Corbin Russwin 121K11 G Mortis...
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$63.00
$58.70
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Corbin Russwin 121K11 G Mortise Cylinder Plug with G Keyway, 1-1/8 in., Satin Brass

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Model: 121K11 G 626

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

$63.00
$58.70
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Corbin Russwin 121K11 G Mortise Cylinder Plug with G Keyway, 1-1/8 in., Satin Brass

The Corbin Russwin 121K11 G is a 1-1/8" mortise cylinder plug designed for commercial-grade mechanical lock applications. Featuring the G keyway and a satin brass finish, this replacement cylinder plug is engineered to integrate seamlessly with compatible Corbin Russwin mortise cylinder assemblies. Designed for professional door hardware installations where precision, reliability, and finish consistency are essential.

Key Features

  • Precise 1-1/8" Plug Diameter: Sized at 1-1/8" for accurate fitment in compatible Corbin Russwin mortise cylinder housings.
  • G Keyway Configuration: Factory-set G keyway ensures proper key control and compatibility within Corbin Russwin keying systems.
  • Satin Brass Finish: Corrosion-resistant satin brass finish provides a clean, professional aesthetic consistent with coordinated door hardware sets.
  • Commercial-Grade Construction: Manufactured to Corbin Russwin's commercial standards, delivering dependable performance in demanding institutional and commercial environments.
  • Genuine Corbin Russwin Cylinder Part: An authentic OEM replacement component, ensuring consistent function and compatibility with existing Corbin Russwin mortise lock assemblies.
  • Replacement Part Convenience: Designed as a drop-in replacement to restore or upgrade cylinder plug components 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 G
  • Features: Corbin Russwin Cylinder Parts

Typical Applications

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

Why Corbin Russwin 121K11?

Corbin Russwin cylinder components are engineered to exacting commercial standards, delivering the precision fit and keyway accuracy that professional locksmiths and facilities managers rely on. The 121K11 G cylinder plug is a genuine OEM part built to maintain the integrity and performance of Corbin Russwin mortise lock installations. For applications where compatibility and long-term reliability cannot be compromised, this replacement plug provides a trusted, specification-grade solution.

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 G
Features:
Corbin Russwin Cylinder Parts

