Corbin Russwin 121K11 L1 1-1/8...
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$63.00
$58.70
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Corbin Russwin 121K11 L1 1-1/8" Mortise Cylinder Plug with L Keyway

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Model: 121K11 L1 626

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

$63.00
$58.70
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Corbin Russwin 121K11 L1 1-1/8" Mortise Cylinder Plug with L Keyway

The Corbin Russwin 121K11 L1 is a 1-1/8" mortise cylinder plug featuring the L keyway, designed as a precision replacement part for compatible Corbin Russwin mortise cylinder assemblies. Built for commercial door hardware applications, this cylinder plug delivers the exacting dimensional tolerances and keyway specifications required for reliable key control and lock performance in demanding environments. As a genuine Corbin Russwin cylinder component, it is engineered to integrate seamlessly with existing Corbin Russwin cylinder hardware.

Key Features

  • Precise 1-1/8" Plug Diameter: Sized at 1-1/8" to fit compatible Corbin Russwin mortise cylinder housings, ensuring proper fit and function.
  • L Keyway Configuration: Features the L keyway profile for defined key control compatibility within the Corbin Russwin keying system.
  • Genuine Corbin Russwin Cylinder Part: Manufactured as an authentic Corbin Russwin cylinder component, maintaining OEM performance standards for replacement applications.
  • Commercial-Grade Construction: Engineered to meet the performance demands of commercial door hardware installations where durability and security are essential.
  • Mortise Cylinder Compatibility: Designed for use with mortise cylinder assemblies, making it suitable for a wide range of commercial mortise lock applications.
  • Direct Replacement Part: Serves as a purpose-built replacement component, supporting maintenance and restoration of existing Corbin Russwin cylinder hardware without full cylinder replacement.

Technical Specifications

  • Department: Door Hardware
  • Product Category: Mechanical Locks
  • Product Group: Parts and Accessories
  • Subcategory: Parts and Accessories
  • Product Subgroup: Parts and Accessories
  • Product Type: Cylinders
  • Parts and Accessories Type: Replacement Parts
  • Commercial/Residential: Commercial
  • Product Model: 121K11 L1
  • Features: Corbin Russwin Cylinder Parts

Typical Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Government and Municipal Buildings
  • Retail Establishments
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties

Why Corbin Russwin 121K11?

Corbin Russwin cylinder parts are engineered to uphold the performance and security standards that commercial facilities depend on. The 121K11 L1 mortise cylinder plug delivers precise dimensional compliance and authentic keyway geometry, ensuring that lock assemblies maintain their intended functionality after service or maintenance. For facilities that rely on Corbin Russwin keying systems, genuine replacement components like this plug preserve the integrity of the overall security infrastructure.

Manufacturer Resources

Product Specs

Department:
Door Hardware
Product Category:
Mechanical Locks
Product Group:
Parts and Accessories
Subcategory:
Parts and Accessories
Product Subgroup:
Parts and Accessories
Product Type:
Cylinders
Parts and Accessories Type:
Replacement Parts
Commercial/Residential:
Commercial
Product Model:
121K11 L1
Features:
Corbin Russwin Cylinder Parts

