Schlage Residential F51A North...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$136.00
$73.68
Schlage Residential Schlage Residential F51A - Entry Lock - Northbrook Lever, C Keyway with 16211 Latch and 10063 Strike SCR-F51A-KEYED-NBK

Schlage Residential F51A Northbrook Lever Entry Lock with C Keyway

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Model: F51A NBK 625
$136.00
$73.68
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$136.00
$73.68
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Schlage Residential F51A Northbrook Lever Entry Lock with C Keyway

Professional Residential Entry Lock Solution

The Schlage Residential F51A Northbrook Lever Entry Lock combines Grade 2 commercial-grade security with residential design aesthetics. This single cylinder entry lock features a 5-pin C keyway cylinder with dual backset compatibility for 2-3/8" or 2-3/4" installations, accommodating door thicknesses from 1-3/8" to 1-3/4". Constructed with zinc and steel components and certified to ANSI/BHMA A156.2-2017 Commercial Grade 2 and ANSI/BHMA A156.39-2015 Residential Grade AAA standards.

Professional Features & Benefits

  • Door Thickness Compatibility: Accommodates 1-3/8" to 1-3/4" doors with dual backset options for 2-3/8" or 2-3/4" installations.
  • Grade 2 Commercial Construction: Zinc and steel construction meets ANSI/BHMA A156.2-2017 Commercial Grade 2 standards for enhanced durability and security.
  • Dual Certification Standards: ANSI/BHMA A156.2-2017 Commercial Grade 2 and ANSI/BHMA A156.39-2015 Residential Grade AAA certified with UL Listed option for 3-hour fire door applications.
  • Universal Installation Design: Easy 3-step installation requires only a screwdriver with universal latch and dual backset compatibility.
  • Professional Latch System: 1" x 2-1/4" latch with 1/4" radius corner faceplate, 7/8" housing diameter, and 1/2" throw for reliable latching performance.
  • Keyed Entry Function: Single cylinder operation unlocks when door is opened from inside, with manual turnbutton override and exterior key control for convenient access management.
  • Complete Hardware Package: Includes 16211 latch assembly and 10063 strike with 1-5/8" x 2-1/4" radius corner full lip design.
  • Manufacturer Warranty: 10 Year warranty coverage for added confidence and long-term protection.

Standard Features

Certification: ANSI/BHMA A156.2-2017 Commercial Grade 2; ANSI/BHMA A156.39-2015 Residential Grade AAA; Available UL Listed for 3-hour fire door (F10, F40 (CSV Only), F51A, F80 functions).
Latch: 1"x 2-1/4", 1/4" radius corner faceplate, 7/8" housing diameter, 1/2" throw, circular drive-in included, universal latch
Strike: 1-5/8" x 2-1/4" radius corner, full lip, no box
Backset: Dual backset latches, fits either 2-3/8" or 2-3/4" backsets
Cylinder: 5-Pin, C keyway, keyed alike (KA4)
Door Range: 1-3/8" – 1-3/4"
Keys: Two per lock, 5-pin, C section

Installation & Operation

  1. Review manufacturer specifications and verify door preparation requirements including door thickness between 1-3/8" and 1-3/4", and determine appropriate backset (2-3/8" or 2-3/4").
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door surfaces for the cylindrical lock installation.
  3. Prepare door by drilling required holes per manufacturer specifications for the lock body, latch, and strike plate installation.
  4. Install the 16211 latch assembly and 10063 strike plate, securing all mounting hardware per manufacturer torque specifications.
  5. Install the lock mechanism and adjust the keyed cylinder and interior turnbutton for proper alignment and smooth operation.
  6. Test lock operation from both interior and exterior sides to verify proper function of the keyed entry mechanism and make final adjustments as needed. Refer to manufacturer documentation for complete installation details and troubleshooting.

Professional Applications

  • Residential Entry Doors
  • Multi-Family Housing Units
  • Apartment and Condominium Complexes
  • Single-Family Home Security
  • Residential Property Management
  • Home Builder and Contractor Projects
  • Residential Renovation and Upgrade Projects

Why Choose Schlage Residential Quality?

Schlage Residential F Series entry locks deliver professional-grade reliability with zinc and steel construction certified to both Commercial Grade 2 and Residential Grade AAA standards. The 10 Year warranty coverage and dual certification provide confidence in long-term performance. Engineered for demanding residential applications where dependable security and convenient operation are essential.

