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 D Keyway

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Model: 121K11 D1 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 D Keyway

The Corbin Russwin 121K11 D1 is a 1-1/8" mortise cylinder plug featuring the D keyway, engineered as a precision replacement component for compatible Corbin Russwin mortise cylinder assemblies. Designed for commercial door hardware applications, this cylinder plug delivers consistent, reliable key operation in high-demand environments where quality replacement parts are essential for maintaining security integrity.

Key Features

  • Precise 1-1/8" Plug Diameter: Manufactured to a 1-1/8" specification for accurate fitment within compatible Corbin Russwin mortise cylinder housings.
  • D Keyway Configuration: Features the Corbin Russwin D keyway profile, ensuring proper key engagement and security compatibility with existing D keyway key systems.
  • Commercial-Grade Construction: Built to Corbin Russwin's commercial quality standards, making it suitable for demanding institutional and commercial door hardware installations.
  • Genuine Corbin Russwin Cylinder Part: Sourced as an authentic Corbin Russwin cylinder component, ensuring dimensional accuracy and performance consistency with original equipment.
  • Direct Replacement Compatibility: Designed as a replacement part for Corbin Russwin mortise cylinder assemblies, simplifying maintenance and service of existing 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 D1
  • Features: Corbin Russwin Cylinder Parts

Typical Applications

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

Why Corbin Russwin 121K11?

Corbin Russwin cylinder components are manufactured to exacting commercial-grade standards, ensuring that replacement parts like the 121K11 D1 maintain the same dimensional accuracy and key control performance as original factory-installed hardware. Engineered for the demands of professional door hardware service and maintenance, this cylinder plug supports the long-term security and reliability of Corbin Russwin mortise lock 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 D1
Features:
Corbin Russwin Cylinder Parts

