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 59C Keyway

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Model: 121K11 59C1 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 59C Keyway

The Corbin Russwin 121K11 59C1 is a 1-1/8" mortise cylinder plug designed for use with the 59C keyway, delivering precise, manufacturer-matched compatibility for commercial door hardware applications. This replacement cylinder plug is engineered to Corbin Russwin's exacting standards, making it an ideal component for maintaining or restoring the performance of existing Corbin Russwin mortise cylinder assemblies. Suited for commercial environments, this part ensures a reliable, secure fit within compatible mortise cylinder housings.

Key Features

  • Precise Cylinder Plug Dimensions: Measures 1-1/8" to ensure accurate, secure fitment within compatible Corbin Russwin mortise cylinder housings.
  • 59C Keyway Compatibility: Features the 59C keyway profile for seamless integration with existing Corbin Russwin keying systems and key blanks.
  • Genuine Corbin Russwin Component: Manufactured as an authentic Corbin Russwin cylinder part, ensuring OEM-level quality and fit for replacement applications.
  • Commercial-Grade Construction: Engineered to meet the performance demands of commercial door hardware installations where reliability and longevity are essential.
  • Mortise Cylinder Application: Designed specifically for mortise cylinder assemblies, providing a drop-in replacement solution for field servicing and maintenance.
  • Replacement Part Convenience: Simplifies on-site cylinder service by providing a factory-matched plug without the need to replace the entire cylinder assembly.

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 59C1
  • Features: Corbin Russwin Cylinder Parts

Typical Applications

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

Why Corbin Russwin 121K11?

Corbin Russwin cylinder parts are built to the same exacting standards as the original assemblies they service, ensuring that replacement components perform identically to factory-installed hardware. The 121K11 59C1 mortise cylinder plug provides facilities managers and locksmiths with a reliable, OEM-quality solution for maintaining Corbin Russwin mortise cylinder systems in demanding commercial environments. When consistent performance and precise keyway compatibility matter, Corbin Russwin replacement parts deliver the professional-grade reliability required.

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 59C1
Features:
Corbin Russwin Cylinder Parts

