Schlage Commercial 21-003 6-Pi...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$111.31
Schlage Commercial 21-003 6-Pin Standard Key-in-Knob Cylinder for Schlage A85/H185 Knobs Less Orbit

Schlage Commercial 21-003 6-Pin Standard Key-in-Knob Cylinder for Schlage A85/H185 Knobs Less Orbit

(No reviews yet) Write a Review

Model: 21-003 S123 626
$111.31
Selected Finish is
Selected Keying is

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

$111.31
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

Schlage Modular Cylider Overview

One cylinder is the foundation for every lock you need, add more flexibility with less inventory dollars, and make your job easier, faster and more profitable.
Now you can service almost any lock on any door with just one cylinder. Simply by adding or changing the front and back housing you can convert a modular cylinder into multiple cylinder types, including mortise, rim and key-in-lever. The revolutionary Schlage® Modular cylinder will dramatically reduce your inventory because you will be able to make almost any cylinder type from a series of modular components and parts.
Now, one cylinder changes everything.

Our modular cylinder is the foundation for every lock you neeS

  • One cylinder converts to three differnt cylinder types by changing the tailpiece, cam or rear housing
  • Accomadates thicker doors with six available lengths of rear housing sizes
  • Front housing available in all finishes to match the locks
  • Supports interchangeability between Everest 29™, Primus®XP, and Classic key systems
  • Fewer parts required to fill orders means less inventory and lower costs
  • Never be caught on the job without the right part

One cylinder really does fit all

Thanks to the extraordinary versatility of the Schlage® modular cylinder you’ll never be caught on the job again without the right part. You’ll be able to assemble almost any Schlage cylinder on the spot, while providing your customers the same security, toughness and quality that has made Schlage one of the best names in the business.

  • Adaptable to mortise, rim and key-in-lever or key-in-knob applications
  • Available in all Schlage keyways, including Everest 29TM and Primus® XP


DOWNLOADS

Schlage Key Systems, Cylinders and Keys Catalog

Manufacturer Resources

Product Specs

Features:
Accept any Schlage Keyway, Fits all Schlage Locksets and Deadbolts
Warranty:
3 Year
Product Group:
Parts and Accessories
Subcategory:
Parts and Accessories
Product Subgroup:
Cylinders
Product Type:
Cylinders
Keys Included:
2
Commercial/Residential:
Commercial
Cylinder and Keyways:
6-Pin
Compatibility:
Schlage A85/H185 Knobs Less Orbit
Handle Type:
Knob
Parts and Accessories Type:
Replacement Parts
Product Attribute:
Parts and Accessories
Product Model:
21-003
Product Function:
Cylinders
Door Hand Direction:
Non-Handed
Product Category:
Mechanical Locks
Product Substrate:
Brass, Stainless Steel
Department:
Door Hardware

