Corbin Russwin 121K11-59D1 1-1...
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$63.00
$58.70
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Corbin Russwin 121K11-59D1 1-1/8" Mortise Cylinder Plug with 59D Keyway

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Model: 121K11 59D1 626

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

$63.00
$58.70
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Corbin Russwin 121K11-59D1 1-1/8" Mortise Cylinder Plug with 59D Keyway

The Corbin Russwin 121K11-59D1 is a precision-machined 1-1/8" mortise cylinder plug engineered for commercial-grade lock cylinders. Featuring the 59D keyway, this replacement plug is purpose-built to restore or complete Corbin Russwin mortise cylinder assemblies, ensuring continued reliable performance in demanding door hardware applications.

Key Features

  • Precise 1-1/8" Plug Diameter: Engineered to the exact 1-1/8" mortise cylinder plug dimension for accurate fitment within compatible Corbin Russwin cylinder housings.
  • 59D Keyway: Configured with the proprietary 59D keyway, ensuring proper key engagement and maintained keying integrity within the Corbin Russwin key system.
  • Direct Replacement Part: Designed as a factory-specification replacement component for Corbin Russwin mortise cylinder assemblies, simplifying maintenance and service procedures.
  • Commercial-Grade Construction: Built to Corbin Russwin's commercial quality standards, delivering the durability and dependability required for high-traffic commercial door hardware installations.
  • Corbin Russwin Cylinder Compatibility: Specifically engineered as a Corbin Russwin cylinder part, ensuring seamless integration with compatible mortise cylinder bodies and hardware.

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 59D1
  • Features: Corbin Russwin Cylinder Parts

Typical Applications

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

Why Corbin Russwin 121K11?

Corbin Russwin cylinder components are manufactured to exacting commercial standards, ensuring that replacement parts like the 121K11-59D1 integrate flawlessly with existing hardware. The 59D keyway configuration and precise 1-1/8" plug dimension reflect the tight tolerances that Corbin Russwin is recognized for in commercial door security applications, making this part a dependable choice for facility managers and locksmiths maintaining high-traffic installations.

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 59D1
Features:
Corbin Russwin Cylinder Parts

