Corbin Russwin 606K78 7-Pin In...
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Corbin Russwin 606K78 7-Pin Individual X Class Cylinder Plug for 2-3/4" Mortise with 27B2 Keyway

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Model: 606K78 27B2 626

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

$94.00
$81.02
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Corbin Russwin 606K78 7-Pin Individual X Class Cylinder Plug for 2-3/4" Mortise with 27B2 Keyway

The Corbin Russwin 606K78 is a 7-Pin Individual X Class cylinder plug engineered specifically for 2-3/4" mortise applications and fitted with the 27B2 keyway. Finished in Satin Brass, this commercial-grade replacement part is designed to integrate seamlessly with compatible Corbin Russwin cylinder housings, offering a precision-fit solution for lock maintenance and rekeying projects in demanding commercial environments.

Key Features

  • 7-Pin X Class Configuration: Individual X Class plug with 7-pin tumbler design provides enhanced key control and security for commercial-grade mortise cylinder applications.
  • 2-3/4" Mortise Compatibility: Precisely engineered for 2-3/4" mortise cylinders, ensuring proper fit and reliable operation within compatible Corbin Russwin lock bodies.
  • 27B2 Keyway: Features the 27B2 keyway profile for controlled key duplication and compatibility with Corbin Russwin keying systems.
  • Satin Brass Finish: Durable Satin Brass finish complements a wide range of commercial door hardware aesthetics while resisting everyday wear.
  • Commercial-Grade Construction: Manufactured to Corbin Russwin standards for commercial door hardware, ensuring dependable performance in high-traffic institutional and commercial settings.
  • Genuine OEM Replacement Part: A certified Corbin Russwin cylinder component designed as a direct replacement part for maintaining and servicing existing mortise lock installations.

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: 606K78 27B2
  • 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 606K78?

Corbin Russwin cylinder components are manufactured to exacting commercial standards, making the 606K78 plug a reliable choice for locksmiths and facilities managers maintaining high-security mortise lock systems. The 7-pin X Class configuration and 27B2 keyway deliver the precision and key control integrity expected in demanding institutional and commercial applications where security and serviceability cannot be compromised.

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:
606K78 27B2
Features:
Corbin Russwin Cylinder Parts

