Corbin Russwin 121K11 252 1-1/...
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$63.00
$58.70
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Corbin Russwin 121K11 252 1-1/8" Mortise Cylinder Plug and Keyway Replacement Part for Commercial Locks

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Model: 121K11 252 626

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

$63.00
$58.70
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Corbin Russwin 121K11 252 1-1/8" Mortise Cylinder Plug and Keyway Replacement Part

The Corbin Russwin 121K11 252 is a 1-1/8" mortise cylinder plug with keyway, engineered as a precision replacement part for commercial-grade mortise cylinder assemblies. Designed for use with compatible Corbin Russwin cylinder hardware, this component delivers the exacting dimensional tolerances and keyway specification required to restore or complete a mortise cylinder to proper operating condition. Rated for commercial applications, this cylinder plug is a genuine Corbin Russwin part built to the same standards as original equipment.

Key Features

  • Precise Dimensional Specification: 1-1/8" mortise cylinder plug size ensures accurate fit within compatible Corbin Russwin mortise cylinder housings.
  • Keyway Configuration: Includes the specified keyway (model 121K11) for controlled key interchange and proper key retention in commercial locking applications.
  • Genuine Replacement Component: Manufactured as an authentic Corbin Russwin cylinder part, maintaining original performance standards when replacing worn or damaged plug assemblies.
  • Commercial-Grade Construction: Engineered for demanding commercial environments where consistent, reliable cylinder operation is essential.
  • Mortise Cylinder Compatibility: Designed specifically for mortise-type cylinder applications, compatible with Corbin Russwin mortise lock hardware systems.
  • Simplified Serviceability: Allows in-field replacement of the cylinder plug component without full cylinder replacement, reducing maintenance costs and downtime.

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 252
  • 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 components are manufactured to precise commercial standards, ensuring that replacement parts like the 121K11 252 plug and keyway integrate seamlessly into existing hardware systems. As a genuine Corbin Russwin part, this mortise cylinder plug upholds the dimensional accuracy and keyway specification integrity that professional locksmiths and facility managers depend on for reliable, long-term performance in high-demand commercial settings.

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 252
Features:
Corbin Russwin Cylinder Parts