Corbin Russwin 121K11 L1 626 – Frequently Asked Questions

1) Is the Corbin Russwin 121K11 a complete mortise cylinder or just the plug?
It is the plug only. The 121K11 is a 1-1/8 inch mortise cylinder plug meant to be installed into a compatible Corbin Russwin mortise cylinder housing, so you can restore a cylinder without replacing the whole assembly. If you need a full cylinder rather than a component, look at a complete mortise cylinder such as the Detex MC65, a 1-1/8 inch 6-pin commercial mortise cylinder, or the Adams Rite 4036 mortise cylinder.
2) The lock is a key-in-lever, not a mortise lock - is the 121K11 the right cylinder part?
No. The 121K11 L1 plug is sized and shaped for mortise cylinder assemblies. Key-in-knob and key-in-lever locks take a different cylinder body: the Kaba Ilco 1539 is a universal key-in-knob/lever cylinder, the Kaba Ilco 1599 is a key-in-knob replacement cylinder, the Kaba Ilco 1579 is a knob and lever cylinder for Sargent, and the Falcon A23161-05 G is a 6-pin key-in-lever cylinder in the G keyway supplied keyed different with two cut keys. Match the cylinder style to the lock chassis before ordering.
3) If the whole mortise cylinder needs replacing instead of just the plug, what complete 1-1/8 inch mortise cylinder can be used?
The Corbin Russwin 121K11 L1 is a 1-1/8 inch mortise cylinder plug - the keyed core component, not a complete cylinder. When the housing itself is worn or the opening is not on a Corbin Russwin keying system, a complete mortise cylinder is the direction to go: the Detex MC65 is a 1-1/8 inch 6-pin mortise cylinder cut to the Schlage C keyway, and the Adams Rite 4036 is a Grade 1 five-pin mortise cylinder. Note that moving to either one changes the keyway away from the Corbin Russwin L family, so existing L1, L2 or L3 keys will not operate it.
4) Is a rim cylinder like the Schlage 20-021 a substitute for the Corbin Russwin 121K11 plug?
No. The 121K11 L1 is a mortise cylinder plug intended for Corbin Russwin mortise cylinder assemblies, which thread into a mortise lock body. The Schlage 20-021 and 20-022 are rim cylinders, which mount through the door behind a rim exit device and drive it with a tailpiece - the 20-021 uses a vertical tailpiece cam and the 20-022 a horizontal one. The two mount in entirely different preps and are not interchangeable.
5) Is the Corbin Russwin 121K11 plug an interchangeable core?
No. It is a conventional mortise cylinder plug that a locksmith pins and installs into the cylinder body. If your facility is standardized on interchangeable cores instead, the BEST 1C 5-pin standard core, the 1CB 150 Series core, or the drill resistant 1CDF 7-pin core are IC products; Schlage's 20-057-C is a full size interchangeable core in the C keyway.
6) What finishes does the 121K11 cylinder plug come in?
Two: 606 satin brass and 626 satin chrome. Since the plug face is the part visible at the key, match it to the trim and the rest of the cylinder, 626 with satin chrome/brushed nickel hardware and 606 with satin brass. Both finishes are available in all three keyways, L1, L2 and L3.
7) I manage a building keyed on Corbin Russwin. Can I rekey doors with this instead of buying new cylinders?
That is what the part is for. Swapping plugs lets a locksmith rekey or re-profile a Corbin Russwin mortise cylinder while keeping the existing housing and cam, which keeps the rest of the security system intact across an office, school, healthcare or multi-tenant property. Ordering it does assume a locksmith to pin and install it; it ships as a component, not a keyed cylinder.
8) I need a rim cylinder, not a mortise plug. What should I order instead?
The 121K11 is a mortise cylinder plug and will not work in a rim application. For rim cylinders, the Schlage 20-021 is a 6-pin rim cylinder with a vertical tailpiece cam and the 20-022 is the same with a horizontal cam; the Schlage 20-057 is a 6-pin full size interchangeable core rim cylinder with a convertible tailpiece cam.
9) We want to stop rekeying cylinders one at a time - what is the alternative to plugs like the Corbin Russwin 121K11?
Replacing the plug in a Corbin Russwin mortise cylinder means the cylinder comes apart at the bench each time keying changes. An interchangeable core system moves that work to a key turn instead: the BEST 1CB is a 150 Series interchangeable core cylinder, the BEST 1CDF is a drill-resistant patented 7-pin brass interchangeable core in the 150 Series, and the Schlage 20-057 is a 6-pin full size interchangeable core rim cylinder with a convertible tailpiece cam. Converting a facility to cores is a change of keying platform, so it is planned across a door group rather than done one opening at a time.
10) What should I use on an aluminum storefront door instead of a Corbin Russwin 121K11 plug?
The 121K11 L1 is a repair part for Corbin Russwin mortise cylinder assemblies in commercial mortise locks. Narrow-stile aluminum storefront openings are usually served by Adams Rite hardware instead: the Adams Rite 4024 is a cylinder pull with trim plate mounting for MS1847 deadlock systems, the 4025 is a five-pin cylinder pull with through-screws for the same MS1847 deadlock, and the 4026 is a five-pin cylinder pull for the 5017 wood door deadlock/deadlatch. Choose by the deadlock already in the door.
11) Can the Corbin Russwin 121K11 plug be used in a residential deadbolt or handleset?
The 121K11 L1 is a commercial part built for Corbin Russwin mortise cylinder assemblies, not for residential deadbolt or handleset bodies. Those take purpose-built retrofit cylinders: the Medeco 1012040 is a 6-pin lazy motion rim cylinder for Kwikset single cylinder deadbolts, the Medeco 1065140 is a 5-pin retrofit for Arrow JL interconnected locks and Emtek handleset and deadbolt outside cylinders, the Medeco 1065244 is a 5-pin lazy motion rim cylinder with an Emtek tailpiece, and the Medeco 1075127 is a 5-pin rim type lazy motion single cylinder for handlesets and deadbolts.
12) Does the 121K11 plug come keyed with cut keys?
It is supplied as a cylinder component in the keyway you select, L1, L2 or L3. If what you actually need is a cylinder that arrives pinned with keys in hand, the Schlage 20-021 and 20-022 rim cylinders ship with two keys and the Falcon A23161-05 G comes keyed different with two cut keys.
13) What is the difference between the Corbin Russwin 121K11 plug and a dummy cylinder?
The 121K11 L1 is a functioning keyed plug with an L keyway, carrying the pin chambers that operate the lock. A dummy cylinder has no keying function at all - the BEST 12E Series dummy rim cylinder, at 1-5/32 inch diameter, fills a cylinder hole for appearance or to blank off an unused prep. Use the 121K11 where the opening must be keyed, and a dummy only where it must not.
14) If I only need to change the keying and not the housing, is a core a simpler option than the 121K11 plug?
On a Corbin Russwin mortise cylinder the 121K11 L1 plug is the part that carries the keying, and swapping it keeps the existing housing and the L keyway family. If the hardware is already on a BEST core platform, the simpler route is a core swap - the BEST 1C5 is a standard 5-pin cylinder core. The two are not interchangeable with each other; the deciding factor is which cylinder body is in the door.
How fast can I get the Corbin Russwin 121K11 L1 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 Corbin Russwin 121K11 L1 626 come with a warranty?
Absolutely. The Corbin Russwin 121K11 L1 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 Corbin Russwin 121K11 L1 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
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