ANSI/BHMA Grade 2 rated mechanical knob or lever with solid brass construction and SecureKey re-keyable cylinder. Support Resources: Manuals Hub: Schlage Manuals, Installation Guides & Templates (https://www.schlage.com/en/home/support/installation-manuals-templates.html) || Installation Guides: F-Series Knob and Lever Installation Instructions (https://www.schlage.com/content/dam/sch-us/documents/pdf/installation-manuals/P515-302.pdf) || Door Prep Templates: F10/F40/F51 Knob and Lever Door Prep Template (https://www.schlage.com/content/dam/sch-us/documents/pdf/installation-manuals/P513-593.pdf) || FAQs & Support: Schlage Product FAQs (https://www.schlage.com/en/home/support/faqs.html)

Manufacturer Resources

Product Specs

Series:
F Series
Subcategory:
Bored Locksets
Grade:
Grade 2
Warranty:
10 Year
Standard Strike:
10-027: Full Lip Radius Strike, 2-1/4" x 1-5/8"
Standard Latch:
16-086: Dead Latch, Dual Option (Round, Drive-in)
Keyed Function:
Single Cylinder
ANSI/BHMA:
F81
Product Group:
Mechanical Locks
Product Subgroup:
Bored Locksets
Keyed:
Yes
Electronic:
No
Commercial/Residential:
Residential
Function Description:
Keyed entry function unlocks when door is opened from the inside, allowing you to leave quickly, conveniently and re-enter easily; Locked by inserting key and rotating cylinder from outside, or manually rotating interior turnbutton after exit
Lock Type:
Cylindrical
Lock Function:
Single Cylinder
Product Type:
Bored Locksets
Handle Design:
Northbrook Lever
Handle Type:
Lever
Product Attribute:
Cylindrical Locks
Product Model:
F51A
Product Function:
Entrance
Door Hand Direction:
Non-Handed
Door Thickness Range:
1-3/8" to 1-3/4"
Product Category:
Mechanical Locks
Product Substrate:
Zinc and Steel
Department:
Door Hardware