Corbin Russwin 121K11 252 626 – Frequently Asked Questions

1) Will the 121K11 plug fit a Schlage or BEST mortise cylinder?
No. It is a Corbin Russwin cylinder part, built for Corbin Russwin mortise cylinder housings and Corbin Russwin keyways. Plugs are not cross-brand items. For a Schlage keyway mortise cylinder, a complete unit like the Detex MC65 (1-1/8 inch, 6-pin, Schlage C keyway) is the kind of part to look at instead, and for BEST interchangeable core systems the BEST 1C 5-pin core is the replaceable element rather than a plug.
2) If I need a complete 1-1/8 inch mortise cylinder rather than just a replacement plug, what should I order instead?
The Corbin Russwin 121K11 252 is a 1-1/8 inch mortise cylinder plug and keyway replacement part, so it restores an existing Corbin Russwin mortise cylinder housing rather than supplying a whole cylinder. For a complete assembled mortise cylinder in the same 1-1/8 inch size, the Detex MC65 is a 1-1/8 inch 6-pin commercial mortise cylinder supplied with a Schlage C keyway. The Adams Rite 4036 is another full mortise cylinder, a five-pin unit in the 4036 Series rated Grade 1 with a 1/2 inch minimum door thickness.
3) We want to be able to swap keying without pulling the cylinder. Is the 121K11 plug the right approach?
The 121K11 252 plug is a serviceable component that lets a locksmith replace the plug and keyway inside an existing Corbin Russwin mortise cylinder instead of replacing the whole cylinder, and it is offered in keyways 252, 60, 70, 750, 751, 752, 852, 981, 982 and 983. If the goal is tool-free rekeying by core swap, an interchangeable-core system is the different approach: the BEST 1CB is a Peaks 1CB 150 Series interchangeable core cylinder, the BEST 1CDF is a drill-resistant patented interchangeable core in 7-pin brass, and the BEST 1C5 is a standard 5-pin cylinder core.
4) I manage a building keyed to a Corbin Russwin master system. Can I keep the plug on my existing masterkey system?
Yes, as long as you order the plug in the same keyway family your system uses (60, 70, 252, 750, 751, 752, 852, 981, 982 or 983). The plug ships as a plug and keyway, so your locksmith pins it to your existing master and change key bitting. Keeping the keyway consistent across doors is what lets one master key continue to work the whole building.
5) My Corbin Russwin mortise cylinder turns but the key sticks. Do I need a whole new cylinder?
Not necessarily. Worn pins and a worn plug are the usual cause of a sticking key, and the 121K11 lets you replace just the 1-1/8 inch plug and keyway inside the existing housing. That keeps the cylinder body, ring and cam in the door and cuts the downtime on the opening. If the housing itself is damaged or the cam is stripped, replace the complete cylinder instead.
6) Is the 121K11 a mortise cylinder part or a rim cylinder part?
Mortise. It is made for mortise-type cylinder applications in Corbin Russwin mortise lock hardware, so it does not serve a rim cylinder on an exit device. Rim applications take a complete rim cylinder, such as the Schlage 20-021 6-pin with a vertical tailpiece cam or the 20-022 with a horizontal cam, depending on which orientation your device needs.
7) What do I need to specify when ordering the Corbin Russwin 121K11?
Two things: the keyway and the finish. Keyway comes from what is already in service (60, 70, 252, 750, 751, 752, 852, 981, 982 or 983) and finish is 606 Satin Brass or 626 Satin Chrome. Keying itself is done at the bench, so have your bitting or master system information ready for whoever pins it.
8) What is the right part for a deadbolt cylinder if the Corbin Russwin 121K11 plug does not fit?
The 121K11 252 plug is specified for Corbin Russwin mortise cylinder hardware, and it is offered in 606 satin brass and 626 satin chrome. For deadbolt cylinders, the Kaba Ilco 1549 Series is a key-in-deadbolt cylinder. On residential-style handlesets and deadbolts, the Medeco 1075127 is a 5-pin rim type lazy motion single cylinder, the Medeco 1012040 is a 6-pin lazy motion rim cylinder for Kwikset single cylinder deadbolts, and the Medeco 1065244 is a 5-pin rim lazy motion cylinder supplied with an Emtek tailpiece.
9) Will the Corbin Russwin 121K11 plug work in an Emtek or Arrow lock?
The 121K11 252 is engineered for compatible Corbin Russwin mortise cylinder assemblies in commercial applications, so it is not a retrofit for those brands. For Emtek, the Emtek CY4 is the brand's own cylinder sold each, and the Medeco 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 as well as Emtek handleset and deadbolt outside cylinder positions.
10) What do I use for a key-in-knob or key-in-lever cylinder instead of the Corbin Russwin 121K11?
The 121K11 252 serves mortise cylinder assemblies, not knob or lever cylinders. For key-in-knob and key-in-lever work, the Kaba Ilco 1539 Series is a key-in-knob/lever universal cylinder and the Kaba Ilco 1579 is a knob and lever cylinder built for Sargent locks; the Ilco 1599 is a key-in-knob replacement cylinder. The Falcon A23161-05 G is a key-in-lever cylinder with a RU/T Series 6-pin G keyway, keyed different with two cut keys.
11) Is a cylinder pull like the Adams Rite 4025 an alternative to the Corbin Russwin 121K11?
No, they do different jobs. The 121K11 252 is a mortise cylinder plug with keyway that goes inside a Corbin Russwin mortise cylinder housing. The Adams Rite 4025 is a five-pin tumbler cylinder pull with through-screws made for the Adams Rite MS1847 deadlock/deadlatch, and the 4024 is a cylinder pull with trim plate mounting for the same MS1847 systems. For wood doors, the Adams Rite 4026 five-pin cylinder pull is intended for the Adams Rite 5017 wood door deadlock/deadlatch.
12) Our spec calls for a keyed-alike C keyway across the building. Does the Corbin Russwin 121K11 cover that?
The 121K11 252 plug is supplied in Corbin Russwin keyways including 252, 60, 70, 750, 751, 752, 852, 981, 982 and 983, which suits buildings already standardized on a Corbin Russwin keyway. If the standard is a Schlage C keyway instead, the Detex MC65 is a 1-1/8 inch 6-pin commercial mortise cylinder furnished in Schlage C, and the Schlage 20-057-C is a full size interchangeable core cylinder in C keyway with a 643E aged bronze finish.
13) What finishes does the Corbin Russwin 121K11 mortise cylinder plug come in?
Two: 606 Satin Brass and 626 Satin Chrome. Match the plug face to the existing cylinder ring or escutcheon so the exposed face does not read as a mismatch, 626 with chrome and brushed nickel trim, 606 with brass.
14) Is this plug rated for commercial door traffic, or is it a residential part?
Commercial. Corbin Russwin lists the 121K11 252 as a commercial-grade mortise cylinder component, and it is the part locksmiths and facility staff use in offices, schools, hospitals, government buildings, retail, multi-tenant residential and warehouse settings.
15) I need a non-keyed filler for an opening, not a working plug. What takes the place of the Corbin Russwin 121K11 there?
The 121K11 252 includes a working keyway for controlled key interchange and key retention, so it is not a blank filler. Where a cylinder body is needed only for appearance or to fill a prep, the BEST 12E Series dummy rim cylinder measures 1-5/32 inch in diameter and provides no keyed function.
How fast can I get the Corbin Russwin 121K11 252 626 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 252 626 come with a warranty?
Absolutely. The Corbin Russwin 121K11 252 626 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 252 626?
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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