Corbin Russwin 606K78 27B2 626 – Frequently Asked Questions

1) Is the Corbin Russwin 606K78 a complete mortise cylinder or just the plug?
It is the plug only, not a complete cylinder. The 606K78 is a 7-pin Individual X Class cylinder plug for 2-3/4 inch mortise applications, sold as a replacement part that goes into a compatible Corbin Russwin cylinder housing. If you need a whole cylinder to drop into a lock body, this is not it, you need a complete mortise cylinder assembly.
2) What keyway does the Corbin Russwin 606K78 plug use, and can I key it into my existing system?
The plug is cut for the 27B2 keyway, a Corbin Russwin profile. It will accept keys and pin to a keying system built on 27B2. If the rest of your building is on a different Corbin Russwin keyway, this plug will not take those keys, order the plug in the keyway your master system already uses.
3) Will a 7-pin X Class plug work in a 6-pin Corbin Russwin cylinder?
No. The 606K78 is built as a 7-pin Individual X Class plug and has to go into a 7-pin X Class housing with matching chamber count and keyway. Dropping it into a 6-pin shell leaves the chambers out of line and the cylinder will not turn. Match the pin count and the class before you order.
4) If the whole mortise cylinder needs replacing instead of just the plug, what complete mortise cylinder can be used?
The Corbin Russwin 606K78 is a cylinder plug only, intended to drop into a compatible Corbin Russwin housing for 2-3/4 inch mortise applications. When the entire cylinder is being replaced, a complete mortise cylinder such as the Detex MC65, a 1-1/8 inch 6-pin mortise cylinder with a Schlage C keyway, or the Adams Rite 4036 mortise cylinder with five-pin security covers the opening. Those two arrive as finished cylinders with their own keyways rather than a plug matched to a 27B2 Corbin Russwin keying system.
5) Is a small format interchangeable core the same thing as a 7-pin mortise cylinder plug?
No. The Corbin Russwin 606K78 is a 7-pin Individual X Class plug that seats inside an existing Corbin Russwin mortise cylinder shell. An interchangeable core such as the BEST 1CDF, a drill resistant patented 7-pin brass core in the 150 series, or the BEST 1C5 standard 5-pin core, is a removable figure-eight core that requires a housing built to accept cores. Both are 7-pin in the 1CDF case, but they are not interchangeable with one another.
6) Can a rim cylinder be used where a 2-3/4 inch mortise plug is called for?
No. Mortise and rim cylinders thread and cam differently. The Corbin Russwin 606K78 is engineered for 2-3/4 inch mortise cylinders in Corbin Russwin lock bodies. Rim applications, such as an exit device with a rim cylinder prep, take a part like the Schlage 20-021 6-pin rim cylinder with a vertical tailpiece cam or the 20-022 with a horizontal tailpiece cam, each supplied with two keys.
7) I manage a building on Corbin Russwin mortise locks, is replacing just the plug enough to rekey a door?
Yes, swapping the plug is the normal way to move a door onto a new key without pulling the lock body. The 606K78 goes into the existing 2-3/4 inch mortise cylinder housing, so the lock, trim, and strike all stay as they are. You still need the plug pinned to your key bitting and the keyway on the plug (27B2) has to match the keyway your keys are cut for.
8) What should I buy instead if I need a complete cylinder rather than a Corbin Russwin plug?
Depends on the lock. For a mortise cylinder in a Schlage C keyway, the Detex MC65 is a 1-1/8 inch 6-pin commercial mortise cylinder. For rim devices, Schlage's 20-021 (vertical tailpiece cam) and 20-022 (horizontal cam) are 6-pin rim cylinders. If your facility runs interchangeable core, the Schlage 20-057 FSIC rim cylinder or a BEST 1C 5-pin core would be the route instead of a fixed plug like the 606K78.
9) Can I use the 606K78 plug in an Adams Rite or Kaba Ilco cylinder?
No. The 606K78 is a Corbin Russwin plug machined for Corbin Russwin X Class housings in the 27B2 keyway, and it does not interchange with other manufacturers' shells. For Adams Rite narrow stile work, the 4036 mortise cylinder is a Grade 1 five-pin unit for that hardware, and Kaba Ilco's 1539 and 1599 series are knob and lever replacement cylinders rather than mortise plugs.
10) Why choose a 7-pin X Class plug over a standard pinned cylinder?
Key control. The X Class 7-pin arrangement gives more chambers to work with, which means deeper masterkeying and restricted duplication on the 27B2 profile. On a standard open keyway, anyone can have a copy cut at a hardware counter. That is the trade: X Class costs you a controlled key source, and buys you knowing who holds keys to the building.
11) What cylinder goes in a key-in-lever or key-in-knob lock instead of a mortise plug?
Key-in-lever and key-in-knob locksets take a cylinder built for that chassis, not a mortise plug. The Falcon A23161-05 G is a key-in-lever cylinder in the RU/T series with a 6-pin G keyway, keyed different with two cut keys, and the Kaba Ilco 1539 is a universal key-in-knob/lever cylinder. The Kaba Ilco 1599 is a key-in-knob replacement cylinder. The Corbin Russwin 606K78 is limited to 2-3/4 inch mortise cylinder service and rekeying.
12) Which cylinder suits a Sargent lever or a deadbolt rather than a Corbin Russwin mortise housing?
The Corbin Russwin 606K78 plug fits compatible Corbin Russwin mortise cylinder housings only. For a Sargent knob or lever, the Kaba Ilco 1579 is built for Sargent, and the Kaba Ilco 1549 is a key-in-deadbolt cylinder listed for deadbolt function. Those are brand-specific retrofit cylinders rather than plugs tied to a 27B2 keying system.
13) What goes into an aluminum storefront door with an Adams Rite MS1847 deadlock?
A Corbin Russwin 606K78 plug will not serve a storefront cylinder pull prep. For Adams Rite MS1847 deadlock and deadlatch systems, the 4024 cylinder pull mounts with a trim plate and the 4025 is a five pin tumbler cylinder pull with through-screws. For a wood door, the Adams Rite 4026 five pin tumbler cylinder pull is built for the 5017 wood door deadlock and deadlatch.
14) Is this Corbin Russwin plug suitable for commercial or residential doors?
Commercial. The 606K78 is built for commercial mortise lock service, the sort of work you see in offices, schools, healthcare, government buildings, and multi-tenant residential. On a residential knob or deadbolt you would be looking at a complete replacement cylinder rather than a mortise plug.
15) Is there a non-keyed option for an opening that only needs to look like it has a cylinder?
The Corbin Russwin 606K78 is a functioning 7-pin plug with the 27B2 keyway for controlled key duplication. Where an opening needs the appearance of a cylinder without keyed operation, the BEST 12E series dummy rim cylinder with a 1-5/32 inch diameter fills a rim prep instead.
16) What is the difference between the Corbin Russwin 606K78 plug and a high-security retrofit cylinder for residential-style handlesets?
The 606K78 is a commercial 7-pin X Class mortise plug for Corbin Russwin housings in institutional and commercial settings. Retrofit cylinders for handlesets and residential deadbolts are a different family: the Medeco 1075127 is a 5-pin rim type lazy motion single cylinder for handlesets and deadbolts, the Medeco 1012040 is a 6-pin lazy motion rim cylinder for Kwikset single cylinder deadbolts, and the Medeco 1065140 is a 5-pin retrofit for Arrow JL interconnected locks and Emtek handleset and deadbolt outside cylinders.
17) For Emtek hardware, what cylinder is used instead of the Corbin Russwin plug?
Emtek openings do not take the Corbin Russwin 606K78, which is matched to Corbin Russwin mortise housings and the 27B2 keyway. The Emtek CY4 cylinder is sold each as an Emtek part, and the Medeco 1065244 is a 5-pin rim lazy motion rim type cylinder supplied with an Emtek tailpiece.
How fast can I get the Corbin Russwin 606K78 27B2 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 606K78 27B2 626 come with a warranty?
Absolutely. The Corbin Russwin 606K78 27B2 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 606K78 27B2 626?
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