Falcon X581 Heavy Duty Grade 1...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,104.00
$608.58
Falcon Falcon X581 - Storeroom Lock - Heavy Duty Single Cylinder Cylindrical Lock, Grade 1 FAL-X581

Falcon X581 Heavy Duty Grade 1 Storeroom Cylindrical Lock with Interchangeable Core

(No reviews yet) Write a Review

Model: X581LD EG 626
$1,104.00
$608.58
Selected Finish is
Selected Lever Type is
Selected Cylinder is
Selected Latch is
Selected Strike is

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

$1,104.00
$608.58
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

Falcon X581 Heavy Duty Grade 1 Storeroom Cylindrical Lock with Interchangeable Core

Professional-Grade Security for Demanding Commercial Applications

The Falcon X581 delivers heavy-duty cylindrical lock performance with Grade 1 certification for the most demanding commercial applications. This storeroom function lock accommodates door thickness from 1-3/8" to 2-1/4" and features interchangeable cores compatible with SFIC products from other manufacturers for convenient re-keying. Built with brass or cold-formed steel construction and available with optional XC stainless steel construction for marine environments, this UL listed lock provides 3-hour fire rating performance.

Professional Features & Benefits

  • Door Compatibility: Accommodates door thickness from 1-3/8" to 2-1/4" with 2-3/4" backset for versatile installation options.
  • Grade 1 Durability: ANSI/BHMA A156.2 Series 4000 Grade 1 certified for maximum durability in high-traffic commercial applications.
  • Interchangeable Core System: Quick, convenient re-keying with cores compatible with SFIC products from other manufacturers for flexible key management.
  • Heavy-Duty Construction: Brass or cold-formed steel construction with zinc dichromate coating provides exceptional rust resistance and longevity.
  • Marine Environment Option: Optional XC construction combines stainless steel and nonferrous chassis with stainless steel trim for superior corrosion resistance in moisture and salt exposure.
  • Fire Safety Compliance: UL listed with 3-hour A label fire rating for code compliance in fire-rated door applications.
  • Reinforced Rose Design: Heavy-wrought brass, bronze or stainless steel roses over steel through-bolted rose inserts provide added strength and security.
  • Manufacturer Warranty: 10-year limited warranty for added confidence and protection in commercial installations.

Technical Specifications

  • ANSI/BHMA: F86
  • Backset (Distance): 2-3/4",Strike,5185 - Square Corner
  • Commercial/Residential: Commercial
  • Department: Door Hardware
  • Door Hand Direction: Non-Handed
  • Door Thickness Range: 1-3/8" to 2-1/4"
  • Duty Level: Heavy Duty
  • Fire Rating: Yes
  • Grade: Grade 1
  • Keyed: Yes
  • Keyed Function: Single Cylinder
  • Lock Function: Storeroom
  • Lock Type: Cylindrical
  • Product Attribute: Cylindrical Locks
  • Product Category: Mechanical Locks
  • Product Function: Storeroom
  • Product Group: Mechanical Locks
  • Product Subgroup: Bored Locksets
  • Product Type: Knobsets
  • Series: X Series
  • Standard Strike: 1-1/4" x 4-7/8", ANSI, Square curved lip corner, no box
  • Subcategory: Cylindrical Locks
  • UL Listing Type: UL Listed (3 Hour A Label)

Installation & Operation

  1. Review manufacturer specifications and verify door preparation requirements including door thickness range of 1-3/8" to 2-1/4" and 2-3/4" backset requirements.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces for cylindrical lock installation.
  3. Prepare door and frame by drilling required holes and routing as specified in manufacturer instructions for proper lock body and strike installation.
  4. Install all mounting hardware and secure the device to door and frame per manufacturer torque specifications, ensuring proper alignment of through-bolted rose inserts.
  5. Adjust operational components for proper alignment, latching, and smooth operation throughout the full range of motion, verifying storeroom function operation.
  6. Test device operation to verify proper function and make final adjustments as needed. Refer to manufacturer documentation for complete installation details and troubleshooting.

Professional Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Government and Military Facilities
  • Marine Environment Applications
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties

Design Options & Finishes

The X581 offers multiple knob designs including Hana-Gala, Troy-Gala, Troy-York, Hana-York, Elite-Gala, and Elite-York styles. Available finishes include bright brass (605), satin brass (606), satin bronze (612), oil-rubbed bronze (613), bright chrome (625), satin chrome (626), and satin stainless steel. Abrasive-coated and knurled knobs are available for hazardous area identification to assist handicapped individuals.

Why Choose Falcon Quality?

Falcon X Series cylindrical locks deliver professional-grade reliability with heavy-duty brass or cold-formed steel construction certified to ANSI/BHMA Grade 1 standards. The 10-year limited warranty and UL 3-hour fire rating provide added confidence for demanding commercial applications. Engineered for those unique applications requiring knob operation with added strength for security, the X581 combines durability with convenient interchangeable core re-keying capability.

