stop at 2 inches, including the Corbin Russwin CL3110 at 1-3/4 inch to 2 inch and the Hager 2525 entry lever at 1-3/8 inch to 2 inch, so verify the leaf thickness before substituting.
12) Do I need to specify handing when I order the Accentra 5421LN Monroe lever?
No handing to call out. The 5421LN is non-handed and the strike is reversible, so one part number covers left and right hand openings. That is useful when you are stocking spares for a building instead of matching each door.
13) What finishes does the Accentra 5421LN Monroe lever come in?
Nine finishes are orderable: 605 bright brass, 606 satin brass, 612 satin bronze, 613E dark oxidized satin bronze equivalent, 619 satin nickel, 625 bright chrome, 626 satin chrome, plus black suede and white suede powder coat. PVD is standard on 605 and 606, which is the one to pick when you need the brass to hold up in a high-touch or exterior-exposed corridor.
14) Do I need a lead-lined or flat-front version for an X-ray room door?
Both are order options on the 5421LN. Lead shielding is available to order for radiology and imaging openings, and flat fronts can replace the standard 2-1/4 x 1-1/8 inch beveled front where the door edge is square rather than beveled. Neither is the stock configuration, so they have to be called out on the order.
15) What is the Grade 1 alternative to the Accentra 5421LN if I need a different lock function?
Within the same Grade 1 cylindrical class, ZenSupply carries the Corbin Russwin CL3110 passage lever for 1-3/4 to 2 inch doors, the Dexter C1000 classroom and asylum functions, and the Falcon K101 Grade 1 passage lever rated for 1-3/8 to 2-1/4 inch doors. Communicating function is the distinguishing feature of the 5421LN, so those peers are function substitutes, not drop-in equivalents.
16) Is the Accentra 5421LN heavy enough for a school or hospital corridor?
It is built for that traffic. The mechanism is heavy-gauge steel, zinc-plated and dichromated, and the lock is certified Grade 1 under A156.2 Series 4000, the commercial heavy-duty tier. Grade 2 and Grade 3 leversets like the Hager 2525 or Cal-Royal AUS00 are lighter-duty and better suited to low-traffic or light commercial openings.
17) Is there a lighter duty lever lock we can use instead of the Accentra 5421LN on low traffic interior doors?
The Accentra 5421LN Monroe is ANSI/BHMA A156.2 Series 4000 Grade 1 with a heavy gauge steel mechanism, built for high traffic commercial openings. For lighter interior traffic, Grade 2 cylindrical levers include the Falcon B101 passage lever, rated medium duty and non-handed like the 5421LN, and the Hager 2510 passage lever with the Withnell design for doors 1-3/8 inch to 2 inch. Design Hardware J75 is a Grade 2 passage lever for 1-3/4 inch doors.
18) Will a lever trim for an exit device work on a door prepped for the Accentra 5421LN Monroe?
No. The Accentra 5421LN Monroe is a complete cylindrical lockset with its own latchbolt, guardbolt and strike, prepped on a 2-3/4 inch backset. The Corbin Russwin 585F715 is a Grade 1 lock lever made as trim for the ED8000 pushpad exit device and the CL3300 cylindrical series for doors 1-3/4 inch to 2 inch, and the Imperial USA ED-EL500HD is heavy duty escutcheon lever trim in the ED-500 Series. Both are trim components that mount to a separate device, not standalone bored locksets.
19) Can I use a keypad lever set instead of the keyed Accentra 5421LN Monroe?
The Accentra 5421LN Monroe is keyed, furnished standard with a brass 6-pin keyed-random cylinder and two keys, so it fits a facility on a key system. Keyless alternatives include the Lockey 1150 heavy duty mechanical keypad lever set for doors 1-1/8 inch to 2 inch, the Lockey 2835 mechanical pushbutton keyless lever for doors 1 3/16 inch to 2 inch, and the Delaney LP250 electronic keypad leverlock, which is Grade 2. Those use codes rather than a cylinder, so they will not key alike with the rest of an Accentra keyed system.
20) If the door is a privacy application such as a restroom, what do we order instead of the Accentra 5421LN?
The Accentra 5421LN Monroe is a communicating function, keyed on both sides, which is not a privacy arrangement. For restroom and bedroom doors, the Hager 2540 is a Grade 2 cylindrical privacy lock with the Withnell lever for doors 1-3/8 inch to 2 inch, and the Baldwin Estate 5103 privacy lever with the 5048 rose is a privacy function option. The Arrow MK02-TA is a privacy cylindrical lock with a Tudor knob rather than a lever, and it is fire rated.
21) We need a Schlage C keyway lever lock - does the Accentra 5421LN come that way, and what else is an option?
The Accentra 5421LN Monroe is furnished standard with a brass 6-pin keyed-random cylinder and two keys, with 7-pin available to order and further cylinder and keying options in the 5400LN catalog. If the facility is standardized on the Schlage C keyway, the Cal-Royal AG00 entrance lever is a Grade 2 lever with a 6-pin Schlage C keyway keyed different and a 2-3/8 inch backset, and the Cal-Royal AG03 classroom lever uses the same 6-pin Schlage C keyway with a 2-3/4 inch backset, matching the 5421LN standard backset.
22) What Grade 1 lever alternative has clutching or pressure release levers if abuse is a concern on the opening?
The Accentra 5421LN Monroe uses a free wheeling lever mechanism with a Monroe lever design and heavy gauge steel construction. Other Grade 1 heavy duty options built around the same idea are the Falcon T101 passage lever with Pressure Release Technology and the Dexter C1000 passage lever with clutching levers for doors 1-3/8 inch to 1-3/4 inch. The Corbin Russwin CL3110 is a Grade 1 vandal resistant passage lever for 1-3/4 inch to 2 inch doors.
How fast can I get the Accentra MO-5421LN-626 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
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 Accentra MO-5421LN-626 come with a warranty?
Absolutely. The Accentra MO-5421LN-626 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 Accentra MO-5421LN-626?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Accentra MO-5421LN-626 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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