Falcon X501 Heavy Duty Grade 1...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,104.00
$608.58
Falcon Falcon X501 - Entry Lock - Heavy Duty Single Cylinder Cylindrical Lock, Grade 1 FAL-X501

Falcon X501 Heavy Duty Grade 1 Single Cylinder Entry Lock with Interchangeable Core

(No reviews yet) Write a Review

Model: X501LD 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 X501 Heavy Duty Grade 1 Single Cylinder Entry Lock with Interchangeable Core

Professional-Grade Cylindrical Lock for High-Security Applications

The Falcon X501 delivers Grade 1 heavy-duty performance with interchangeable core technology for demanding commercial applications. This single cylinder entry lock accommodates door thickness from 1-3/8" to 2-1/4" with a standard 2-3/4" backset. ANSI/BHMA A156.2 Series 4000 Grade 1 certified and UL listed with 3-hour fire rating, the X501 features optional XC construction combining stainless steel and nonferrous chassis with stainless steel trim for superior corrosion resistance in marine environments.

Professional Features & Benefits

  • Door Compatibility: Fits door thickness range of 1-3/8" to 2-1/4" with standard 2-3/4" backset for versatile installation options.
  • Grade 1 Durability: ANSI/BHMA A156.2 Series 4000 Grade 1 certification ensures maximum durability for high-traffic commercial applications.
  • Interchangeable Core System: Quick and 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.
  • Reinforced Rose Design: Heavy-wrought brass, bronze or stainless steel roses over steel through-bolted rose inserts deliver added strength and security.
  • Fire Rating Compliance: UL listed with 3-hour A label fire rating for code-compliant installations in fire-rated openings.
  • Corrosion-Resistant XC Option: Optional XC construction with stainless steel and nonferrous chassis ideal for government and military marine environment applications.
  • Manufacturer Warranty: 10-year limited warranty provides long-term protection and confidence in product reliability.

Technical Specifications

  • ANSI/BHMA: F82
  • 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: Entrance
  • Lock Type: Cylindrical
  • Product Attribute: Cylindrical Locks
  • Product Category: Mechanical Locks
  • Product Function: Entrance
  • 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 between 1-3/8" and 2-1/4", standard 2-3/4" backset, and handing as applicable to this product.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces.
  3. Prepare door and frame by drilling required holes and routing as specified in manufacturer instructions.
  4. Install all mounting hardware and secure the device to door and frame per manufacturer torque specifications.
  5. Adjust operational components for proper alignment, latching, and smooth operation throughout the full range of motion.
  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
  • High-Security Commercial Properties
  • Industrial and Warehouse Facilities

Why Choose Falcon Quality?

Falcon X501 cylindrical locks deliver professional-grade reliability with heavy-duty brass or cold-formed steel construction and Grade 1 certification for demanding commercial applications. The 10-year limited warranty and UL 3-hour fire rating provide added confidence for critical security installations. Engineered with interchangeable core technology and optional corrosion-resistant XC construction, the X501 meets the most stringent requirements for government, military, and marine environment applications.

Product Specs

Subcategory:
Cylindrical Locks
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
ANSI/BHMA:
F82
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:
Entrance
Product Attribute:
Cylindrical Locks
Backset (Distance):
2-3/4",Strike,5185 - Square Corner
Product Function:
Entrance
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 X501LD EG 626 – Frequently Asked Questions