Manufacturer Resources

Falcon Locks Catalog

Product Specs

Product Group:
Mechanical Locks
Series:
X Series
Grade:
Grade 1
Duty Level:
Heavy Duty
Standard Strike:
1-1/4" x 4-7/8", ANSI, Square curved lip corner, no box
Subcategory:
Cylindrical Locks
ANSI/BHMA:
F86
Product Subgroup:
Bored Locksets
Keyed Function:
Single Cylinder
Commercial/Residential:
Commercial
Keyed:
Yes
Product Type:
Knobsets
Lock Type:
Cylindrical
UL Listing Type:
UL Listed (3 Hour A Label)
Lock Function:
Storeroom
Product Attribute:
Cylindrical Locks
Backset (Distance):
2-3/4",Strike,5185 - Square Corner
Product Function:
Storeroom
Door Hand Direction:
Non-Handed
Door Thickness Range:
1-3/8" to 2-1/4"
Fire Rating:
Yes
Product Category:
Mechanical Locks
Department:
Door Hardware

Falcon X581LD EG 626 – Frequently Asked Questions

1) What does storeroom function mean on the Falcon X581, and is it right for a mechanical room?
Storeroom function (ANSI/BHMA F86) means the outside knob is always locked and only the key retracts the latch; the inside knob always turns free for egress, and there is no button or way to leave the outside unlocked. That is exactly what you want on a mechanical room, electrical closet, janitor closet, or supply room where the door must never be left open by accident. If you need staff to be able to unlock the outside knob and leave it unlocked during the day, storeroom is the wrong function.
2) Can I put my building's existing small format interchangeable cores in the Falcon X581?
Yes, if you order the Less SFIC cylinder option. The X581 takes small format interchangeable cores and the description states its cores are compatible with SFIC products from other manufacturers, so a facility already standardized on SFIC can drop its own cores in and keep one key system. There are three cylinder choices when ordering: conventional 6-pin, less cylinder, and less SFIC. Order less SFIC if you are supplying your own cores, conventional 6-pin if you want Falcon to supply a standard cylinder.
3) Is the Falcon X581 knob lock approved for a fire rated door?
It is UL Listed with a 3 hour A label fire rating, so it can go on fire rated openings up to that rating. Pair it with the correct fire rated frame and strike prep. Note the lock is non-handed, so one part number works on a left or right hand door without ordering handing.
4) What keyways can I get on the Falcon X581 storeroom lock?
Nine keyway choices when ordering: G (Falcon standard), Schlage C, E, H, K, L, N, P, or None if you are ordering less cylinder and supplying your own core. Schlage C matters most for retrofits, since it lets the X581 join an existing Schlage C keyed system on a campus without rekeying everything else. Keying (keyed alike, keyed different, master keyed) is specified separately at order.
5) What is the closest Grade 1 heavy duty storeroom knob lock to the Falcon X581?
The Sargent 8XG04 is the nearest equivalent. It is a Grade 1 heavy duty storeroom/closet single cylinder knob lock on a 2-3/4 inch backset, matching the X581's Grade 1 heavy duty storeroom function, single cylinder keying, and 2-3/4 inch backset. Both are cylindrical knobsets for keyed commercial openings where the outside knob stays locked and the key retracts the latch.
6) We need a keyed knob lock on a thick door - which options cover door thicknesses over 2 inches?
The Falcon X581 accepts doors from 1-3/8 inch to 2-1/4 inch. Among keyed cylindrical knob peers, the Corbin Russwin CK4851 Grade 1 entrance/office lock covers 1-3/8 inch to 2 inch, and the Dexter C2000 entry/office knob covers 1-3/8 inch to 1-3/4 inch. If the door measures between 2 inch and 2-1/4 inch, the X581 is the one of those three that reaches it.
7) What should I use instead of the X581 if the door needs to stay unlocked for free passage?
Storeroom function on the Falcon X581 keeps the outside knob locked at all times. For a door that must swing freely from both sides, the Schlage D10S is a Grade 1 heavy duty passage latch with an Orbit knob, and the Corbin Russwin CK4310 is a Grade 1 passage/closet cylindrical lock with a Global knob covering 1-3/8 inch to 2 inch doors. Both are non-keyed.
8) The X581 is fire rated - are the residential-grade knob locks an acceptable substitute on a fire door?
No. The Falcon X581 is UL listed with a 3 hour A label fire rating and ANSI/BHMA Grade 1 certification. Knob locks such as the Kwikset 400P-CP and the Master Lock BC series keyed entry knob are Grade 3, and the Pamex FTF Baron entrance/office knob is Grade 3 for 1-3/8 inch to 1-3/4 inch doors. For a labeled fire door opening, stay with the fire rated Grade 1 lock.
9) Is the Falcon X581 tough enough for a high traffic school or hospital door?
It is certified to ANSI/BHMA A156.2 Series 4000 Grade 1, the top commercial durability grade, and rated heavy duty. Construction is brass or cold-formed steel with zinc dichromate coating, and the heavy wrought brass, bronze or stainless roses sit over steel through-bolted rose inserts, which is what keeps knobs from working loose on doors that see constant use. Grade 1 is what most school, healthcare, and government specs call for on corridor and storeroom openings.
10) Is there a Falcon X581 version that will hold up near salt water?
