Falcon D121 Grade 1 Heavy-Duty...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$179.00
$116.27
Falcon Falcon D121 Single Cylinder x Rose Function - Grade 1 Heavy-duty Deadbolt Locks FAL-D121

Falcon D121 Grade 1 Heavy-Duty Single Cylinder Deadbolt with Blank Rose

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Model: D121P 626
$179.00
$116.27
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$179.00
$116.27
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Falcon D121 Grade 1 Heavy-Duty Single Cylinder Deadbolt with Blank Rose

Professional-Grade Security for Commercial Applications

The Falcon D121 deadbolt delivers Grade 1 certified performance with single cylinder x blank rose configuration for demanding commercial environments. Featuring a solid sintered steel bolt with hardened steel anti-saw pin, adjustable 2-3/8" or 2-3/4" backset, and 1-3/8" to 1-7/8" door thickness compatibility. ANSI/BHMA A156.5 Grade 1 certification ensures reliable operation in institutional, government, military, hospital, office and retail applications.

Professional Features & Benefits

  • Door Compatibility: Accommodates door thickness from 1-3/8" to 1-7/8" with adjustable backset of 2-3/8" or 2-3/4" for versatile installation options.
  • Heavy-Duty Construction: Solid sintered steel bolt with hardened steel anti-saw pin insert provides maximum security against forced entry attempts.
  • Grade 1 Durability: ANSI/BHMA A156.5 Grade 1 certification ensures reliable performance in high-traffic commercial applications.
  • Anti-Pry Protection: Free spinning, tapered trim ring resists wrenching and prying attacks while integrated security shield protects bolt from ice-pick attacks.
  • Reinforced Installation: Metal dust box reinforcer with three 3" screws anchors deep into wood door frames to protect against kick-in attacks.
  • Adjustable Backset Design: Lock-in-place helix design allows field adjustment between 2-3/8" and 2-3/4" backsets without disassembly.
  • Professional Keying Options: Available in Conventional and SFIC formats with G keyway standard, plus factory master keying available on Schlage C keyways.
  • Complete Installation Package: Includes 1-1/8" x 2-1/4" square corner faceplate, 1-1/8" x 2-3/4" square corner strike, and two nickel silver cut keys.

Technical Specifications

  • ANSI/BHMA: A156.5, 2001, Grade 1
  • Commercial/Residential: Commercial
  • Cylinder and Keyways: G Keyway
  • Department: Door Hardware
  • Duty Level: Heavy Duty
  • Electronic: No
  • Grade: Grade 1
  • Keyed: Yes
  • Keyed Function: Single Cylinder
  • Keys Included: 2
  • Lock Function: Deadbolt
  • Product Attribute: Deadbolts
  • Product Category: Mechanical Locks
  • Product Function: Cylinder x Blank Rose
  • Product Group: Mechanical Locks
  • Product Model: D121
  • Product Subgroup: Bored Locksets
  • Product Type: Deadbolts
  • Series: D100 Series
  • Standard Strike: Square Corner with metal dust box, 1-1/8" x 2-3/4"
  • Subcategory: Deadbolts

Installation & Operation

  1. Review manufacturer specifications and verify door preparation requirements including door thickness between 1-3/8" and 1-7/8", and determine appropriate backset setting of 2-3/8" or 2-3/4".
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces for the 1" housing diameter deadbolt.
  3. Prepare door and frame by drilling required holes and routing as specified in manufacturer instructions for the 1-1/8" x 2-1/4" faceplate.
  4. Install the metal dust box reinforcer with three 3" screws and secure the deadbolt assembly to door per manufacturer torque specifications.
  5. Adjust the lock-in-place helix backset design for proper alignment and verify smooth operation of the 1" throw deadbolt.
  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

  • Institutional Facilities
  • Government Buildings
  • Military Installations
  • Healthcare Institutions
  • Commercial Office Buildings
  • Retail Establishments
  • Educational Facilities

Why Choose Falcon Quality?

Falcon D121 deadbolts deliver professional-grade reliability with solid sintered steel construction and hardened steel anti-saw pin protection rated for Grade 1 commercial applications. ANSI/BHMA A156.5 certification and metal dust box reinforcement with three 3" screws ensure dependable security performance. Engineered for demanding institutional and commercial environments where maximum security and reliable operation are essential.

