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 27A1 Keyway, Satin Brass

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Model: 606K78 27A1 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 27A1 Keyway, Satin Brass

The Corbin Russwin 606K78 is a 7-pin Individual X Class cylinder plug engineered specifically for 2-3/4" mortise lock applications. Featuring the 27A1 keyway and a Satin Brass finish, this commercial-grade replacement part integrates seamlessly into compatible Corbin Russwin mortise cylinder assemblies, delivering precision key control and reliable rekeying capability for professional locksmiths and facility maintenance teams.

Key Features

  • 7-Pin Individual X Class Configuration: Provides enhanced key control through the X Class pin specification, supporting precise cylinder customization and master key system compatibility.
  • 2-3/4" Mortise Compatibility: Designed specifically for 2-3/4" mortise lock cylinders, ensuring proper fit within standard commercial mortise lock bodies.
  • 27A1 Keyway: Incorporates the Corbin Russwin 27A1 keyway specification for accurate key blank selection and controlled key duplication.
  • Satin Brass Finish: Finished in Satin Brass to complement coordinated commercial door hardware installations.
  • Commercial-Grade Construction: Built to Corbin Russwin's professional standards for use in demanding commercial environments where reliable cylinder performance is essential.
  • Direct Replacement Part: Serves as a genuine Corbin Russwin cylinder part, maintaining original manufacturer specifications for rekeying, re-pinning, or cylinder restoration projects.

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 27A1
  • Features: Corbin Russwin Cylinder Parts

Typical Applications

  • Commercial Office Buildings Requiring Rekeying or Cylinder Maintenance
  • Educational Facilities with Mortise Lock Hardware
  • Healthcare Institutions Using Corbin Russwin Mortise Systems
  • Government and Municipal Buildings with Master Key Systems
  • Multi-Tenant Residential and Mixed-Use Properties
  • Hospitality and Hotel Door Hardware Maintenance
  • Industrial and Institutional Facilities Performing Cylinder Restoration

Why Corbin Russwin 606K78?

Corbin Russwin cylinder parts are manufactured to exacting professional standards, ensuring that replacement plugs like the 606K78 maintain the precision tolerances required for reliable key control and smooth operation. Engineered for commercial applications, this plug integrates directly with compatible Corbin Russwin mortise cylinder assemblies, supporting the performance and longevity that facility managers and security professionals depend on.

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 27A1
Features:
Corbin Russwin Cylinder Parts

