Corbin Russwin 606K78 7-Pin In...
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Corbin Russwin 606K78 7-Pin Individual X Class Plug for 2-3/4" Mortise with 27B1 Keyway in Satin Brass

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Model: 606K78 27B1 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 Plug for 2-3/4" Mortise with 27B1 Keyway in Satin Brass

The Corbin Russwin 606K78 is a 7-Pin Individual X Class replacement cylinder plug designed specifically for 2-3/4" mortise applications. Featuring the 27B1 keyway and a satin brass finish, this commercial-grade cylinder part delivers precise key control and dependable performance as a direct replacement component within compatible Corbin Russwin cylinder assemblies. Engineered for commercial door hardware, this plug is a genuine Corbin Russwin cylinder part built to maintain the integrity and security of the original lock installation.

Key Features

  • 7-Pin X Class Configuration: Individual X Class plug with 7-pin tumbler design for enhanced key control and security in commercial lock systems.
  • Mortise Cylinder Compatibility: Designed for 2-3/4" mortise applications, ensuring precise fit within compatible Corbin Russwin mortise cylinder housings.
  • 27B1 Keyway: Features the 27B1 keyway profile for reliable key guidance and proper key-to-plug alignment in commercial keying systems.
  • Satin Brass Finish: Factory-applied satin brass finish provides a professional appearance consistent with coordinated commercial door hardware installations.
  • Genuine Corbin Russwin Cylinder Part: Manufactured as an authentic Corbin Russwin component, maintaining OEM specifications for compatibility and performance.
  • Commercial-Grade Construction: Built to the quality standards expected of Corbin Russwin cylinder products for demanding commercial environments.

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 27B1
  • 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 replacement parts are engineered to OEM standards, ensuring that security and operational integrity are fully maintained when servicing or rekeying commercial lock installations. The 606K78 plug's 7-pin X Class design supports robust key control in professional-grade mortise cylinder systems. For facility managers and locksmiths who demand authentic components, this Corbin Russwin part provides the confidence of a genuine replacement built to original specifications.

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 27B1
Features:
Corbin Russwin Cylinder Parts