Product Specs

Series:
D100 Series
Subcategory:
Deadbolts
Grade:
Grade 1
Duty Level:
Heavy Duty
Keyed:
Yes
Keys Included:
2
Standard Strike:
Square Corner with metal dust box, 1-1/8" x 2-3/4"
ANSI/BHMA:
A156.5, 2001, Grade 1
Product Group:
Mechanical Locks
Product Subgroup:
Bored Locksets
Product Type:
Deadbolts
Electronic:
No
Keyed Function:
Single Cylinder
Commercial/Residential:
Commercial
Cylinder and Keyways:
G Keyway
Lock Function:
Deadbolt
Product Attribute:
Deadbolts
Product Model:
D121
Product Function:
Cylinder x Blank Rose
Product Category:
Mechanical Locks
Department:
Door Hardware

Falcon D121P 626 – Frequently Asked Questions

1) Will the Falcon D121 deadbolt fit a 1-3/8 inch door, or does it need a 1-3/4 inch commercial door?
Both work. The D121 covers door thickness from 1-3/8 inches through 1-7/8 inches, so it goes on older 1-3/8 inch interior doors, standard 1-3/4 inch commercial doors, and the thicker 1-7/8 inch slabs without a special order. Backset adjusts in the field between 2-3/8 and 2-3/4 inches using a lock-in-place helix, so you do not have to know which prep is in the door before you order.
2) What does cylinder x blank rose mean on the Falcon D121, and can I get out from the inside?
There is no thumbturn. The D121 is keyed on the outside and has a blank plate on the inside, so the bolt can only be thrown or retracted with a key from the exterior side. That is the right function for a storeroom, mechanical room, stockroom or exterior door where you do not want the bolt operated from inside, and it is the wrong choice for any opening someone occupies. For a keyed-outside, thumbturn-inside deadbolt, the Accentra D111 or the Dexter DB1000 single cylinder are cylinder x thumbturn in Grade 1.
3) Is the Falcon D121 deadbolt actually Grade 1, and what standard is that under?
ANSI/BHMA A156.5, 2001, Grade 1, and it is built as a commercial heavy duty lock rather than a residential one. For an institutional or MRO spec that calls out Grade 1 auxiliary locks, the D121 meets it on paper. Most of the deadbolts a buyer compares it against are Grade 2 or Grade 3 (the Arrow DBX61 and Cal-Royal CB160 are Grade 2, the Cal-Royal ED500 and LSD are Grade 3), so if the drawing says Grade 1, those are not substitutions.
4) Can I key the Falcon D121 into my existing Falcon system, or order it less core for my own SFIC?
Two cylinder choices. P is a 6-pin conventional cylinder in the G keyway, which is Falcon's standard keyway, and it is the default. B is less SFIC, meaning the housing is prepped for a small format interchangeable core and ships without one, so a locksmith drops in the facility's own core. Factory master keying is available on Schlage C keyways. On the order you also set keying: KD keyed different is standard, KA keys a group of locks alike for a building, and None goes with the less cylinder option. Conventional cylinder orders include two nickel silver cut keys.
5) What is the closest Grade 1 commercial deadbolt to the Falcon D121 if the opening needs a thumbturn on the inside instead of a blank rose?
The Falcon D121 is a single cylinder deadbolt with a cylinder x blank rose function, so the inside face is a plain rose with no turn - key access only, from the outside. When the inside needs to be operated without a key, the Accentra D111 is a Grade 1 single cylinder deadbolt with a cylinder x thumbturn function and a 1-3/8 inch to 1-3/4 inch door thickness range, and the Dexter DB1000-SCT is a Grade 1 single cylinder deadbolt with a cylinder x thumbturn function covering 1-3/8 inch to 1-7/8 inch door thickness. Both give you the same Grade 1 certification level with an inside turn. The blank rose configuration is normally specified where egress is handled by another device or where free inside operation is deliberately not wanted, so confirm the egress path with the code official before swapping functions.
6) Which deadbolt keys on both sides instead of the Falcon D121, and what does that change?
The Falcon D121 is keyed on one side only - single cylinder, cylinder x blank rose. For an opening that must be keyed from both faces, the Design Hardware D1 Series is a Grade 1 extra heavy duty double cylinder deadbolt for 1-3/4 inch doors, and the Dexter DB1000-DCT is a Grade 1 double cylinder deadbolt covering 1-3/8 inch to 1-7/8 inch door thickness. A double cylinder requires a key to retract the bolt from the inside as well, which is restricted on many egress doors, so verify the door's occupancy and egress classification first. If the goal is simply to deny inside key-free retraction rather than to key both faces, the D121 blank rose already does that without a second cylinder.
