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 67A1 Keyway

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Model: 606K78 67A1 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 67A1 Keyway

The Corbin Russwin 606K78 67A1 is a 7-Pin Individual X Class cylinder plug engineered specifically for 2-3/4" mortise lock applications. Designed for use with the 67A1 keyway, this commercial-grade replacement cylinder plug delivers precise, reliable keying performance as part of a professionally managed key control system. Finished in Satin Brass, it integrates seamlessly into compatible Corbin Russwin mortise lock hardware for a consistent, polished appearance in commercial door hardware installations.

Key Features

  • 7-Pin X Class Configuration: Individual X Class plug with a 7-pin tumbler stack for enhanced key control and security differentiation in commercial keying systems.
  • 2-3/4" Mortise Compatibility: Precisely dimensioned for use in 2-3/4" mortise lock cylinders, ensuring correct fit and smooth operation with compatible hardware.
  • 67A1 Keyway: Features the Corbin Russwin 67A1 proprietary keyway, supporting controlled key duplication and organized master key system management.
  • Satin Brass Finish: Satin Brass finish provides a refined, professional appearance suited to commercial interior door hardware applications.
  • Genuine Corbin Russwin Cylinder Part: An authentic Corbin Russwin cylinder component, ensuring compatibility and performance consistency with Corbin Russwin mortise lock systems.
  • Commercial-Grade Construction: Built to the quality standards expected of Corbin Russwin mechanical lock components, designed for demanding commercial use environments.
  • Replacement Part Application: Ideal for servicing, re-keying, or upgrading existing Corbin Russwin mortise lock installations without replacing the entire cylinder assembly.

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 67A1
  • 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 trusted across demanding commercial environments for their precision manufacturing and reliable key control performance. The 606K78 67A1 plug upholds those standards as an authentic replacement part, ensuring that re-keying and servicing operations maintain the integrity of the original mortise lock system. For facilities requiring dependable, professionally managed keying systems, this genuine Corbin Russwin cylinder plug is an essential service component.

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 67A1
Features:
Corbin Russwin Cylinder Parts