Schlage 21-003 S123 626 – Frequently Asked Questions

1) Can a Schlage key-in-knob cylinder be used on a rim exit device?
Not this one. A rim device needs a rim cylinder with a tailpiece long enough to reach through the door into the chassis, and the 21-003 is set up for A85 and H185 knob trim. The Corbin Russwin 3070 is the rim equivalent, a 6-pin rim cylinder housing with a 1-7/8 inch tailpiece. Worth knowing on the Schlage side: the modular cylinder design converts between mortise, rim and key-in-lever formats by changing the tailpiece, cam or rear housing, with six rear housing lengths to cover thicker doors.
2) Does the Schlage 21-003 come keyed, or does it have to be pinned first?
It ships 0 bitted. The chambers are set to zero cuts, so it will not turn on any key you already carry and it has to go on a keying bench before it goes in the door. Two keys come with it. For a building being standardized, 0 bitted is the point of the part: every cylinder gets pinned to your keyway and your bitting rather than arriving on a random factory key that has to be pulled back out.
3) Which keyway do I order so a Schlage 21-003 works on the key system already in my building?
Order it in the section your existing keys run. The 21-003 is available in the Classic C family (C, C123, C124, C134, C135, C145, C234, C245, C345), the S family (S123, S124, S125, S134, S135, S145, S234, S235, S245, S345), and in CE, E, EF, F, FG and G. The keyway is stamped on the face of your existing key or cylinder, and that stamp is what you match. The cylinder accepts any Schlage keyway, so both standard and restricted sections are on the table.
4) I am replacing the cylinders in every A85 knob in an apartment building. What do I have to specify on the order?
Three things settle it. Keyway, so the new cylinders land on the system you are running. Finish, from 606 satin brass, 622 matte black, 626 satin chrome or 643E aged bronze, matched to the code on the trim you already have rather than by eye. And the fact that these are 0 bitted, which means you need to budget the pinning labor along with the parts. Handing does not split the order, the cylinder is non-handed, and each one arrives with two keys.
5) Can Schlage 21-003 cylinders be master keyed into an existing Everest 29 or Primus XP system?
Schlage's modular cylinder line supports interchangeability between Everest 29, Primus XP and Classic key systems, so the platform is built to sit inside an existing hierarchy rather than force a separate one. Because the cylinder arrives 0 bitted, the change key and master cuts are set when your locksmith pins it, which is how a floor of A85 knobs ends up on one master without anyone touching the knobs themselves.
6) Is the Schlage 21-003 an interchangeable core or a standard cylinder?
Standard 6-pin, not an interchangeable core. There is no control key and no figure-eight core to pull, so rekeying means disassembly on the bench, not a 15-second swap at the door. If your facility runs interchangeable core precisely so maintenance can change a core without a locksmith, buy a core product instead. The BEST 1C Series standard 5-pin cylinder core and the BEST Peaks 1CB 150 Series interchangeable core cylinder are both that kind of part.
7) The lock on the door is a mortise lock. Will a 21-003 thread into it?
No. The 21-003 is a key-in-knob cylinder for Schlage A85 and H185 knobs less orbit, so it seats in the knob rather than in a mortise case. A mortise case takes a threaded mortise cylinder driving a cam. The Detex MC65 is a 1-1/8 inch 6-pin mortise cylinder cut to the Schlage C keyway, which keeps a mortise opening on a Schlage C system. Corbin Russwin offers the 1000 Grade 1 series at 1-1/2 inch with an A02 straight cam, and the 1070 Grade 1 series 1-1/4 inch 6-pin housing with an A01 cloverleaf cam. On any of them the cam has to match what the mortise case expects.
8) Half these openings got levers in the ADA upgrade. What cylinder do those take instead?
The 21-003 is a knob cylinder, sized to Schlage A85 and H185 knobs less orbit, and it is non-handed so hand of door does not enter the order. For a lever, the Falcon A23161-05 G is a key-in-lever cylinder in the RU/T series, 6-pin, G keyway, supplied keyed different with 2 cut keys. The Ilco 1539 is a universal cylinder that covers knob and lever housings from one part. Both alternates change the key system you are keying to, so confirm which system the building is on before mixing them.
9) Is the Schlage 21-003 cylinder built for a high-traffic commercial door?
Brass and stainless steel construction, and it is specified as commercial hardware rather than a residential part. Brass takes the pinning and the key wear, stainless handles the pieces that see load. It is a replacement cylinder, so the job is refreshing the keyed portion of an A85 or H185 knob that is otherwise still serviceable, which keeps a rekey or a key-system change from turning into a full lockset replacement.
10) I stock Kaba Ilco rather than Schlage. What crosses to the Schlage 21-003 for a key-in-knob cylinder?