Corbin Russwin 606K78 27B1 626 – Frequently Asked Questions

1) What keyway does the Corbin Russwin 606K78 plug use, and will my existing keys work?
The plug is cut for the 27B1 keyway. Your keys only operate it if they are 27B1 blanks and the plug is pinned to your combination. A plug in one keyway will not accept a key of a different Corbin Russwin section, so match 27B1 to the rest of the system before you pin it.
2) Will the 606K78 plug fit a 1-1/8 inch mortise cylinder?
No. This plug is built for 2-3/4 inch mortise cylinder applications. A shorter housing takes a correspondingly shorter plug, so measure the cylinder length before ordering. For a short commercial mortise cylinder in another brand, the Detex MC65 is a 1-1/8 inch 6-pin mortise cylinder with a Schlage C keyway.
3) If I need a complete mortise cylinder rather than just a replacement plug, what should I order instead of the Corbin Russwin 606K78?
The 606K78 27B1 is a replacement cylinder plug, catalogued as a replacement part, so it goes into an existing Corbin Russwin mortise housing rather than serving as a standalone cylinder. When the job calls for a whole mortise cylinder, the Detex MC65 is a 1-1/8 inch 6-pin mortise cylinder with a Schlage C keyway, and the Adams Rite 4036 is a Grade 1 mortise cylinder with five-pin security. Both are complete cylinders, so they carry their own keyway and will not run on a Corbin Russwin 27B1 key system.
4) Can I use a BEST interchangeable core in place of a Corbin Russwin 606K78 7-pin plug?
No. The 606K78 is a 7-pin individual X Class plug that fits inside a compatible Corbin Russwin mortise cylinder housing and keys to the 27B1 keyway. BEST interchangeable cores, such as the 1CB 150 Series core or the 1CDF drill-resistant patented 7-pin brass 150 Series core, are figure-eight interchangeable cores that drop into BEST-prepped housings; a 7-pin BEST core and a 7-pin Corbin Russwin plug are not the same component and do not interchange.
5) My door uses a rim exit device, not a mortise lock. Is the 606K78 the right cylinder part?
No. The 606K78 plug is built for 2-3/4 inch mortise cylinder applications. For a rim device you want a rim cylinder: the Schlage 20-021 is a 6-pin rim cylinder with a vertical tailpiece cam, the 20-022 is the same 6-pin rim cylinder with a horizontal tailpiece cam, and the 20-057 is a 6-pin FSIC rim cylinder with a convertible tailpiece cam. Each ships with 2 keys.
6) What do I order if the cylinder I am replacing is in a key-in-lever or key-in-knob lock instead of a mortise body?
The 606K78 27B1 plug serves Corbin Russwin mortise cylinders. For key-in-knob and key-in-lever bodies, the Kaba Ilco 1539 is a universal key-in-knob/lever cylinder, the 1579 is a knob and lever cylinder for Sargent locks, the 1599 is a key-in-knob replacement cylinder, and 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 2 cut keys.
7) Is this a genuine Corbin Russwin part or an aftermarket copy?
Genuine OEM. The 606K78 is manufactured by Corbin Russwin to original specifications, which matters on X Class because a non-OEM plug will not hold the restricted key section or the factory keying records.
8) Can I use this plug to convert a lock to an interchangeable core system?
No. The 606K78 is a conventional mortise cylinder plug, so it services an existing Corbin Russwin mortise cylinder rather than converting the opening to IC. If you want removable cores for fast rekeying, go to an interchangeable core product such as the BEST 1CB 150 Series core, the BEST 1CDF drill resistant 7-pin core, or a Schlage 20-057 full size interchangeable core cylinder.
9) What is the simpler 5-pin alternative if 7-pin X Class key control is more than the opening needs?
The 606K78 uses a 7-pin individual X Class design for higher key control in Corbin Russwin mortise cylinders. Where a basic 5-pin cylinder is sufficient, the BEST 1C Series standard 5-pin cylinder core and the Adams Rite 4036 five-pin mortise cylinder are 5-pin options. They are separate products on their own keyways, so they will not be operated by an existing 27B1 key.
10) Is there an equivalent to the 606K78 plug for a deadbolt cylinder?
The 606K78 is a mortise cylinder plug, not a deadbolt part. For deadbolt work, the Kaba Ilco 1549 is a key-in-deadbolt cylinder, the Medeco 1012040 is a 6-pin lazy motion rim cylinder for Kwikset single cylinder deadbolts, and the Medeco 1075127 is a 5-pin rim type lazy motion single cylinder for handlesets and deadbolts.
11) Will the 606K78 work with an Adams Rite MS1847 aluminum storefront deadlock?
The 606K78 is a Corbin Russwin plug for 2-3/4 inch mortise cylinder housings, so it is not a storefront cylinder pull. For MS1847 deadlock and deadlatch systems, the Adams Rite 4024 cylinder pull mounts with a trim plate and the 4025 is a five pin tumbler cylinder pull with through-screws. On a wood door, the 4026 five pin tumbler cylinder pull is designed for the Adams Rite 5017 wood door deadlock/deadlatch.
12) For an Emtek handleset or an Arrow interconnected lock, is the Corbin Russwin plug a substitute?
It is not. The 606K78 plug is a commercial Corbin Russwin mortise cylinder component. The Medeco 1065140 is a 5-pin retrofit cylinder for the Arrow JL interconnected lock and for Emtek handleset and deadbolt outside cylinders, and the Medeco 1065244 is a 5-pin rim lazy motion rim type cylinder supplied with an Emtek tailpiece.
13) What finishes is the Corbin Russwin 606K78 plug available in?
Two: 606 satin brass and 626 satin chrome. Pick the one that matches the cylinder ring and trim already on the door, since the plug face is the visible part.
14) Is the 606K78 plug suitable for residential doors?
It is classed as commercial. The 7-pin X Class plug is intended for commercial lock installations such as office buildings, healthcare, education and multi-tenant residential properties, not for standalone house hardware. For a residential handleset or deadbolt cylinder, retrofit parts like the Medeco 1065140 for Emtek handlesets and deadbolts are the closer fit.
15) We only need the appearance of a cylinder on a non-keyed door. Does the 606K78 cover that?
No. The 606K78 is a functioning 7-pin X Class plug that carries the 27B1 keyway for actual key operation. For an opening that needs the look without keyed function, the BEST 12E Series dummy rim cylinder with a 1-5/32 inch diameter is the non-functioning option, and the Emtek CY4 cylinder is sold as a single piece part.
16) We are matching finishes across a building. What finishes does the 606K78 plug come in, and how does that compare with the FSIC alternatives?
The 606K78 27B1 plug is offered in 606 satin brass and 626 satin chrome. If the standardization path is full size interchangeable cores instead, the Schlage 20-057-C is an FSIC cylinder with a C keyway in 643E aged bronze. The two are different components on different key systems, so finish matching alone does not make them interchangeable.
How fast can I get the Corbin Russwin 606K78 27B1 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 27B1 626 come with a warranty?
Absolutely. The Corbin Russwin 606K78 27B1 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 27B1 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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