Corbin Russwin 121K11 1-1/8 in...
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$63.00
$58.70
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Corbin Russwin 121K11 1-1/8 in. Mortise Cylinder Plug with 59A Keyway

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Model: 121K11 59A1 626

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

$63.00
$58.70
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Corbin Russwin 121K11 1-1/8 in. Mortise Cylinder Plug with 59A Keyway

The Corbin Russwin 121K11 is a 1-1/8" mortise cylinder plug featuring the 59A keyway, engineered as a precision replacement part for compatible Corbin Russwin mortise cylinder assemblies. Designed for commercial-grade mechanical lock applications, this cylinder plug provides a direct-fit solution for maintaining or restoring proper cylinder function. Its 1-1/8" plug dimension ensures compatibility with standard mortise cylinder housings requiring the 59A keyway specification.

Key Features

  • Precise 1-1/8" Plug Dimension: The 1-1/8" mortise cylinder plug size provides accurate fitment for compatible Corbin Russwin mortise cylinder housings.
  • 59A Keyway Specification: Features the 59A keyway profile, ensuring proper key fit and compatibility within Corbin Russwin keying systems.
  • Commercial-Grade Construction: Manufactured to Corbin Russwin's commercial standards, delivering reliable performance in demanding door hardware applications.
  • Direct Replacement Part: Designed as an OEM-compatible replacement component for Corbin Russwin mortise cylinder assemblies, simplifying maintenance and service.
  • Mortise Cylinder Application: Specifically suited for mortise-type cylinder configurations common in commercial mechanical lock installations.

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 59A1
  • 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 manufactured to exacting commercial standards, ensuring reliable fitment and consistent performance in professional door hardware applications. The 121K11 mortise cylinder plug reflects Corbin Russwin's commitment to precision engineering, providing security professionals and facility maintenance teams with a dependable OEM-compatible replacement solution for mortise lock systems.

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 59A1
Features:
Corbin Russwin Cylinder Parts

