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

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Model: 121K11 59B2 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" Mortise Cylinder Plug with 59B Keyway

The Corbin Russwin 121K11 59B1 is a 1-1/8" mortise cylinder plug designed for use with the 59B keyway, delivering a precision-fit replacement component for commercial-grade mortise cylinder assemblies. Engineered as an authentic Corbin Russwin cylinder part, this plug is built to restore or maintain the performance of existing mortise cylinder hardware in demanding commercial applications. Its straightforward compatibility with the 59B keyway ensures seamless integration into compatible Corbin Russwin cylinder housings.

Key Features

  • Precise 1-1/8" Plug Diameter: Sized at 1-1/8" to fit standard mortise cylinder housings, ensuring accurate and secure installation in compatible assemblies.
  • 59B Keyway Compatibility: Configured for the 59B keyway profile, providing proper key engagement and maintained security within the Corbin Russwin keying system.
  • Genuine Corbin Russwin Cylinder Part: Manufactured as an authentic replacement component, maintaining the integrity and performance of Corbin Russwin mortise cylinder hardware.
  • Commercial-Grade Application: Designed for commercial door hardware environments where reliable cylinder performance and consistent key control are essential.
  • Targeted Replacement Solution: Allows targeted restoration of a mortise cylinder assembly without requiring 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 59B1
  • Features: Corbin Russwin Cylinder Parts

Typical Applications

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

Why Corbin Russwin 121K11?

Corbin Russwin cylinder components are manufactured to exacting tolerances, ensuring that replacement parts like the 121K11 59B1 plug deliver the same precise fit and key control performance as the original hardware. Specifying genuine Corbin Russwin parts for mortise cylinder maintenance preserves the security integrity and operational reliability of the overall locking system in professional commercial environments.

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 59B1
Features:
Corbin Russwin Cylinder Parts