Yes, the XC construction option. It combines a stainless steel and nonferrous chassis with stainless steel trim for corrosion resistance in moisture and salt exposure, which is what you want on a coastal building, pool room, or marine facility. Standard construction is brass or cold-formed steel with zinc dichromate coating, fine indoors but not the choice for salt air. Pair XC with the 630 satin stainless finish for a consistent look.
11) What knob styles and finishes does the Falcon X581 come in for matching other doors in a building?
Six knob designs: Elite-Gala (EG), Elite-York (EY), Hana-Gala (HG), Hana-York (HY), Troy-Gala (TG), and Troy-York (TY). Finishes are 605 bright brass, 606 satin brass, 613 oil-rubbed satin bronze, 625 bright chrome, 626 satin chrome, and 630 satin stainless steel. For a property manager standardizing a building, 626 satin chrome and 630 satin stainless are the usual commercial matches. Knurled and abrasive-coated knobs are also offered for hazardous area identification by touch.
12) How does the Falcon X581 compare to the Sargent 8XG04 storeroom knob lock?
They sit in the same class. The Sargent 8XG04 is a Grade 1 heavy duty storeroom/closet single cylinder knob lock from the 8X Line with a 2-3/4 inch backset, matching the X581 on grade, duty, function, and backset. The practical difference is the key system and trim family you are standardizing on. If you need a cheaper storeroom knob and the opening is lower traffic, the Sargent 6G04 is the Grade 2 standard duty storeroom version instead.
13) I need a Grade 1 knob lock but not storeroom function. What else is there?
The X581 is storeroom only, outside knob permanently locked. For an entrance function where the outside can be unlocked, the BEST 8K Series entrance single cylinder knob lock is Grade 1 heavy duty. For a non-keyed passage on a Grade 1 opening, the Schlage D10S passage latch with Orbit knob is Grade 1 heavy duty. If the door needs classroom function on a lighter opening, the Dexter C2000 Series classroom ball knob is Grade 2 and fits 1-3/8 to 1-3/4 inch doors.
14) Can the Falcon X581 be ordered with no cylinder at all so our locksmith keys it?
Yes. Choose Less Cylinder and select None on the keyway, and the lock ships without a cylinder for your locksmith to fit. Less SFIC is the option if you specifically want the small format interchangeable core housing and will supply your own cores. Conventional 6-Pin is the choice when you want a standard cylinder supplied and keyed to one of the offered keyways.
15) Can I use the Imperial ED-BKL580 storeroom knob trim in place of the Falcon X581?
No. The Imperial USA ED-BKL580 is knob trim with storeroom function from the ED-500 series, meaning it mounts to an exit device rather than working as a standalone lock. The Falcon X581 is a complete cylindrical knob lock with its own chassis, latch and strike for a bored door prep. The Sargent 28C-KNOB is likewise exit device trim, not a bored lockset.
16) Is there a Grade 1 knob lock with a key that also lets the inside be locked for office use?
The Falcon X581 is storeroom function, which has no locking control at the knob - it is always secure from outside. The BEST 8K entrance function knob lock is Grade 1 heavy duty, single cylinder, and the Corbin Russwin CK4851 is a Grade 1 entrance/office cylindrical lock with a conventional cylinder fitting 1-3/8 inch to 2 inch doors. Entrance/office function is the one that allows the occupant to set the outside knob locked or unlocked.
17) Do any of the comparable knob locks take an interchangeable core like the Falcon X581?
The Falcon X581 can be ordered less small format interchangeable core so an SFIC can be dropped in, or with a conventional 6-pin cylinder. Among the Grade 1 storeroom peers, the Sargent 8XG04 is a single cylinder storeroom knob lock on the 8X line and the BEST 8K is a Grade 1 single cylinder entrance knob lock - if your facility is standardized on a small format core keying system, order the X581 less SFIC and supply your own core.
18) Is there a keyless option for a storage door instead of a keyed storeroom knob?
The Lockey 3830 is a mechanical keyless combination knob lock with an auto-locking passage function, fitting doors from 1 3/16 inch to 2 inch. It uses a pushbutton code rather than the Falcon X581's single cylinder key, so no key management or core is involved, though the X581 is the Grade 1 fire rated choice where a labeled door or ANSI Grade 1 cycle life is specified.
19) What matches the X581 knob look on a door that only needs a pull with no latch?
For a non-functioning door such as an inactive leaf or closet face, a dummy trim is used instead of the Falcon X581's keyed storeroom chassis. The BEST 6K single dummy trim is a Grade 2 medium duty non-keyed cylindrical knob, and the Schlage A170 is a Grade 2 heavy duty single dummy trim for 1-3/8 inch to 1-7/8 inch doors. Neither has a latch or a cylinder.
How fast can I get the Falcon X581LD EG 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 Falcon X581LD EG 626 come with a warranty?
Absolutely. The Falcon X581LD EG 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 Falcon X581LD EG 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 Falcon X581LD EG 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.
!