1) Can I use the Falcon X501 on a 3 hour fire rated door?
Yes. The X501 is UL Listed with a 3 hour A label fire rating, which covers the A label openings you find in stairwells and rated corridors. It is also certified to ANSI/BHMA A156.2 Series 4000 Grade 1, function F82. If a facility spec calls for a Grade 1 keyed entrance knob lock on a rated opening, the X501 answers it on paper.
2) Can I order the Falcon X501 less cylinder so I can put my own SFIC core in it?
Yes. Three cylinder choices are offered: a conventional 6-pin cylinder, less cylinder, and less small format interchangeable core (less SFIC). The less SFIC option ships prepped for a small format core you supply, and Falcon's interchangeable cores accept SFIC products from other manufacturers, so a facility already standardized on an SFIC system can key the X501 into the existing system. If you take a keyed cylinder instead, the keyway choices are G standard, Schlage C, E, H, K, L, N, and P.
3) What is an entrance function lock and is it the right function for an office door?
Entrance function means the outside knob is locked or unlocked by key, and there is a button or turn inside so staff can secure the door from within. It's the normal choice for an office or tenant entry where someone inside controls the lock. It's not what you want on a storeroom door that must stay locked at all times regardless of what anyone does from inside. For that, a storeroom function is the right pick, such as the Sargent 8XG04, a Grade 1 heavy duty single cylinder storeroom knob lock on the same 2-3/4 inch backset. The X501 is keyed, single cylinder, entrance function.
4) I need a Grade 1 knob lock that stays locked from the outside at all times instead of an entrance function - what should I order?
Use the Sargent 8XG04, a Grade 1 heavy duty storeroom/closet single cylinder knob lock with a 2-3/4 inch backset. Storeroom function keeps the outside knob fixed so the door is always locked from outside and entry requires the key, where the Falcon X501 is an entrance function with a single cylinder. Both take the same 2-3/4 inch backset preparation, so the door prep does not change between them.
5) Is the Corbin Russwin CK4851 an acceptable substitute for a Falcon X501 entrance knob lock?
The Corbin Russwin CK4851 is a Grade 1 entrance/office cylindrical knob lock with a conventional cylinder, which makes it a functional peer of the Falcon X501 entrance cylindrical lock. The difference to confirm before ordering is the door: the CK4851 lists a door thickness range of 1-3/8 inch to 2 inch, while the X501 covers 1-3/8 inch to 2-1/4 inch. On a thick door above 2 inches the X501 is the one that fits.
6) Which knob locks look like a Falcon X501 substitute but will not work on a fire-rated opening requiring a keyed entrance lock?
Dummy trim and passage sets are the common mistake. The Schlage A170 is single dummy trim, the BEST 6K Series single dummy trim is non-keyed, and the Schlage D10S is a Grade 1 passage latch, non-keyed. None of them accept a key or secure the opening. The Falcon X501 is keyed with a single cylinder and UL listed with a 3 hour A label fire rating, so on a keyed fire-rated opening a dummy or passage set is not an exchange for it.
7) Can I use a Cal-Royal BER00 or Kwikset 400P-CP instead of a Falcon X501 on a commercial entry door?
Both are keyed entrance knob locks, but they sit well below the Falcon X501 in rating. The Cal-Royal BER00 is a Grade 3 entrance/office knob lock with a Kwikset keyway and a 1-3/8 inch to 1-3/4 inch door range; the Kwikset 400P-CP is a Grade 3 keyed entry knob for the same thickness range. The X501 is ANSI/BHMA Grade 1, heavy duty, designated for commercial use, and UL listed with a 3 hour A label fire rating. Where a specification calls for Grade 1 or a fire-rated opening, the Grade 3 sets do not satisfy it.
8) Which knob lock matches a Falcon X501 on a door thicker than 2 inches?
Among the comparable commercial knob locks, the door ranges top out lower: the Corbin Russwin CK4851 lists 1-3/8 inch to 2 inch, the Schlage A170 dummy trim 1-3/8 inch to 1-7/8 inch, and the Arrow MK01 1-3/8 inch to 1-3/4 inch. The Falcon X501 covers 1-3/8 inch to 2-1/4 inch, so for a thick commercial door it is the set to order, non-handed and with a 2-3/4 inch backset.
9) Do I need to order the Falcon X501 handed for a left hand door?
No handing to specify. The X501 is non-handed, so one part number works on left hand, right hand, and reverse bevel openings. Property managers stocking spares only need one lock on the shelf for the whole building.
10) What do I have to specify when ordering a Falcon X501 so the order is complete?
Five things get picked on an X501 order: cylinder (conventional 6-pin, less cylinder, or less SFIC), keyway, latch (98535 square corner 1-1/8 x 2-1/4 or 92331 round corner 1 x 2-1/4), strike, and keying, with a key code field if your system needs one. Finish and knob design are chosen too. Skipping the latch corner or the strike lip length is the usual cause of a lock that will not close into the frame it was ordered for.
11) Is there a version of the Falcon X501 that will hold up in a coastal or marine environment?
Yes, the optional XC construction. It pairs a stainless steel and nonferrous chassis with stainless steel trim for corrosion resistance, and Falcon aims it at government and military marine applications. On the standard build, the chassis is brass or cold-formed steel with a zinc dichromate coating, and the roses are heavy wrought brass, bronze, or stainless over steel through-bolted rose inserts.
12) What is a comparable Grade 1 heavy duty entrance knob lock to the Falcon X501 from another brand?