7) Is a Grade 2 deadbolt like the Arrow DBX61 or Hager 3215 an acceptable stand-in for a Falcon D121?
They are not the same certification level. The Falcon D121 carries ANSI/BHMA A156.5, 2001, Grade 1 and is specified as heavy duty commercial. The Arrow DBX61 is a Grade 2 single cylinder deadbolt with a cylinder x thumbturn function, and the Hager 3215 is a Grade 2 single cylinder deadbolt with a 1 inch throw for 1-3/8 inch to 1-3/4 inch doors. Where a drawing or facility standard calls out Grade 1 - the institutional, government, military and healthcare work the D121 is built for - a Grade 2 substitution will not satisfy the callout. Where the spec is silent and traffic is light, Grade 2 is a legitimate choice, and the Hager 3215 also carries a fire rating.
8) What Grade 1 deadbolt should be used on a door thicker than 1-7/8 inches?
The Falcon D121 accommodates door thickness from 1-3/8 inches to 1-7/8 inches, which covers standard 1-3/4 inch commercial doors but stops short of thicker leaves. For an opening above that range, the Corbin Russwin DL3011 is a Grade 1 cylindrical deadlock with a cylinder x blank configuration and a 1-3/4 inch to 2-1/4 inch door thickness range - it holds the same blank-inside arrangement as the D121 while reaching the thicker door. Measure the actual leaf at the bore location before ordering, since applied panels and cladding push some doors past the nominal thickness.
9) What is the equivalent of the Falcon D121 that keeps the keyed outside and blank inside?
The defining trait of the Falcon D121 is its cylinder x blank rose function - keyed outside, plain rose inside. Among Grade 1 cylindrical deadlocks, the Corbin Russwin DL3211 is a Grade 1 cylindrical deadlock with a cylinder x blank configuration and a deadbolt function for 1-3/4 inch doors, and the Corbin Russwin DL3011 carries the same cylinder x blank arrangement across a 1-3/4 inch to 2-1/4 inch range. The Corbin Russwin DL2211 is also a Grade 1 cylindrical deadlock, cylinder x blank, for 1-3/4 inch doors, but it is a classroom function rather than a straight deadbolt. Match on both the blank inside and the function line, not the blank inside alone.
10) How far does the Falcon D121 bolt throw, and how well does it hold in a wood frame?
One inch of throw on a solid sintered steel bolt with a hardened steel anti-saw pin insert. The reinforcement matters as much as the bolt: it ships with a metal dust box reinforcer and three 3 inch screws that reach past the jamb into the framing, which is what resists a kick-in on a wood frame. The trim ring is free spinning and tapered to resist wrenching, and a shield inside protects the bolt from ice-pick attacks.
11) What finishes does the Falcon D121 deadbolt come in for matching the rest of a building's hardware?
Five: 605 bright brass, 606 satin brass, 613 satin bronze oil-rubbed, 625 bright chrome, and 626 satin chrome. Every one of those is available with either the conventional G keyway cylinder or the less SFIC housing, so a property manager standardizing a floor can hold one finish across both keying approaches. Note that if you want the circular drive-in bolt instead of a square corner faceplate, that option is 626 only.
12) What is the closest equivalent to the Falcon D121 if I need the same function from a different manufacturer?
For the same keyed-outside, blank-inside arrangement in Grade 1, look at the Corbin Russwin DL3211 cylindrical deadlock, cylinder x blank, for 1-3/4 inch doors, or the DL3011 for 1-3/4 to 2-1/4 inch doors. If the opening actually wants a thumbturn inside, the Grade 1 options are the Accentra D111 with a 2-3/8 inch backset, the Dexter DB1000 single cylinder for 1-3/8 to 1-7/8 inch doors, the Delaney LM Series less core in dull chrome, or the Deltana CL200LM. The Dexter is the one that matches the D121's door thickness range exactly.
13) Can I key a run of Falcon D121 deadbolts alike so one key opens all the storerooms in a building?
Yes, order KA keyed alike rather than the standard KD keyed different, and the set comes cut to one key. That is the usual choice for an MRO or property management order covering a group of storage or mechanical doors. If the facility runs an SFIC master system already, take the B less SFIC option instead and pin your own cores, which keeps the doors inside the existing hierarchy rather than starting a second key system. There is also a free text field on the order for special cylinder or keying requirements.