Schlage Residential F51A NBK 625 – Frequently Asked Questions

1) Will the Schlage F51A Northbrook lever fit a 1-3/8 inch interior door, or does it need a 1-3/4 inch door?
Either one. The F51A covers a door thickness range of 1-3/8 to 1-3/4 inches, so it works on both the thinner older interior doors and the standard 1-3/4 inch commercial and exterior door. No spacer kit or thickness suffix to specify.
2) My doors are bored at 2-3/8 inch backset and some at 2-3/4 inch. Do I have to order two different Schlage F51A locks?
One part number covers both. The F51A ships with a dual backset latch (the 16-086 dead latch, round and drive-in options included) that adjusts to either 2-3/8 or 2-3/4 inches, so a property manager buying for a mixed building orders a single lock and sets the backset at install. That is the whole reason to standardize on this one across a fleet of doors.
3) Is the Schlage F51A lever handed? Do I need to specify left or right?
Non-handed. The F51A Northbrook lever installs on a left or right hand door without ordering a hand or field-reversing anything, so one lock covers every opening in the building.
4) Will the Schlage F51A latch into the strike plate already in my door frame?
Usually, if that frame is prepped for a standard residential cylindrical lockset. The F51A latch throws 1/2 inch and the latch face is 1 x 2-1/4 inches with a 1/4 inch radius corner. The 10-027 strike that comes with it is a full lip radius strike, 2-1/4 x 1-5/8 inches, with no box. If your existing strike is a square corner or a T-strike, swap in the supplied one; the frame cutout for radius corner strikes is the common one on residential jambs.
5) Can I get several Schlage F51A locks keyed alike so one key opens all the units?
Yes, keying is a required selection when you order. Choose KD keyed different (standard), KA keyed alike for multiple locks, or none if you want it supplied less cylinder to fit your own. There is also an optional key code field if you are matching an existing bitting on site. The cylinder is 5-pin C keyway with two keys per lock, so it keys into an existing Schlage C system.
6) Is the Schlage F51A rated for a fire door?
There is a UL Listed option for 3-hour fire doors covering the F51A function, so the fire rated version has to be specified as such. The standard residential build is not the fire door assembly. If the opening is a rated corridor or stairwell door, order the UL Listed variant and keep the listing paperwork with the door.
7) What replaces a Schlage F51A Northbrook entry lock when the door needs credential access instead of keys?
The Schlage F51A Northbrook is a mechanical, non-electronic lock: access is by key from outside on a 5-pin C keyway. When an opening needs card or phone credentials instead, the Paxton PaxLock Pro Galaxy lever latch lock is a battery powered lever lock with a dual frequency reader at 13.56 MHz and 2.4 GHz, Bluetooth, AES128 encryption, and UL, FCC and ISED listings. It fits a 1-3/4 inch door thickness, so on doors thinner than that the F51A remains the fit, since it covers 1-3/8 inch to 1-3/4 inch.
8) What is the closest Grade 2 alternative to the Schlage F51A Northbrook lever entry lock if the opening needs a handleset instead of a lever?
The Schlage F51A Northbrook is a Grade 2 keyed-entry cylindrical lockset with a lever, so it drops into a standard bored door prep. When the door calls for an exterior gripped handleset instead, the Delaney Katana single cylinder handleset is also Grade 2 and single cylinder, and the Bravura 973-Montgomery handleset is Grade 2 and pairs with a 939-Charlotte interior lever, so the inside of the door keeps lever operation. Both are handlesets, which take a different exterior door prep than a bored cylindrical lockset, so confirm the door is prepped or can be re-prepped before substituting.
9) Can an Emtek Select Brass Conical Stem Dark Walnut knob be used in place of a Schlage F51A Northbrook entry lock?
No, the functions are different. The Schlage F51A Northbrook is keyed with a single cylinder, unlocking when the door is opened from the inside and locking by key from outside or by the interior turnbutton. The Emtek Select Brass Conical Stem Dark Walnut knob is a passage, hall and closet function, which latches but does not lock and takes no key. Use the Emtek knob on interior openings that only need latching, and keep the F51A where the door has to be secured.
10) How does the F51A entry function actually work day to day, and can a tenant lock themselves out?
Keyed entry, single cylinder. The inside lever is always free to exit. Turn the interior turnbutton before you pull the door shut and the outside lever stays locked; the key retracts it from outside. Opening the door from the inside releases the lock, so it does not stay dogged locked behind you unless you set it again. A tenant who leaves with the button turned and no key is locked out, which is the normal behavior for this function and why buildings key these alike or keep a master.
11) Is a Grade 2 lever like the Schlage F51A strong enough for apartment entry doors that get heavy use?
Grade 2 is the middle ANSI/BHMA tier and it is what most multi-family entry doors run. The F51A is certified to ANSI/BHMA A156.2-2017 Commercial Grade 2 and A156.39-2015 Residential Grade AAA, with zinc and steel construction, function code F81. For a unit entry door in an apartment or condo that is the normal specification. For a high-traffic building main entrance or an institutional corridor, step up to a Grade 1 commercial cylindrical lock instead.
12) What finishes and rose styles does the Schlage F51A Northbrook lever come in?
Four finishes, each in three rose shapes. Finishes are 619 satin nickel, 622 matte black, 625 bright chrome, and 716 aged bronze. Rose designs are Kinsler, Collins, and Upland, and all three roses are available in all four finishes, so you can match the trim shape on the rest of the doors and still get the finish the design calls for.
13) Does the Schlage F51A come with the latch and strike, or do I need to buy those separately?