Corbin Russwin 121K11 59D1 626 – Frequently Asked Questions

1) I need to rekey a Corbin Russwin mortise cylinder. Do I replace the plug or the whole cylinder?
If the shell, cam and housing are sound and you only need to change the plug or its keyway, swapping in the 121K11 plug in the 59D D1 or D2 keyway is the cheaper repair and keeps the existing cylinder body in the door. Replace the whole cylinder when the shell is damaged, when you're moving to a different keyway family, or when you want an interchangeable core setup instead, which is a different architecture, such as a BEST 1C five-pin core or Schlage 20-057 full size interchangeable core.
2) If the whole mortise cylinder needs replacing rather than just the plug, what should be ordered instead of the Corbin Russwin 121K11-59D1?
The Corbin Russwin 121K11-59D1 is a 1-1/8 inch mortise cylinder plug, a replacement component intended to restore an existing Corbin Russwin mortise cylinder assembly. When the complete cylinder body is being swapped out, a full mortise cylinder is the item to order instead: the Detex MC65 is a 1-1/8 inch 6-pin commercial mortise cylinder with a Schlage C keyway, and the Adams Rite 4036 is a Grade 1 five-pin mortise cylinder. Both are complete cylinders, so they come with their own keyway rather than accepting the Corbin Russwin 59D plug.
3) Can a BEST 1C or 1CB interchangeable core be used in place of a Corbin Russwin 121K11 plug?
No. The Corbin Russwin 121K11-59D1 is a plug that seats inside a Corbin Russwin mortise cylinder housing and is machined for the 59D keyway family. The BEST 1C Series standard 5-pin cylinder core and the BEST Peaks 1CB 150 Series interchangeable core are removable cores designed for BEST interchangeable-core housings, not plugs for a conventional Corbin Russwin mortise cylinder. A BEST 1CDF drill-resistant 7-pin core is likewise an interchangeable core for the 150 Series. Choose the 121K11 plug for Corbin Russwin conventional cylinders and the BEST cores only where an IC housing is already in the door.
4) What finishes does the 121K11 mortise cylinder plug come in?
606 satin brass and 626 satin chrome. Both are offered with either the D1 or D2 keyway, so you can match the plug face to the surrounding trim while keeping the building's keyway.
5) Does the 121K11 plug come with keys or pins?
What you're ordering is the plug itself, in your choice of 606 satin brass or 626 satin chrome and D1 or D2 keyway. It is a replacement component for an existing cylinder assembly, so plan on supplying your own pinning and cut keys from your key system. Cylinders sold with keys are separate items, for example the Falcon A23161-05 G key-in-lever cylinder, which is listed keyed different with two cut keys.
6) What is the equivalent part for a rim device rather than a mortise cylinder?
The Corbin Russwin 121K11-59D1 is a mortise cylinder plug. Rim exit devices take a rim cylinder instead: the Schlage 20-021 is a 6-pin rim cylinder with a vertical tailpiece cam and the 20-022 is the same 6-pin rim cylinder with a horizontal tailpiece cam, each supplied with two keys. Where a full size interchangeable core is specified for the rim application, the Schlage 20-057 is a 6-pin FSIC rim cylinder with a convertible tailpiece cam.
7) What should be used for a key-in-lever or key-in-knob lock instead of a mortise cylinder plug?
A key-in-lever or key-in-knob lock takes a knob/lever cylinder, not the 1-1/8 inch Corbin Russwin 121K11-59D1 mortise cylinder plug. The Kaba Ilco 1539 Series is a universal key-in-knob and lever cylinder, the 1579 is a knob and lever cylinder for Sargent locks, and the 1599 is a key-in-knob replacement cylinder. For a key-in-lever on Falcon hardware, the Falcon A23161-05 G is a 6-pin G keyway key-in-lever cylinder supplied keyed different with two cut keys.
8) Is a cylinder pull like the Adams Rite 4024 or 4025 an alternative to the Corbin Russwin 121K11-59D1?
No, they serve different roles. The Corbin Russwin 121K11-59D1 is a keyed plug that goes inside a mortise cylinder body. The Adams Rite 4024 is a cylinder pull with trim plate mounting and the 4025 is a five-pin tumbler cylinder pull with through-screws, both intended for use with the Adams Rite MS1847 deadlock/deadlatch; the 4026 is a five-pin cylinder pull for the 5017 wood door deadlock/deadlatch. Those are door-face pull assemblies for narrow stile and wood door deadlocks, so they replace a pull rather than the plug in a Corbin Russwin cylinder.
9) For a deadbolt that needs a keyed cylinder, is the Corbin Russwin 121K11-59D1 the right part?
The 121K11-59D1 is a mortise cylinder plug for Corbin Russwin mortise cylinder assemblies in commercial door hardware, not a deadbolt cylinder. For deadbolt applications, the Kaba Ilco 1549 Series is a key-in-deadbolt cylinder, the Medeco 1012040 is a 6-pin lazy motion rim cylinder for Kwikset single cylinder deadbolts, and the Medeco 1075127 is a 5-pin rim type lazy motion single cylinder for handlesets and deadbolts.
10) Is the 121K11 plug suitable for high-traffic commercial doors, or is it a residential part?
Commercial. It's built to Corbin Russwin's commercial cylinder standards and is used in office buildings, schools, healthcare, retail, government facilities, warehouses and multi-tenant residential properties, all high-cycle openings where a rekey or cylinder rebuild is routine maintenance.
11) What is the difference between the Corbin Russwin 121K11-59D1 and a dummy cylinder such as the BEST 12E?
The Corbin Russwin 121K11-59D1 is a working keyed plug with the 59D keyway, supplied in 606 satin brass or 626 satin chrome and in D1 or D2 keyway variations. The BEST 12E Series dummy rim cylinder has a 1-5/32 inch diameter and is a non-keyed filler used where the opening needs the appearance of a cylinder without key operation. Order the 121K11 plug when the cylinder must be keyed into the Corbin Russwin system.
12) Is the Emtek CY4 cylinder a substitute for the Corbin Russwin 121K11-59D1?
No. The Emtek CY4 is a cylinder sold individually as an Emtek part for Emtek hardware, and Medeco retrofit cylinders such as the 1065140 for Arrow JL interconnected locks and Emtek handlesets and deadbolts, or the 1065244 rim lazy motion cylinder with Emtek tailpiece, are also built around residential-style handleset hardware. The Corbin Russwin 121K11-59D1 is a commercial mortise cylinder plug machined for Corbin Russwin cylinder housings and the 59D keyway family, so it is the part to use on Corbin Russwin commercial openings.
How fast can I get the Corbin Russwin 121K11 59D1 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 59D1 626 come with a warranty?
Absolutely. The Corbin Russwin 121K11 59D1 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 59D1 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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