14) Does the Falcon D121 come with everything needed to install it, or do I need to buy the strike separately?
It is a complete package. A 1-1/8 x 2-1/4 inch square corner faceplate, a 1-1/8 x 2-3/4 inch square corner strike with metal dust box, three 3 inch screws for the frame, and two nickel silver cut keys all ship with the conventional cylinder version. Housing bore is 1 inch. The one thing to settle before it goes on the door is which of the two backsets, 2-3/8 or 2-3/4 inches, matches the cross bore, and that is a field adjustment on the helix rather than a different part number.
15) Is a deadbolt like the Falcon D121 the right thing for a door that also needs a latch, or do I need a lockset?
A deadbolt only throws a bolt, it has no latch and no knob or lever, so a door with a D121 on it still needs a separate latch or lockset to keep it closed. It is an auxiliary lock: use it to add a second point of security above a lockset, or on a door that stays shut on its own. If you want the deadbolt and the handle in one case, that is a mortise lock rather than a bored deadbolt. The D121 itself is purely mechanical, with no electronic option, so for card or code access on the same opening you are looking at a different product entirely.
16) What Grade 1 deadbolt takes a small format interchangeable core besides the Falcon D121 less-core option?
The Falcon D121 is offered in a B - Less SFIC cylinder configuration for facilities that stock and install their own small format cores, alongside the P 6-pin conventional cylinder in the G keyway. Other core-ready options include the Delaney LM Series, a Grade 1 single cylinder less core deadbolt with a cylinder x thumbturn function in dull chrome US26D, and the Arrow E61 26D IC, a Grade 2 single cylinder deadlock prepped for SFIC less core for 1-3/8 inch to 1-3/4 inch doors. If the facility is already standardized on an SFIC keying system, ordering less core keeps the new bolt on the existing master key hierarchy.
17) What deadbolt should be used on a stairwell or exit door where no key is wanted on either side?
The Falcon D121 is a keyed single cylinder deadbolt, so it is the wrong device where the bolt should throw without a key at all. The Arrow E60 is a Grade 2 non-keyed exit deadlock with a blank plate x thumbturn function for 1-3/8 inch to 1-3/4 inch doors - blank on the outside face, turn on the inside, which is the reverse of the D121 arrangement. Use the E60 where occupants need to secure the door from inside and outside key access is deliberately excluded; use the D121 where the door is controlled by key from the outside.
18) Is a mortise deadbolt like the Dormakaba D900 interchangeable with the Falcon D121?
No - the door prep is different. The Falcon D121 is a bored deadbolt installed through a cross bore with a 1-1/8 inch by 2-1/4 inch square corner faceplate and an adjustable 2-3/8 inch or 2-3/4 inch backset. The Dormakaba D900 is a small case mortise deadbolt with a cylinder x thumbturn function, which requires a mortise pocket routed into the door edge, and the Emtek 2050 and 2051 are European mortise deadbolts with an integrated roller latch. A mortise body cannot drop into a bored prep, and a bored bolt will not fill a mortise pocket. Match the substitute to the prep already in the door unless you are replacing the door or the leaf edge.
19) What is the difference between the Falcon D121 and an electronic deadbolt like the Codelocks CL2200 or Dormakaba Saffire LX-D?
The Falcon D121 is a mechanical, non-electronic deadbolt keyed on the G keyway with two nickel silver cut keys supplied. The Codelocks CL2200 is a medium duty electronic surface deadbolt, the Codelocks CL200 is a light duty surface deadbolt with key override, and the Dormakaba Saffire LX-D is an RFID electronic deadbolt with BLE and electronic lock override. Electronic units add credential management and audit capability but introduce power and programming into the maintenance cycle. Where the facility runs a mechanical master key system and wants nothing to battery-manage across hundreds of doors, the D121 stays on the existing key hierarchy.
20) Which Grade 1 deadbolt should be specified when the opening needs a fire rated latch?