Corbin Russwin 121K11 59A1 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 with the 59A keyway, sold as a replacement component that goes into a compatible Corbin Russwin mortise cylinder housing. If you need a whole cylinder to drop into a lock body, this is not it - order a complete mortise cylinder instead.
2) What is the difference between the A1 and A2 keyway options on the Corbin Russwin 121K11 plug?
A1 and A2 are the two keyway choices offered on this 59A-family plug. They are different key sections within the Corbin Russwin system, so a key cut on one will not enter the other. Match the plug to the keyway already in use on the building's other cylinders, or your masterkey system will not carry over.
3) Will the 121K11 plug fit any mortise cylinder housing?
No. It is sized at 1-1/8 inches for Corbin Russwin mortise cylinder housings built for the 59A keyway. It is not a universal part and will not serve as a plug for another manufacturer's mortise cylinder. If you are rekeying a non-Corbin housing, replace the whole cylinder with one matching that brand's system.
4) If I need a complete 1-1/8 in. mortise cylinder rather than just the plug, what should I order?
The Corbin Russwin 121K11 is a 1-1/8 in. mortise cylinder plug - a replacement component for an existing Corbin Russwin mortise cylinder housing, not a whole cylinder. If the housing is damaged or missing, a complete mortise cylinder is the right item: the Detex MC65 is a 1-1/8 in. 6-pin mortise cylinder cut to the Schlage C keyway, and the Adams Rite 4036 is a five-pin mortise cylinder in the 4036 Series. Note that both of those are supplied on their own keyways, so they will not key into a Corbin Russwin 59A system the way the 121K11 plug does.
5) Is a BEST interchangeable core an equivalent replacement for the Corbin Russwin 121K11 plug?
No. The 121K11 is a mortise cylinder plug carrying the Corbin Russwin 59A keyway and is fitted into a compatible Corbin Russwin mortise cylinder housing. BEST interchangeable cores such as the 1C Series standard 5-pin core, the Peaks 1CB 150 Series core, or the 7-pin 1CDF drill-resistant core are figure-eight cores that drop into BEST interchangeable-core housings. They serve the same maintenance purpose - restoring key control without replacing the lock - but they are a different cylinder platform and a different keyway, so they are not interchangeable with the 121K11.
6) My exit device takes a rim cylinder, not a mortise cylinder - what do I use instead of the 121K11?
The 121K11 is a mortise cylinder plug and will not serve a rim application. For rim-prepped exit devices, look at the Schlage Commercial 20-021 6-pin rim cylinder with vertical tailpiece cam or the 20-022 with horizontal tailpiece cam, matched to the cam orientation your device requires. If the facility runs full-size interchangeable cores, the Schlage 20-057 is a 6-pin FSIC rim cylinder with a convertible tailpiece cam.
7) I need a 1-1/8 inch mortise cylinder for a Schlage-keyed building, not a Corbin plug. What should I look at?
The Detex MC65 is a 1-1/8 inch six-pin commercial mortise cylinder cut to the Schlage C keyway, which is the usual choice when the rest of the building is keyed Schlage C. The Corbin Russwin 121K11 plug only works inside a Corbin 59A housing and cannot be keyed to a Schlage section.
8) Can I use the 121K11 to convert a Corbin Russwin mortise lock to an interchangeable core?
No. The 121K11 is a conventional mortise cylinder plug, not an IC housing or core. Converting an opening to interchangeable core means changing the cylinder itself - a full-size IC cylinder such as the Schlage 20-057 FSIC rim cylinder, or a BEST 1C series small-format core, depending on the format your facility standardizes on.
9) Is the 121K11 the right part for a residential deadbolt or handleset?
It is not the usual fit. The Corbin Russwin 121K11 is a commercial mortise cylinder plug intended for commercial mechanical lock applications. Residential deadbolts and handlesets generally take a rim-type lazy motion cylinder: the Medeco 1012040 is a 6-pin lazy motion rim cylinder for Kwikset single cylinder deadbolts, the 1075127 is a 5-pin rim type lazy motion single cylinder for handlesets and deadbolts, and the 1065244 is a 5-pin rim lazy motion cylinder supplied with an Emtek tailpiece. The Medeco 1065140 is a 5-pin retrofit cylinder for the Arrow JL interconnected lock and Emtek handleset and deadbolt outside cylinder, and the Emtek CY4 is sold as a single cylinder part.
10) I need to rekey a key-in-lever or key-in-knob lock, not a mortise cylinder. What is the right part?
The Corbin Russwin 121K11 is a mortise cylinder plug and fits mortise cylinder housings only. For key-in-knob and key-in-lever bodies, the Kaba Ilco 1539 Series is a key-in-knob/lever universal cylinder, the 1579 Series is a knob and lever cylinder for Sargent locks, and the 1599 Series is a key-in-knob replacement cylinder. On the manufacturer-original side, the Falcon A23161-05 G is a key-in-lever cylinder for the RU/T series with a 6-pin G keyway, keyed different with two cut keys.
11) What is the difference between the 121K11 plug and a cylinder pull like the Adams Rite 4024?
They do different jobs. The 121K11 is the keyed plug that goes inside a Corbin Russwin mortise cylinder and carries the 59A keyway. A cylinder pull is door trim that houses a cylinder and gives a pull grip: the Adams Rite 4024 mounts with a trim plate and the 4025 uses through-screws, both for the Adams Rite MS1847 deadlock/deadlatch, while the 4026 is the five-pin cylinder pull for wood door applications with the Adams Rite 5017 wood door deadlock/deadlatch. Ordering a pull will not restore a worn mortise cylinder plug.
12) I am standardizing a building on one key system - how does the 121K11 compare with going to full-size interchangeable core?
Standardizing on the Corbin Russwin 121K11 keeps you on the 59A keyway within Corbin Russwin mortise cylinder housings, and rekeying means swapping the plug inside the existing cylinder. An FSIC program instead standardizes on removable cores across the building: the Schlage 20-057-C is a full size interchangeable core cylinder on the C keyway in 643E Aged Bronze, and the Schlage 20-057 is the 6-pin FSIC rim cylinder with a convertible tailpiece cam. The tradeoff is that FSIC requires the housings to be FSIC-prepped, while the 121K11 works with the Corbin Russwin mortise cylinders already in the doors.
13) Does the Corbin Russwin 121K11 come with keys or pins?
The 121K11 is the plug itself, specified by its 1-1/8 inch size, 59A keyway and A1 or A2 key section. Plan on supplying your own pinning and cutting keys to your system, the way you would with any plug ordered for a rekey.
14) I need a non-keyed cylinder for a pair of doors where only one leaf locks - does the 121K11 cover that?
No. The 121K11 is a keyed mortise cylinder plug supplied on the 59A keyway in A1 and A2 variations, so it is a working cylinder component. For an inactive leaf or a trim position that only needs to fill the cylinder hole, the BEST 12E Series dummy rim cylinder with a 1-5/32 in. diameter is the dummy option, though it is a rim-format part rather than a mortise plug.
15) My deadbolt cylinder is shot - can I use the 121K11, or is there a dedicated deadbolt cylinder?
The 121K11 is a mortise cylinder plug, so it applies only where a Corbin Russwin mortise cylinder housing is present. For deadbolt-function cylinders, the Kaba Ilco 1549 Series is a key-in-deadbolt cylinder, and the 1539 and 1599 Series are also listed for deadbolt function. Confirm which body your deadbolt uses before ordering, since these are not mortise-format parts.
How fast can I get the Corbin Russwin 121K11 59A1 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 Corbin Russwin 121K11 59A1 626 come with a warranty?
Absolutely. The Corbin Russwin 121K11 59A1 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 59A1 626?
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