The 21-003 is a 6-pin key-in-knob cylinder built for Schlage A85 and H185 knobs less orbit, and it accepts any Schlage keyway. On the Ilco side the nearest parts are the 1599 key-in-knob replacement cylinder and the 1539 series key-in-knob / lever universal cylinder. The difference is scope: the 21-003 is cut to a named Schlage knob and to the Schlage keyway family, so it goes onto an existing Schlage key system, while the 1539 is a universal body covering both knob and lever housings. The 21-003 comes 0 bitted with 2 keys, so it is pinned to the system on the bench.
11) The knobs on this wing are Sargent, not Schlage. Does the 21-003 fit them?
It does not. The 21-003 is specified for Schlage A85 and H185 knobs less orbit and takes Schlage keyways. For Sargent knobs and levers, the Kaba Ilco 1579 is the knob and lever cylinder built for Sargent. If the floor is mixed and you want one part number to cover both handle styles, the Ilco 1539 is a universal key-in-knob / lever cylinder rather than a brand-specific one.
12) I need a cylinder for the rim device on the stair door. Is the 21-003 the right part for that?
It is not. The 21-003 seats in a Schlage A85 or H185 knob. A rim device takes a rim cylinder with a tailpiece running through the door into the device chassis. The Corbin Russwin 3070 is a 6-pin rim cylinder housing with a 1-7/8 inch tailpiece, in the 3000 series. Where the trim needs a cylinder face without a keyed function, the BEST 12E series dummy rim cylinder measures 1-5/32 inch in diameter. Tailpiece length is what decides fit on a rim device, so check it against the device before ordering.
13) There is a deadbolt above the knob on the same door. Can one cylinder cover both?
On Schlage hardware, yes in principle: the 21-003 is a 6-pin cylinder for A85 and H185 knobs less orbit, and its stated compatibility covers Schlage locksets and deadbolts on any Schlage keyway, so the knob and the bolt can sit on one key. If the deadbolt is not Schlage, the cylinder has to change. The Kaba Ilco 1549 series is a key-in-deadbolt cylinder, and the 1599 is the matching key-in-knob replacement cylinder, so a non-Schlage opening is covered by two Ilco parts rather than one Schlage part.
14) We want maintenance to rekey in house instead of calling a locksmith. What is the interchangeable core alternative to the 21-003?
The 21-003 is a standard 6-pin key-in-knob cylinder pinned to a Schlage keyway, so rekeying means pinning the cylinder. An interchangeable core system pulls the core with a control key instead. BEST covers that with the 1C series standard 5-pin core from the standard and premium cores line, the Peaks 1CB 150 series interchangeable core cylinder, and the 1CDF drill resistant preferred patented interchangeable core in 7-pin brass, 150 series. For mortise openings running Schlage L9000 locks, the Corbin Russwin 1080 Grade 1 series 1-1/2 inch LFIC mortise cylinder is 6-pin with an A01 Schlage L cam. Moving to cores changes the housing prep, not just the cylinder.
15) The entrance is an aluminum storefront door with an MS deadlock. Does a 21-003 go in that?
No, that opening takes a different family entirely. The 21-003 is a knob cylinder for Schlage A85 and H185 knobs. For Adams Rite MS1847 deadlock and deadlatch systems, the 4024 is a cylinder pull with trim plate mounting and the 4025 is a five pin tumbler cylinder pull with through-screws, the mounting method being the difference between them. Where the deadlock takes a threaded cylinder instead of a pull, the Adams Rite 4036 is a five pin mortise cylinder, 4036 series, Grade 1, with a 1/2 inch minimum door thickness. On a wood door running an Adams Rite 5017 deadlock or deadlatch, the 4026 five pin cylinder pull is the wood door version.
16) The resident doors have Kwikset and Emtek hardware, not commercial knobs. What cylinder covers those?
The 21-003 is a commercial key-in-knob cylinder tied to Schlage A85 and H185 knobs, so residential handlesets and deadbolts need their own retrofit cylinder. Medeco covers that ground: the 1012040 is a 6-pin lazy motion rim cylinder for Kwikset single cylinder deadbolts, the 1065140 is a 5-pin retrofit cylinder for the Arrow JL interconnected lock and for Emtek handleset and deadbolt outside cylinders, the 1065244 is a 5-pin rim lazy motion cylinder supplied with an Emtek tailpiece, and the 1075127 is a 5-pin rim type lazy motion single cylinder for handlesets and deadbolts. Emtek also lists the CY4 cylinder as its own part.
17) Which of the alternate cylinders carry the same pin count as the 21-003, and which do not?
The 21-003 is 6-pin. Also 6-pin are the Detex MC65 mortise cylinder in the Schlage C keyway at 1-1/8 inch, the Corbin Russwin 3070 rim cylinder housing with its 1-7/8 inch tailpiece, the Corbin Russwin 1070 Grade 1 series 1-1/4 inch mortise housing, the Corbin Russwin 1080 LFIC mortise cylinder at 1-1/2 inch, the Falcon A23161-05 G key in lever cylinder, and the Medeco 1012040 rim cylinder. The BEST 1C standard core, the Adams Rite 4036 mortise cylinder, and the Medeco 1065140, 1065244 and 1075127 cylinders are 5-pin, while the BEST 1CDF drill resistant interchangeable core is 7-pin. Pin count has to match the key system the building is already keyed to.
How fast can I get the Schlage 21-003 S123 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 Schlage 21-003 S123 626 come with a warranty?
Absolutely. The Schlage 21-003 S123 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 Schlage 21-003 S123 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 Schlage 21-003 S123 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.
!