Corbin Russwin 121K11 D1 626 – Frequently Asked Questions

1) What exactly is the Corbin Russwin 121K11 D1, a whole mortise cylinder or just the plug?
It is the plug only, not a complete cylinder. The 121K11 is a 1-1/8 inch mortise cylinder plug with the Corbin Russwin D keyway, sold as a replacement component that drops into a compatible Corbin Russwin mortise cylinder housing. If you need a full cylinder body with shell, cam and pins, this part alone will not get you there.
2) Which Corbin Russwin D keyways can I order this cylinder plug in?
Four D-family keyways are offered: D1, D2, D3 and D4. The keyway has to match the key system already in the building, so pull a key or the existing cylinder stamp before you order. Getting it wrong means the plug drops in fine mechanically but your existing keys will not enter it.
3) Can I use a Corbin Russwin 121K11 plug to convert a Schlage or BEST cylinder to a D keyway?
No. The 121K11 is a 1-1/8 inch plug machined for Corbin Russwin mortise cylinder housings and the D keyway profile. It will not serve as a plug in another manufacturer's cylinder. If you are working on Schlage hardware, the Schlage 20-021 and 20-022 rim cylinders (vertical and horizontal tailpiece cams) are complete Schlage cylinders, and for interchangeable core systems the BEST 1C 5-pin core or Schlage 20-057 FSIC core is the right direction.
4) I need a complete 1-1/8 inch mortise cylinder, not just the plug. What should I order instead of the Corbin Russwin 121K11?
The Corbin Russwin 121K11 D1 is a cylinder plug only - the keyed plug that drops into an existing Corbin Russwin mortise cylinder housing. If you need a whole mortise cylinder, the Detex MC65 is a 1-1/8 inch 6-pin commercial mortise cylinder in the Schlage C keyway, and the Adams Rite 4036 is a Grade 1 five-pin mortise cylinder. Both are complete assemblies, so they will not key into an existing Corbin Russwin D keyway system the way the 121K11 plug does.
5) Can I use a BEST interchangeable core instead of replacing the plug in my Corbin Russwin mortise cylinder?
No. The Corbin Russwin 121K11 is a replacement plug for a fixed Corbin Russwin mortise cylinder, offered in D1, D2, D3 and D4 keyways. BEST interchangeable core products such as the 1C Series standard 5-pin core and the 1CB 150 Series core are figure-eight cores that require a housing built to accept an interchangeable core; they do not fit a conventional mortise cylinder shell. Going that route means changing the cylinder housing, not just the plug.
6) My opening uses a rim exit device, not a mortise lock. Is the 121K11 the right cylinder part?
No. The Corbin Russwin 121K11 plug serves mortise cylinder assemblies. For a rim exit device you want a rim cylinder: the Schlage 20-021 is a 6-pin rim cylinder with a vertical tailpiece cam and the 20-022 is the same cylinder with a horizontal tailpiece cam, with the cam orientation chosen to match the device. The Schlage 20-057 is a 6-pin FSIC rim cylinder with a convertible tailpiece cam if the building runs full size interchangeable cores.
7) Does the 121K11 plug come in a finish that matches my existing Corbin Russwin cylinders?
Two finishes: 606 satin brass and 626 satin chrome. 626 is the usual commercial standard and is what most Corbin Russwin mortise hardware in offices, schools and healthcare buildings is specified in. Note the finish and keyway pairings differ, so confirm the combination you need is one that exists.
8) Will the 121K11 plug come pinned and keyed, or do I have to key it myself?
Treat it as a bare plug for a locksmith to pin and key to your system. It is specified by diameter (1-1/8 inch), keyway (D1 through D4) and finish only, so plan on supplying your own pins and cutting keys on the correct D keyway blank. If you want a cylinder that arrives keyed with cut keys, look at a complete cylinder such as the Falcon A23161-05 G, which ships keyed different with two cut keys.
9) What do I use if the cylinder I am servicing is in a key-in-lever or key-in-knob lock rather than a mortise lock?
The Corbin Russwin 121K11 plug is for mortise cylinder assemblies only. Key-in-knob and key-in-lever locks take a different cylinder body: the Kaba Ilco 1539 Series is a universal key-in-knob and lever cylinder, the 1579 Series is a knob and lever cylinder made for Sargent locks, and the 1599 is a key-in-knob replacement cylinder. The Falcon A23161-05 G is a key-in-lever cylinder with a 6-pin G keyway supplied keyed different with two cut keys.
10) Is an Adams Rite cylinder pull an alternative to the Corbin Russwin 121K11 plug?
They solve different problems. The 121K11 is the keyed plug inside a Corbin Russwin mortise cylinder. The Adams Rite 4024 is a cylinder pull with trim plate mounting and the 4025 is a five-pin cylinder pull with through-screws, both intended for Adams Rite MS1847 deadlock and deadlatch systems; the 4026 five-pin cylinder pull is for the 5017 wood door deadlock. Those are pull-and-cylinder units for narrow stile and wood door deadlocks, not a service part for a mortise cylinder.
11) I am rekeying deadbolts and handlesets in a residential building - does the 121K11 apply?
The 121K11 is a commercial mortise cylinder plug and applies to Corbin Russwin mortise hardware. For deadbolt and handleset retrofits, the Medeco 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 Emtek handleset and deadbolt outside cylinder, and the 1075127 is a 5-pin rim type lazy motion single cylinder for handlesets and deadbolts. The Kaba Ilco 1549 Series is a key-in-deadbolt cylinder.
12) The door needs a cylinder that looks right but does not operate anything. Is a keyed plug like the 121K11 the wrong call?
Yes, if nothing needs to turn. The Corbin Russwin 121K11 is a keyed, pinned plug for working Corbin Russwin mortise cylinders. For an opening that only needs the appearance of a cylinder, the BEST 12E Series dummy rim cylinder with a 1-5/32 inch diameter serves that purpose. Note it is a rim format, so it suits a rim prep rather than a mortise cylinder threaded hole.
13) If the whole Corbin Russwin mortise cylinder is drilled or damaged, what higher-security option can go in instead of a new plug?
A plug like the 121K11 D1 only restores a housing that is still sound. If the cylinder body itself is compromised, a complete cylinder is the fix. The BEST 1CDF is a drill resistant preferred patented interchangeable core 7-pin brass cylinder in the 150 Series, which requires an interchangeable core housing. The Adams Rite 4036 Series is a Grade 1 five-pin mortise cylinder for a conventional mortise prep with a door thickness of 1/2 inch minimum.
14) Our facility standardized on full size interchangeable cores. Does the 121K11 fit that program?
No. The 121K11 is a conventional Corbin Russwin mortise cylinder plug in the D keyway family, offered in D1, D2, D3 and D4. An FSIC program uses removable cores instead: the Schlage 20-057 is a 6-pin FSIC rim cylinder with a convertible tailpiece cam, and the 20-057-C is a full size interchangeable core cylinder in the C keyway with a 643E aged bronze finish. Mixing the two means the housings have to match the core format you standardize on.
15) Is this cylinder plug suitable for high-traffic commercial doors, or is it a residential part?
Commercial. The 121K11 is built to Corbin Russwin's commercial standards and is used in office buildings, schools, hospitals, municipal buildings, retail, warehouses and multi-tenant residential. For a facilities or MRO buyer standardizing a building on one keyway, ordering plugs in a single D keyway across your mortise cylinders keeps the key system consistent.
16) We run Emtek hardware on some suites. Is there an Emtek cylinder rather than the Corbin Russwin plug?
Yes, for Emtek openings the Emtek CY4 cylinder is sold each as an Emtek part. Medeco also offers Emtek-specific options: the 1065244 is a 5-pin rim lazy motion rim type cylinder supplied with an Emtek tailpiece. The Corbin Russwin 121K11 plug stays with Corbin Russwin mortise cylinder assemblies and its D keyway system.
How fast can I get the Corbin Russwin 121K11 D1 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 D1 626 come with a warranty?
Absolutely. The Corbin Russwin 121K11 D1 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 D1 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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