Corbin Russwin 121K11 59B2 626 – Frequently Asked Questions

1) What exactly is the Corbin Russwin 121K11 - a whole cylinder or just the plug?
It's just the plug, the keyed core barrel that drops into a mortise cylinder housing, not a complete cylinder assembly. The 121K11 is a 1-1/8 inch mortise cylinder plug set up for the 59B keyway family. If your existing housing, cam and shell are fine and only the keyed plug needs changing, this is the part. If the housing itself is damaged or you need a full cylinder, order a complete mortise cylinder instead, such as the Detex MC65 1-1/8 inch 6-pin mortise cylinder.
2) Will a 1-1/8 inch mortise cylinder plug fit my existing Corbin Russwin housing?
The 1-1/8 inch size is the standard mortise cylinder length used across most commercial Corbin Russwin mortise locks, so it fits standard 1-1/8 inch mortise cylinder housings. Measure the length of the cylinder currently in the door. If yours is a longer 1-1/4 inch or 1-3/8 inch cylinder, the 121K11 plug is the wrong length for that shell.
3) Do I have to specify B1 or B2 keyway when ordering the 121K11?
Yes, and it's the decision that matters most. The plug is offered in B1 and B2 keyway, both within the Corbin Russwin 59B family. Pull an existing key and match the keyway stamp, or check the keying schedule for the building. A B2 plug will not accept a B1 key, so ordering the wrong one leaves you with a plug nobody can operate.
4) I manage a building keyed on Corbin Russwin 59B - can I rekey doors with these plugs instead of buying full cylinders?
That's the point of the part. Swapping the keyed plug restores or changes a mortise cylinder without replacing the whole cylinder, which keeps the existing housings and cams in the door and cuts the cost of a rekey across a fleet of openings. Keep the keyway consistent (B1 or B2) across the doors you want on one key.
5) If I need a complete 1-1/8 inch mortise cylinder rather than just the plug, what should I order?
The Corbin Russwin 121K11 is a 1-1/8 inch mortise cylinder plug with the 59B keyway - a replacement part that goes into an existing Corbin Russwin cylinder housing, not a finished cylinder. If the housing is gone or damaged, a whole mortise cylinder is the right item: the Detex MC65 is a 1-1/8 inch 6-pin mortise cylinder in the Schlage C keyway, and the Adams Rite 4036 is a Grade 1 mortise cylinder in the 4036 Series with a 1/2 inch minimum door thickness. Both are complete cylinders keyed to their own systems, so they will not carry a Corbin Russwin 59B key.
6) We rekey doors constantly - is a plug like the 121K11 the right approach or should we move to interchangeable cores?
The Corbin Russwin 121K11 plug is a targeted repair part for an existing Corbin Russwin mortise cylinder assembly, so servicing it is a bench operation on the cylinder. For a facility that rekeys frequently, an interchangeable-core platform swaps the core at the door instead: BEST offers the 1C 5-pin standard cylinder core, the 1CB 150 Series interchangeable core, and the 1CDF drill-resistant patented 7-pin brass interchangeable core in the 150 Series. Schlage's 20-057 is a 6-pin full size interchangeable core rim cylinder, and the 20-057-C is an FSIC core in the C keyway with a 643E aged bronze finish. Those are separate keying systems from Corbin Russwin 59B.
7) My exit device takes a rim cylinder, not a mortise cylinder - what do I order instead of the 121K11?
The Corbin Russwin 121K11 is a mortise cylinder plug and will not serve a rim application. For rim prep, the Schlage 20-021 is a 6-pin rim cylinder with a vertical tailpiece cam supplied with two keys, and the 20-022 is the same 6-pin rim cylinder with a horizontal tailpiece cam and two keys. The 20-057 is a 6-pin FSIC rim cylinder with a convertible tailpiece cam. Match the cam orientation to what the device requires.
8) My lock takes a rim cylinder, not a mortise cylinder - can I use this?
No. A mortise cylinder plug like the 121K11 goes into a threaded mortise cylinder shell driven by a cam, while rim cylinders mount through the door behind a rim exit device and drive a tailpiece. For rim applications look at a rim cylinder such as the Schlage 20-021 with a vertical tailpiece cam or the 20-022 with a horizontal cam.
9) Can I use this plug if I want interchangeable cores instead?
No. The 121K11 is a fixed keyed plug for a conventional Corbin Russwin mortise cylinder, so every rekey means pinning the plug. If you want to swap keying by pulling a core with a control key, go with an interchangeable core system instead, such as the BEST 1CB 150 Series interchangeable core or a full size interchangeable core like the Schlage 20-057 FSIC rim cylinder.
10) Will the 121K11 plug work in a key-in-knob or key-in-lever lockset?
No - the Corbin Russwin 121K11 is sized at 1-1/8 inch for mortise cylinder housings. Key-in-knob and key-in-lever locks take a different cylinder body: Kaba Ilco offers the 1539 Series key-in-knob/lever universal cylinder, the 1579 for Sargent knob and lever locks, and the 1599 key-in-knob replacement cylinder. Falcon's A23161-05 G is a key-in-lever cylinder for the RU/T Series with a 6-pin G keyway, keyed different with two cut keys.
11) We have Adams Rite MS1847 deadlocks on our aluminum storefronts - does the 121K11 fit those?
The Corbin Russwin 121K11 is a plug for Corbin Russwin mortise cylinder assemblies and is not a storefront cylinder pull. For MS1847 deadlock and deadlatch openings, Adams Rite offers the 4024 cylinder pull with trim plate mounting and the 4025 five pin tumbler cylinder pull with through-screws. For wood door work, the 4026 five pin tumbler cylinder pull is designed for the Adams Rite 5017 wood door deadlock/deadlatch.
12) What do I use for a deadbolt cylinder instead of the 121K11?
The Corbin Russwin 121K11 is a mortise cylinder plug, so it does not cover deadbolt prep. Kaba Ilco's 1549 Series is a key-in-deadbolt cylinder listed for deadbolt function. Medeco offers several deadbolt and handleset cylinders: the 1012040 is a 6-pin lazy motion rim cylinder for Kwikset single cylinder deadbolts, the 1075127 is a 5-pin rim type lazy motion single cylinder for handlesets and 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 the Arrow JL interconnected lock and Emtek handleset and deadbolt outside cylinder.
13) Is the 121K11 plug rated for commercial door traffic or is it a residential part?
Commercial. Corbin Russwin lists the 121K11 59B1 as a commercial cylinder part, intended for mortise cylinder hardware in offices, schools, healthcare, government buildings, retail, warehouses and multi-tenant residential.
14) Is the Emtek CY4 a substitute for the Corbin Russwin 121K11 plug?
No. The Corbin Russwin 121K11 is a 1-1/8 inch mortise cylinder plug with the 59B keyway, offered in 606 satin brass and 626 satin chrome with B1 and B2 keyway options, and it is a commercial replacement part for Corbin Russwin mortise cylinder housings. The Emtek CY4 is a cylinder sold as a single Emtek part, so it belongs to Emtek hardware rather than a Corbin Russwin mortise assembly.
15) I need a non-keyed filler for a cylinder hole on an inactive door - is the 121K11 an option?
The Corbin Russwin 121K11 is a keyed plug configured for the 59B keyway and is intended to restore key function in a Corbin Russwin mortise cylinder. For an opening that needs no key, the BEST 12E Series dummy rim cylinder has a 1-5/32 inch diameter and is a dummy rather than an operating cylinder.
How fast can I get the Corbin Russwin 121K11 59B2 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 59B2 626 come with a warranty?
Absolutely. The Corbin Russwin 121K11 59B2 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 59B2 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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