Corbin Russwin 606K78 27A1 626 – Frequently Asked Questions

1) Which keyway does the Corbin Russwin 606K78 plug use, and can I key it into my existing system?
The plug is cut for the Corbin Russwin 27A1 keyway, so it keys only into a system built on 27A1 blanks. That is the point of ordering it by keyway: it lets you re-pin a cylinder into an existing Corbin Russwin master key system with controlled key duplication. If your building runs a different Corbin Russwin section, the 27A1 plug will not accept those keys.
2) I have 6-pin Corbin Russwin cylinders in my building. Will the 606K78 plug work in them?
No. The 606K78 is built to a 7-pin Individual X Class configuration, so it belongs in a 7-pin Corbin Russwin mortise cylinder. Dropping a 7-pin plug into a 6-pin housing will not give you correct pin chamber alignment. Match the plug to the pin count of the cylinder shell you are rebuilding.
3) I need a complete 1-1/8 inch mortise cylinder, not just a plug. What should I order instead of the Corbin Russwin 606K78?
The Corbin Russwin 606K78 is a cylinder plug - a replacement part for rekeying or re-pinning an existing Corbin Russwin mortise cylinder assembly, not a standalone cylinder you can thread into a lock body. If the opening needs a whole mortise cylinder, the Detex MC65 is a 1-1/8 inch 6-pin commercial-grade mortise cylinder in the Schlage C keyway, and the Adams Rite 4036 is a Grade 1 five-pin mortise cylinder. Both are complete cylinders rather than internal parts.
4) Can I use a BEST interchangeable core in place of the Corbin Russwin 606K78 plug?
No - they solve the keying problem in different ways. The 606K78 is a 7-pin Individual X Class plug pinned to the Corbin Russwin 27A1 keyway, installed inside an existing mortise cylinder shell, so rekeying means re-pinning the plug. A BEST 1CDF is a drill-resistant patented 7-pin interchangeable core in the 150 series, and the BEST Peaks 1CB is a 150 series interchangeable core; those pull out with a control key and swap as a unit, which requires a housing built for interchangeable cores rather than a conventional Corbin Russwin mortise cylinder.
5) Is there an interchangeable core option instead of re-pinning a plug like the 606K78?
If you would rather swap cores than pin plugs, an interchangeable core system is the alternative approach. The BEST 1C Series standard 5-pin core and the BEST 1CDF drill resistant patented 7-pin core in the 150 Series are IC cores that pull with a control key, no cylinder disassembly. The 606K78 is the other route: you keep the Corbin Russwin mortise cylinder and re-pin the plug itself.
6) What is the closest 7-pin alternative to the Corbin Russwin 606K78 if I am standardizing a facility on one keying platform?
Among 7-pin options, the BEST 1CDF is the nearest peer in pin count - a drill-resistant patented 7-pin brass interchangeable core in the 150 series. The difference is the platform: the 606K78 is a 7-pin Individual X Class plug on the Corbin Russwin 27A1 keyway that serves conventional Corbin Russwin mortise cylinders, while the 1CDF is a removable core. Standardizing on the 1CDF means core-accepting housings throughout; staying with the 606K78 keeps existing Corbin Russwin mortise cylinders in service and rekeys them in place.
7) Is a rim cylinder like the Schlage 20-021 an acceptable substitute for the Corbin Russwin 606K78?
No. The 606K78 is a plug for a 2-3/4 inch Corbin Russwin mortise cylinder. The Schlage 20-021 and 20-022 are 6-pin rim cylinders - the 20-021 with a vertical tailpiece cam and the 20-022 with a horizontal tailpiece cam - which mount through the door behind rim exit devices rather than threading into a mortise lock body. Rim and mortise cylinders are not interchangeable prep.
8) I have a key-in-lever or deadbolt cylinder to replace, not a mortise cylinder. What fits that instead of the 606K78?
The Corbin Russwin 606K78 is built for 2-3/4 inch mortise cylinder assemblies. For key-in-knob and key-in-lever work, the Kaba Ilco 1539 is a universal key-in-knob/lever cylinder and the Kaba Ilco 1579 is a knob and lever cylinder for Sargent locks; the Kaba Ilco 1549 is a key-in-deadbolt cylinder and the 1599 is a key-in-knob replacement cylinder. 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.
9) The opening does not need to be keyed at all. Is there a simpler option than the Corbin Russwin 606K78?
If the cylinder position is only there to fill the prep and no key function is required, the BEST 12E series dummy rim cylinder with a 1-5/32 inch diameter covers the hole without pins or a keyway. The 606K78 exists to provide key control - it is a 7-pin Individual X Class plug on the 27A1 keyway for rekeying and master key work - so it is the wrong part for a non-keyed position.
10) I am working on an Adams Rite narrow stile aluminum door. Does the Corbin Russwin 606K78 apply?
No - the 606K78 is a plug for Corbin Russwin 2-3/4 inch mortise cylinder assemblies. Adams Rite narrow stile deadlocks take their own parts: the 4024 cylinder pull mounts with a trim plate for MS1847 deadlock/deadlatch systems, the 4025 is a five pin tumbler cylinder pull with through-screws for the same MS1847, and the 4026 is a five pin tumbler cylinder pull for the 5017 wood door deadlock/deadlatch. For the cylinder itself, the Adams Rite 4036 is a Grade 1 five-pin mortise cylinder with a 1/2 inch minimum door thickness.
11) How does the Corbin Russwin 606K78 differ from a Schlage FSIC core like the 20-057?
Both are the keyed element rather than the full housing, but they serve different systems. The 606K78 is a 7-pin Individual X Class plug on the Corbin Russwin 27A1 keyway, pinned into a 2-3/4 inch Corbin Russwin mortise cylinder. The Schlage 20-057 is a 6-pin full size interchangeable core rim cylinder with a convertible tailpiece cam, and the 20-057-C is an FSIC core in the C keyway with a 643E Aged Bronze finish. FSIC cores require a Schlage full size interchangeable core housing.
12) Is the Corbin Russwin 606K78 plug suitable for commercial buildings or is it a residential part?
It is a commercial part. Corbin Russwin lists it for commercial use, and the typical jobs are office buildings, schools, hospitals, government facilities, hotels, and multi-tenant residential where Corbin Russwin mortise hardware is already installed and cylinders are being rekeyed or restored.
13) Is the 606K78 a genuine Corbin Russwin part or an aftermarket plug?
Genuine Corbin Russwin. It is a factory cylinder part held to original manufacturer specification, which matters on a plug because the pin chamber tolerances have to match the shell you are putting it back into.
14) What are my options if I need high-security drill resistance rather than a standard Corbin Russwin plug?
The BEST 1CDF is a drill-resistant preferred patented interchangeable core, 7-pin brass, in the 150 series. On the retrofit side, Medeco offers cylinders that drop into existing residential-style hardware - the 1012040 is a 6-pin lazy motion rim cylinder for Kwikset single cylinder deadbolts, and the 1065140 is a 5-pin retrofit cylinder for Arrow JL interconnected locks and Emtek handleset and deadbolt outside cylinders. The Corbin Russwin 606K78 is a commercial 7-pin Individual X Class plug on the 27A1 keyway serving existing Corbin Russwin mortise cylinders.
15) Will the finish on a Corbin Russwin 606K78 match other cylinder hardware I am ordering?
The 606K78 plug comes in 606 Satin Brass and 626 Satin Chrome, so it can be matched to coordinated commercial trim in either family. Among comparable cylinder parts, the Schlage 20-057-C is offered in 643E Aged Bronze, which is a darker finish family and would not match either Corbin Russwin option. Confirm the finish of the surrounding cylinder collar and trim before ordering.
16) What should I use instead of the Corbin Russwin 606K78 for a residential handleset or deadbolt cylinder swap?
The 606K78 is a commercial part for Corbin Russwin mortise cylinder assemblies. For residential-style handlesets and deadbolts, the Medeco 1075127 is a 5-pin rim type lazy motion single cylinder for handlesets and deadbolts, and the Medeco 1065244 is a 5-pin rim lazy motion cylinder supplied with an Emtek tailpiece. Emtek hardware also takes the Emtek CY4 cylinder, sold each.
How fast can I get the Corbin Russwin 606K78 27A1 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 27A1 626 come with a warranty?
Absolutely. The Corbin Russwin 606K78 27A1 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 27A1 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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