The closest equivalent ZenSupply carries is the BEST 8K Series entrance function single cylinder knob lock, also Grade 1 heavy duty entrance function. The Falcon X501 is the one to pick if you want interchangeable core keying with a stated 1-3/8 to 2-1/4 inch door range and a 3 hour A label UL listing. Both are keyed entrance knobs in the same duty class, so the decision usually comes down to which keying system the facility already runs.
13) I need matching non-keyed knobs for the closet and hall doors next to a Falcon X501 entry. What should I order?
The X501 is keyed entrance only, so a passage or privacy opening needs a different lock. In the same Grade 1 heavy duty class, the Schlage D10S passage latch with the Orbit knob and the Corbin Russwin CK4310 passage/closet knob (Grade 1, 1-3/8 to 2 inch doors) are the non-keyed counterparts. For a bathroom or bedroom you want a privacy function instead, like the Dexter C2000 privacy knob, Grade 2, 1-3/8 to 1-3/4 inch doors.
14) Why choose a cylindrical knob lock like the Falcon X501 instead of a mortise lock?
A cylindrical lock like the X501 goes into a standard bored door prep, which is the prep already in most existing commercial doors, so it's a straight retrofit with no routing of the door edge. A mortise lock needs a deep pocket cut into the door edge and is a bigger job on an existing opening. The X501 gets you Grade 1 heavy duty performance and a 3 hour A label UL listing while still dropping into bored prep, which is the reason it shows up on stairwell and corridor doors in schools and hospitals.
15) What is a lighter duty storeroom knob lock alternative to a Grade 1 Falcon X501?
The Sargent 6G04 is a Grade 2 standard duty storeroom/closet knob lock with a single cylinder. It shares the single cylinder keyed arrangement with the Falcon X501 but sits at Grade 2 and standard duty rather than the X501's Grade 1 heavy duty rating, and it is a storeroom function rather than entrance. For a low-traffic interior storage door where Grade 1 is not being specified, the 6G04 covers the keyed storeroom requirement.
16) What is the difference between the Falcon X501 and the Dexter C2000 entry knob lock?
The Dexter C2000 Series entry/office knob lock is Grade 2, keyed, with a non-clutching ball knob and a door thickness range of 1-3/8 inch to 1-3/4 inch. The Falcon X501 is Grade 1 heavy duty with a 1-3/8 inch to 2-1/4 inch thickness range and interchangeable core cylinders compatible with small format interchangeable core products from other manufacturers. On a facility standardizing keying across an interchangeable core system, or on doors thicker than 1-3/4 inch, the X501 is the one that carries it.
17) For a bed or bath door in a building using Falcon X501 entry locks, what knob lock should I use?
Privacy function is the right call there, and the Dexter C2000 Series privacy knob lock is a Grade 2 non-keyed privacy set for doors 1-3/8 inch to 1-3/4 inch thick. The Falcon X501 is an entrance function keyed with a single cylinder, which is not a privacy arrangement. The Pamex FTF is another privacy option, a Grade 3 Baron knob lockset for the same 1-3/8 inch to 1-3/4 inch door range.
18) Does a Lockey 3830 keyless knob lock replace a Falcon X501?
No - the Lockey 3830 is a mechanical keyless combination knob lock with an auto-locking passage function for doors 1 3/16 inch to 2 inch thick. It is a code-entry device, not a keyed cylindrical lockset. The Falcon X501 is keyed with a single cylinder and takes interchangeable cores, so where a building is keyed into a master key system the 3830 does not tie into it.
19) What keyed Grade 1 knob lock should I specify for a classroom door rather than a Falcon X501?
Classroom function differs from entrance function in how the outside knob is controlled, and the Sargent 28C-KNOB is an exit device trim with knob and rose in a classroom function for 1-3/4 inch doors. The Dexter C2000 Series classroom knob lock is a keyed Grade 2 classroom cylindrical ball knob for doors 1-3/8 inch to 1-3/4 inch. The Falcon X501 is an entrance function, so on a door where a classroom function is specified it is the wrong function code even though both are keyed cylindrical knob trim.
20) How do residential entry knobsets like the Delaney Belton or Callan Canova compare with a Falcon X501 for a multi-family turn?
The Delaney Belton and the Callan Canova are both Grade 3 entrance knobsets, and the Callan Edgewood is a Grade 2 entrance knobset. They share the keyed entry function with the Falcon X501 but not its rating: the X501 is ANSI/BHMA Grade 1, heavy duty, designated commercial, with interchangeable core re-keying. On unit entry doors under heavy tenant traffic, or where a property is standardizing on one interchangeable core keyway across a portfolio, the X501 carries the duty level and the key system that the Grade 3 sets do not.
21) Does the Falcon X501 come in a finish that will match satin chrome hardware already in the building?
Satin chrome (626) is one of six finishes on the X501, alongside 605 bright brass, 606 satin brass, 613 satin bronze oil-rubbed, 625 bright chrome, and 630 satin stainless. 626 is the common commercial finish, so matching an existing building standard is usually straightforward. Knob design is a separate choice: Elite-Gala, Elite-York, Hana-Gala, Hana-York, Troy-Gala, and Troy-York.
How fast can I get the Falcon X501LD 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 X501LD EG 626 come with a warranty?
Absolutely. The Falcon X501LD 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 X501LD 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 X501LD 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.
!