Corbin Russwin 121K11 G 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 G is a 1-1/8 inch mortise cylinder plug, meant to drop into a compatible Corbin Russwin mortise cylinder housing rather than replace the whole cylinder. If you need a complete mortise cylinder for the opening, look at a full cylinder such as the Detex MC65, a 1-1/8 inch 6-pin commercial mortise cylinder, or the Adams Rite 4036 five-pin mortise cylinder.
2) What keyway does the Corbin Russwin 121K11 G plug use, and will it key into my existing system?
The plug comes with the G keyway factory-set, so it drops into a Corbin Russwin keying system built around G. If your building is keyed on a different Corbin Russwin section, this plug won't take your keys. Falcon also runs a G keyway on its RU/T series key-in-lever cylinder (A23161-05 G) if that is the family you are matching.
3) Is a Corbin Russwin 121K11 G plug the same thing as an interchangeable core?
No. The 121K11 G is a fixed mortise cylinder plug with a G keyway - the pin-carrying plug that sits inside a conventional Corbin Russwin mortise cylinder, serviced by a locksmith at the bench. An interchangeable core is a different system: the BEST 1C Series standard 5-pin core and the BEST Peaks 1CB 150 Series core pull out with a control key and swap in seconds, and the Schlage 20-057-C is a full size interchangeable core in C keyway. Housings prepped for IC accept those cores; a conventional mortise housing takes the 121K11 plug. The two are not interchangeable with each other.
4) 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 G is a 1-1/8 in. mortise cylinder plug, a replacement part meant to restore the plug inside an existing Corbin Russwin mortise cylinder housing. When the housing itself is damaged or the opening needs a complete cylinder, the Detex MC65 is a full mortise cylinder at the same 1-1/8 in. length, 6-pin, with a Schlage C keyway. Because the MC65 carries the Schlage C keyway rather than the Corbin Russwin G keyway, it will not key into an existing G-keyway masterkey system - plan on rekeying that opening or keeping the G plug if the building is mastered on G.
5) The exit device on the door takes a rim cylinder, not a mortise cylinder - what should be ordered instead of the 121K11?
The Corbin Russwin 121K11 G is a mortise cylinder plug for mortise cylinder assemblies, which thread into the lock body. Rim exit devices take a rim cylinder with a tailpiece instead. Schlage offers the 20-021 rim cylinder with a vertical tailpiece cam and the 20-022 with a horizontal tailpiece cam, both 6-pin and supplied with 2 keys; the 20-057 is a 6-pin FSIC rim cylinder with a convertible tailpiece cam. Match the cam orientation to what the exit device chassis requires.
6) What mortise cylinder suits a narrow stile aluminum storefront door instead of the Corbin Russwin 121K11 G?
The 121K11 G plug is intended for commercial Corbin Russwin mortise cylinder assemblies in standard mortise lock bodies. For narrow stile aluminum entrances, the Adams Rite 4036 is a Grade 1 mortise cylinder in the 4036 Series with five-pin security and a 1/2 in. minimum door thickness, which suits the thin stile section. Where the opening uses an Adams Rite MS1847 deadlock and needs a pull with an integral cylinder, the Adams Rite 4024 mounts with a trim plate and the 4025 is a five pin tumbler cylinder pull with through-screws; the 4026 five pin tumbler cylinder pull is for wood door applications with the 5017 wood door deadlock.
7) What finishes does the 121K11 mortise cylinder plug come in?
Two: 606 satin brass and 626 satin chrome. Pick the one that matches the lock trim on the rest of the opening, since the plug face is visible at the key.
8) Can I rebuild a worn Corbin Russwin mortise cylinder instead of buying a whole new one?
That is what this part is for. The 121K11 G is a genuine Corbin Russwin replacement plug, so a locksmith can swap the plug to restore a cylinder whose housing and cam are still good. It keeps the existing housing in the lock and avoids pulling the full cylinder out of the mortise case.
9) Can I use this plug in a rim cylinder or an exit device cylinder?
No. The 121K11 G is sized and built as a mortise cylinder plug at 1-1/8 inch. Rim applications use a rim cylinder with a tailpiece, for example the Schlage 20-021 with a vertical tailpiece cam or the 20-022 with a horizontal cam.
10) Will a Corbin Russwin 121K11 G plug work in a key-in-lever or key-in-knob lock?
No. The 121K11 G is a mortise cylinder plug and belongs in a Corbin Russwin mortise cylinder housing. Key-in-knob and key-in-lever chassis use a different cylinder format: the Kaba Ilco 1539 Series is a key-in-knob/lever universal cylinder, the 1599 is a key-in-knob replacement cylinder, the 1579 is a knob and lever cylinder for Sargent, and the Falcon A23161-05 G is a key-in-lever cylinder with a 6-pin G keyway supplied keyed different with 2 cut keys. The Falcon unit is the one in that group that shares the G keyway.
11) For a residential-style handleset or deadbolt retrofit, is the Corbin Russwin 121K11 G the right cylinder?
The 121K11 G is a commercial mortise cylinder plug and is built around Corbin Russwin mortise housings. Residential handlesets and deadbolts generally take a rim type lazy motion cylinder instead: the Medeco 1075127 is a 5-pin rim type lazy motion single cylinder for handlesets and deadbolts, the 1012040 is a 6-pin lazy motion rim cylinder for Kwikset single cylinder deadbolts, the 1065244 is a 5-pin rim lazy motion cylinder with an Emtek tailpiece, and the 1065140 is a 5-pin retrofit cylinder for Arrow JL interconnected locks and Emtek handleset and deadbolt outside cylinders. Emtek's own CY4 cylinder is also sold individually.
12) We need a non-keyed filler for an opening - can a 121K11 G plug be ordered blank?
The Corbin Russwin 121K11 G is a working cylinder plug with a factory-set G keyway, built to be pinned and keyed into a Corbin Russwin system. For an opening that needs the look of a cylinder without a working key, a dummy unit is the correct part - the BEST 12E Series dummy rim cylinder has a 1-5/32 in. diameter and is built for that purpose. Note the diameter difference: the 121K11 plug is 1-1/8 in., so the two are not dimensional swaps.
13) Is there a higher-security alternative if the 121K11 G plug is being attacked or drilled?
The 121K11 G is a standard commercial Corbin Russwin mortise cylinder plug in the G keyway. Where drilling and key duplication are the concern, the BEST 1CDF is a drill resistant preferred patented interchangeable core with 7 pins in brass, 150 Series, and Medeco cylinders such as the 1075127 5-pin rim type lazy motion unit are patented-key products. Moving to the BEST 1CDF means the housing must be prepped for an interchangeable core rather than a conventional plug, so it is a system change rather than a plug swap.
14) Our cylinders are 626 satin chrome throughout the building - does the 121K11 come that way, or do we need a different brand?
No need to switch brands. The Corbin Russwin 121K11 G mortise cylinder plug is offered in 626 satin chrome as well as 606 satin brass, so it can be matched to existing trim on either standard. By contrast, a peer such as the Schlage 20-057-C full size interchangeable core is listed in 643E aged bronze, which would not match a 626 set.
15) Is this plug suitable for a commercial building or is it a residential part?
Commercial. The 121K11 G is built to Corbin Russwin's commercial mechanical lock standards and is used in offices, schools, healthcare, government buildings, multi-tenant residential and warehouse facilities. For residential handleset and deadbolt retrofits, a Medeco rim cylinder such as the 1075127 is the relevant family instead.
How fast can I get the Corbin Russwin 121K11 G 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 G 626 come with a warranty?
Absolutely. The Corbin Russwin 121K11 G 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 G 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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