Corbin Russwin 121K11 59C1 626 – Frequently Asked Questions

1) Is the Corbin Russwin 121K11 a complete mortise cylinder or just the plug?
It's the plug only. The 121K11 is a 1-1/8 inch mortise cylinder plug meant to drop into an existing Corbin Russwin mortise cylinder housing, so a locksmith can re-plug or re-keyway a cylinder in the field instead of swapping the whole assembly. If you need a complete mortise cylinder, look at something like the Detex MC65, a 1-1/8 inch 6-pin mortise cylinder sold as a full unit.
2) What's the difference between the C1 and C2 keyway options on the Corbin Russwin 121K11?
Both are 59C keyway family plugs; C1 and C2 are the two keyway choices you pick at order. They are different key sections, so a key cut on one will not operate the other. Order the section that matches the keying system already running the building, otherwise the plug will not accept your existing keys.
3) Instead of replacing just the plug, what full 1-1/8 inch mortise cylinder can I install?
The Corbin Russwin 121K11 is a 1-1/8 in. mortise cylinder plug intended to service an existing Corbin Russwin mortise cylinder housing rather than replace it. If you would rather swap the whole cylinder, the Detex MC65 is a 1-1/8 in. 6-pin commercial mortise cylinder in the Schlage C keyway. Note the keying difference: the 121K11 plug carries the Corbin Russwin 59C keyway and drops into a Corbin Russwin system, while the MC65 would key to a Schlage C system instead.
4) What mortise cylinder works in an aluminum storefront door instead of the Corbin Russwin 121K11?
For narrow stile aluminum storefront, the Adams Rite 4036 is a Grade 1 five-pin mortise cylinder rated to a 1/2 in. minimum door thickness, which suits the thin stiles storefront hardware sits in. Adams Rite also offers cylinder pulls: the 4024 with trim plate mounting and the 4025 five-pin with through-screws, both for MS1847 deadlock and deadlatch systems, and the 4026 five-pin pull for the 5017 wood door deadlock. The Corbin Russwin 121K11 is a plug for an existing Corbin Russwin mortise cylinder in the 59C keyway and is not a storefront pull.
5) Can I use this Corbin Russwin plug to convert a cylinder to a different keyway?
Yes, that's the usual reason to buy one. Swapping in a 59C plug in the C1 or C2 section changes what key section the cylinder accepts, which is how you bring an existing Corbin Russwin mortise cylinder onto a building masterkey system without buying new cylinders. You'll still need to pin it to your system.
6) If I'm standardizing a facility on interchangeable cores instead, what should I look at instead of this plug?
This plug serves conventional Corbin Russwin mortise cylinders, so it keeps you on a fixed-keyway system. If the goal is field-rekeyable cores across a facility, an interchangeable core line is the different direction: BEST 1C Series standard 5-pin cores, or the 1CB Series 150 interchangeable core, for example. That's a system change, not a swap you make one door at a time.
7) Can I use a Schlage 20-021 rim cylinder in place of the Corbin Russwin 121K11?
No. The Schlage 20-021 is a rim cylinder with a vertical tailpiece cam, which mounts through the door behind a rim exit device, while the Corbin Russwin 121K11 is a mortise cylinder plug that goes inside a threaded mortise cylinder shell. Schlage also offers the 20-022 with a horizontal tailpiece cam. Neither is a mortise part and neither fits where the 121K11 plug goes.
8) We want to move to interchangeable core instead of rekeying plugs - what should we look at?
The Corbin Russwin 121K11 plug is a conventional-cylinder service part: you pull the plug and repin it to the 59C keyway. If you would rather standardize a facility on cores that pull with a control key, BEST offers the 1C Series standard 5-pin cylinder core and the 1CB 150 Series interchangeable core, with the 1CDF adding drill-resistant patented 7-pin construction in brass. Schlage's 20-057 is a 6-pin full size interchangeable core rim cylinder with a convertible tailpiece cam. Moving to any of these means changing the cylinder housings, not just the plug.
9) The lock on my door is a key-in-lever, not a mortise lock - is the 121K11 the right cylinder part?
No. The Corbin Russwin 121K11 is a mortise cylinder plug for mortise cylinder assemblies. For key-in-knob and key-in-lever bodies, Kaba Ilco makes the 1539 Series universal key-in-knob/lever cylinder and the 1599 key-in-knob replacement cylinder, with the 1579 built for Sargent knobs and levers. Falcon's A23161-05 G is a key-in-lever cylinder in the RU/T 6-pin G keyway supplied keyed different with two cut keys.
10) Is the 121K11 plug suitable for a commercial building, or is it a residential part?
Commercial. It's classed as a commercial mortise cylinder part and is used for servicing Corbin Russwin cylinders in offices, schools, healthcare, government buildings and multi-tenant residential. For a light residential key-in-knob or deadbolt cylinder you'd be looking at something else entirely, like a Kaba Ilco 1599 key-in-knob replacement cylinder.
11) I need a cylinder for a deadbolt or handleset, not a mortise lock - what are the options?
The Corbin Russwin 121K11 is a mortise cylinder plug in the 59C keyway, sold in 606 satin brass and 626 satin chrome. For deadbolts and handlesets, Medeco offers the 1012040 6-pin lazy motion rim cylinder for Kwikset single cylinder deadbolts, the 1065140 5-pin retrofit cylinder for the Arrow JL interconnected lock and Emtek handleset and deadbolt outside cylinder, the 1065244 5-pin rim lazy motion cylinder with an Emtek tailpiece, and the 1075127 5-pin rim type lazy motion single cylinder for handlesets and deadbolts. Kaba Ilco's 1549 is a key-in-deadbolt cylinder.
12) Is there a non-keyed cylinder option if the opening does not need to lock?
The Corbin Russwin 121K11 is a keyed plug carrying the 59C keyway for an existing Corbin Russwin keying system. If an opening needs a cylinder body for appearance or trim fill without key function, the BEST 12E Series dummy rim cylinder has a 1-5/32 in. diameter. That is a rim format dummy, so it will not seat in a mortise cylinder shell the way the 121K11 plug does.
How fast can I get the Corbin Russwin 121K11 59C1 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 59C1 626 come with a warranty?
Absolutely. The Corbin Russwin 121K11 59C1 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 59C1 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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