Both are in the box. You get the 16-086 dual option dead latch (round and drive-in, so you can use it in a bored hole or a drive-in prep without a face plate mortise) and the 10-027 full lip radius strike at 2-1/4 x 1-5/8 inches. The strike has no box, so if your jamb needs a dust box for the bolt pocket that is a separate item. Installation needs only a screwdriver once the door is prepped.
14) Should I use a lever entry lockset like the Schlage F51A or a handleset on my front door?
Different jobs. The F51A is a bored cylindrical lever that does the whole entry function in one bore, keyed outside with a turnbutton inside, and it is the fast choice for unit doors, back doors, and anywhere you want lever operation. A handleset gives you an exterior grip plate with a separate deadbolt above and is the usual look for a main front entry. ZenSupply carries handsets in that style, including the Grade 2 Bravura 973-Montgomery with a 939-Charlotte interior lever, the Bravura 971-Austin, and the Grade 2 Delaney Katana single cylinder handleset. Note the F51A is a lever lock and does not include a deadbolt, so if you want deadbolt security on that opening you are adding one either way.
15) What is a Grade 2 alternative to the Schlage F51A if I want a matching handleset on the same building?
For Grade 2 in a handleset format, the Bravura Savannah 913, Jacksonville 915, Austin 971, and Montgomery 973 are all Grade 2, as is the Delaney Katana single cylinder handleset. The Callan Visconti and Callan Briona handsets are Grade 3, a step down in the ANSI/BHMA scale from the F51A. None of those are Schlage C keyway, so mixing them into a building already keyed on Schlage C means a second key system.
16) Can I add a deadbolt to the same door as the Schlage F51A and have it use the same key?
The F51A is a keyed lever only, so a deadbolt is a separate purchase. ZenSupply carries the Delaney Traditional and Delaney Contemporary Grade 3 single cylinder deadbolts, both cylinder by thumbturn. Those are separate key systems from the Schlage C keyway on the F51A, so they will not key alike with it. If you want one key for both the lever and the deadbolt on that door, stay within Schlage C keyway hardware.
17) Is a Callan Visconti or Briona handleset an equivalent swap for a Schlage F51A Northbrook entry lock?
They are not a like-for-like swap on two counts. The Schlage F51A Northbrook is a Grade 2 lever lockset, while the Callan Visconti and Callan Briona single cylinder handlesets are both Grade 3, a different ANSI/BHMA durability tier. They are also handlesets with a gripped exterior, not a bored lever, so the exterior door prep differs. For a facility standardizing on a single durability tier across a fleet of doors, matching the Grade 2 F51A with another Grade 2 lock keeps the spec consistent.
18) What should I add alongside a Schlage F51A Northbrook entry lock for a second point of locking on the same door?
The Schlage F51A Northbrook handles the latching and keyed entry function on its own, with a single cylinder and an interior turnbutton. Where the opening also calls for a deadbolt above the lockset, the Delaney Traditional and Delaney Contemporary round deadbolts are both Grade 3 single cylinder deadbolts with a cylinder by thumbturn function, so the outside takes a key and the inside takes a thumbturn, matching how the F51A is operated from each side. The deadbolts are keyed separately from the F51A C keyway cylinder, so specify keying on both if one key is meant to run the door.
19) If I need a matching exterior handleset on the front door and Schlage F51A Northbrook levers on the rest, what pairs with it?
The Schlage F51A Northbrook is a Grade 2 keyed entry lever that carries through interior and secondary entry doors in satin nickel, matte black, bright chrome and aged bronze. For the main entry, the Bravura Savannah, Jacksonville and Austin handlesets are all Grade 2 single cylinder handlesets with a 615 interior plate and a 906-Macon interior knob, and the Bravura Montgomery handleset is Grade 2 with a 939-Charlotte interior lever. Matching the Montgomery keeps a lever on the inside of every door in the run; the other three put a knob on the inside of the entry door.
20) For a multi-family turn where levers are required for accessibility, which of the comparable entry locks fits?
The Schlage F51A Northbrook is a non-handed lever with a keyed entry function, so it goes on either hand of door without ordering by handing and gives lever operation on both sides. Among the alternatives, the Bravura 973-Montgomery handleset carries a 939-Charlotte interior lever but a gripped exterior, and the Delaney Avino and Delaney Katana handlesets and the Callan Visconti and Briona handlesets pair their exteriors with interior trim rather than a lever throughout. Where both sides of the door need a lever, the F51A covers it in one part number.
21) Can I order the Schlage F51A without a cylinder so my locksmith can install our own?
Yes. The keying selector includes a less cylinder option alongside keyed different and keyed alike, which is how a locksmith or integrator supplies a lock body into an existing masterkey system rather than adding another key to the building.
How fast can I get the Schlage Residential F51A NBK 625 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 Schlage Residential F51A NBK 625 come with a warranty?
Absolutely. The Schlage Residential F51A NBK 625 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 Schlage Residential F51A NBK 625?
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 Schlage Residential F51A NBK 625 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.

Product Reviews

  • 4
    Schlage lock

    Posted by Tyler Coviello on May 14th 2025

    The Northbrook lever design provides a contemporary and comfortable grip, fitting well with a variety of interior and exterior aesthetics. As a keyed entry lock, it provides security from the exterior with a key, while the interior typically features a turn-button for easy locking and unlocking.

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