The Cal-Royal CRB800 is a Grade 1 heavy duty single cylinder deadbolt with a UL 3-hour fire rated latch and a cylinder x thumbturn function. On the Hager side, the 3118 is a Grade 1 classroom deadbolt with a Schlage C keyway and 6-pin cylinder, fire rated, for 1-3/8 inch to 1-3/4 inch doors. The Falcon D121 is the ANSI/BHMA A156.5, 2001 Grade 1 choice where the requirement is heavy duty commercial security with a blank inside rose. Confirm the assembly listing on the specific opening with the AHJ, since the rating applies to the whole door, frame and hardware assembly.
21) What is a lighter duty alternative to the Falcon D121 for interior or low-traffic doors?
The Falcon D121 is a heavy duty Grade 1 deadbolt built for institutional, government, military, hospital, office and retail traffic. For a low-traffic interior or storage door where that certification level is not required, the Cal-Royal ED500 is a Grade 3 single cylinder deadbolt with an adjustable backset covering 1-3/8 inch to 1-3/4 inch doors, and the Cal-Royal LSD is a Grade 3 single cylinder deadbolt with an ADA ergonomic thumbturn over the same thickness range. The LSD is the one to look at where the inside turn needs to be operable without tight grasping.
22) Which Grade 1 deadbolts besides the Falcon D121 will fit both a 1-3/8 inch and a 1-3/4 inch door across a mixed property?
The Falcon D121 accommodates 1-3/8 inch through 1-7/8 inch doors with a field-adjustable 2-3/8 inch or 2-3/4 inch backset, so one part number covers a building with mixed leaf thicknesses and mixed bore locations. Among Grade 1 peers, the Dexter DB1000-SCT covers the same 1-3/8 inch to 1-7/8 inch range with a cylinder x thumbturn function, its double cylinder counterpart the DB1000-DCT covers 1-3/8 inch to 1-7/8 inch as well, and the Accentra D111 covers 1-3/8 inch to 1-3/4 inch. For a portfolio standardized on a single SKU, the wider ranges reduce how many variants have to sit on the shelf.
23) Can a Baldwin or Emtek decorative deadbolt replace a Falcon D121 on a commercial opening?
They serve different jobs. The Falcon D121 is a commercial heavy duty deadbolt carrying ANSI/BHMA A156.5, 2001 Grade 1 for institutional and government work. The Baldwin Estates 8011 is a contemporary 1-5/8 inch double cylinder deadbolt in the Estate Series, the Baldwin Reserve Double Cylinder Contemporary Round is a double cylinder deadbolt, and the Emtek #11 Tuscany is a lost wax cast bronze deadbolt with a cylinder x thumbturn function. Those are architectural trim products chosen for appearance on entrances. Where the spec calls out a certified Grade 1 commercial deadbolt, the D121 answers the callout; where the door is a front entry judged on finish and profile, the decorative lines do.
24) What deadbolt handles a storefront or hollow metal door that needs a hook bolt instead of a straight throw?
The Falcon D121 throws a straight 1 inch solid sintered steel bolt into a square corner strike with metal dust box. On sliding or narrow stile openings where a straight bolt cannot resist the pull direction, the International Door Closers DH-1821 is a hook bolt deadlock with a flat faceplate, and the DT-1851 is a long throw deadlatch with a flat faceplate. A hook bolt engages the keeper mechanically rather than relying on throw depth alone. Choose by how the door moves - swinging leaves suit the D121 straight bolt, sliding and narrow stile openings often need the hook.
25) Is the BEST 8T tubular deadbolt tube component or the Arrow 460 strike a substitute for the Falcon D121?
Neither is a complete lock. The BEST 8T is a T Series tubular deadbolt tube component, and the Arrow 460 is a mortise lock strike for latchbolt and deadbolt functions with a straight lip for 1-3/4 inch doors - a strike, not a bolt. The Falcon D121 is a complete single cylinder deadbolt supplied with a 1-1/8 inch by 2-1/4 inch square corner faceplate, a 1-1/8 inch by 2-3/4 inch square corner strike and two cut keys. Order the component parts only when you are servicing an existing lock, not when you are securing a bare door.
How fast can I get the Falcon D121P 626 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 Falcon D121P 626 come with a warranty?
Absolutely. The Falcon D121P 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 D121P 626?
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Product Reviews

  • 5
    EXCELLENT

    Posted by JOSE AGUILAR on Mar 18th 2025

    I am very satisfied with this deadbolt, the service from Zensupply is the best.

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