Corbin Russwin 606K78 67A1 626 – Frequently Asked Questions

1) Is the Corbin Russwin 606K78 a complete mortise cylinder or just the plug?
It's the plug only, not a complete cylinder housing. The 606K78 67A1 is a 7-pin Individual X Class cylinder plug sized for 2-3/4 inch mortise lock cylinders, sold as a replacement part for re-keying or servicing an existing Corbin Russwin mortise lock rather than swapping the whole cylinder assembly. If you need a full mortise cylinder, order one of those instead.
2) Will a 606K78 plug work in my Corbin Russwin mortise cylinder if my system uses a different keyway?
No. This plug is cut for the Corbin Russwin 67A1 proprietary keyway, so it only accepts 67A1 keys and only belongs in a key system built on 67A1. Putting it into a lock keyed on another Corbin Russwin section means your existing keys won't enter. Confirm the keyway stamped on your current plug or listed in your key records before ordering.
3) I need to re-key a Corbin Russwin mortise lock without replacing the whole cylinder. Is this the part?
Yes, provided the cylinder is a 2-3/4 inch mortise on the 67A1 keyway. Swapping the plug lets you re-pin to new combinations while the cylinder shell, cam and lock body stay in the door, which is the fast way to handle a tenant turnover or a lost-key event across a floor. It is a locksmith-level part, so you'll be pinning it to your system chart.
4) If the whole mortise cylinder needs replacing instead of just the plug, what is a complete mortise cylinder option?
The Corbin Russwin 606K78 is a 7-pin cylinder plug for 2-3/4" mortise locks with the 67A1 keyway, so it only serves an existing cylinder body that is being re-keyed or serviced. When the entire cylinder is being swapped, the Adams Rite 4036 is a complete mortise cylinder with five-pin security, listed as Grade 1 in the 4036 Series with a 1/2" minimum door thickness. The Detex MC65 is another complete mortise cylinder, 1-1/8" with a 6-pin Schlage C keyway, for openings keyed to a Schlage C system rather than a Corbin Russwin 67A1 system.
5) What should I use if the lock takes a rim cylinder rather than a mortise cylinder?
The 606K78 plug is dimensioned for 2-3/4" mortise lock cylinders and will not serve a rim application. For rim openings, the Schlage Commercial 20-021 is a 6-pin rim cylinder with a vertical tailpiece cam supplied with 2 keys, and the 20-022 is the same 6-pin rim cylinder with a horizontal tailpiece cam. Choose between them by the cam orientation the exit device or rim lock requires.
6) Is an interchangeable core the same thing as this cylinder plug?
No. The Corbin Russwin 606K78 is a 7-pin X Class plug that is pinned into an existing mortise cylinder body as a service part. An interchangeable core is a complete keyed core that drops in and out with a control key: the BEST 1CB is a Peaks 150 Series interchangeable core cylinder, the BEST 1CDF is a drill resistant patented interchangeable core 7-pin brass 150 Series core, and the Schlage 20-057-C is a full size interchangeable core in the C keyway with a 643E Aged Bronze finish. Those require housings built for interchangeable cores, so they are not a substitute for re-plugging a conventional Corbin Russwin mortise cylinder.
7) What do I order for a key-in-lever or key-in-knob lock instead of this mortise plug?
The 606K78 fits 2-3/4" mortise lock cylinders, not bored lever or knob locks. For key-in-lever, 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. Kaba Ilco offers replacement cylinders for bored hardware as well: the 1539 Series key-in-knob/lever universal cylinder, the 1599 key-in-knob replacement cylinder, and the 1579 knob and lever cylinder for Sargent.
8) For an aluminum storefront with an Adams Rite MS1847 deadlock, is this cylinder plug the right part?
No. The 606K78 is a plug for 2-3/4" Corbin Russwin mortise cylinders. Storefront work on an Adams Rite MS1847 deadlock/deadlatch calls for a cylinder pull: the Adams Rite 4024 mounts with a trim plate and the 4025 is a five pin tumbler cylinder pull with through-screws, both for MS1847 systems. On wood doors, the Adams Rite 4026 five pin tumbler cylinder pull is for the 5017 wood door deadlock/deadlatch.
9) Why choose a 7-pin X Class plug over a standard 6-pin for a commercial building?
The 7-pin tumbler stack gives more key differentiation, which matters when you're running a master key system across a lot of doors and need room to expand without duplicating cuts. X Class is Corbin Russwin's restricted key control tier, so duplication stays controlled. For an office, school, hospital or multi-tenant property already standardized on X Class, this plug keeps that structure intact when you service a lock.
10) Can I use this Corbin Russwin plug in a rim cylinder or a key-in-lever cylinder?
No. The 606K78 is dimensioned for 2-3/4 inch mortise cylinders. For a rim application, the Schlage Commercial 20-021 and 20-022 are 6-pin rim cylinders (vertical and horizontal tailpiece cam respectively), and for key-in-knob or lever replacement the Kaba Ilco 1539 universal cylinder covers that role. Those are different brands and keyways, so they won't operate on a 67A1 key system.
11) Is there an interchangeable-core alternative if I don't want to pin plugs on site?
If your priority is re-keying without a locksmith pinning kit, an interchangeable core system is the other approach. BEST offers the 1CB Peaks 150 Series interchangeable core cylinder and the 1CDF drill-resistant patented 7-pin brass core, and Schlage offers the 20-057 6-pin full-size interchangeable core with a convertible tailpiece cam. Those are separate key systems from Corbin Russwin 67A1, so moving to them means re-keying the openings, not just swapping a part.
12) I need a 5-pin core instead of a 7-pin. What is available?
The Corbin Russwin 606K78 is built as a 7-pin stack for X Class key control. If the keying system runs 5-pin, the BEST 1C5 is a standard 5-pin cylinder core from the Standard and Premium Cores line. Within complete cylinders, the Adams Rite 4036 mortise cylinder is five-pin. Pin count has to match the system the opening is keyed into, so confirm the master key system before ordering either.
13) What is the right part for a deadbolt cylinder rather than a mortise lock?
The Corbin Russwin 606K78 is a mortise lock service plug. For deadbolts, the Kaba Ilco 1549 Series is a key-in-deadbolt cylinder with a deadbolt function, and Medeco lists several deadbolt-oriented cylinders: the 1012040 is a 6-pin lazy motion rim cylinder for Kwikset single cylinder deadbolts, the 1065140 is a 5-pin retrofit cylinder for the Arrow JL interconnected lock and Emtek handleset and deadbolt outside cylinder, and the 1075127 is a 5-pin rim type lazy motion single cylinder for handlesets and deadbolts.
14) I need a non-keyed filler for a rim opening. Does this plug work?
No. The Corbin Russwin 606K78 is a functioning keyed plug for a mortise cylinder. Where an opening needs a cylinder that does not operate, the BEST 12E Series dummy rim cylinder with a 1-5/32" diameter fills a rim prep without keying.
15) If the rim device tailpiece orientation is unknown, is there a cylinder that covers both?
The Corbin Russwin 606K78 is a mortise plug and does not carry a rim tailpiece. On the rim side, the Schlage Commercial 20-057 is a 6-pin FSIC rim cylinder with a convertible tailpiece cam supplied with 2 keys, where the fixed-cam alternatives are the 20-021 with a vertical tailpiece cam and the 20-022 with a horizontal tailpiece cam.
16) Does the Corbin Russwin 606K78 plug come with keys?
The 606K78 is supplied as a cylinder plug component for an X Class key system, which is pinned and keyed to your facility's chart by your locksmith or through your key records. Compare that with a keyed-different stock cylinder like the Falcon A23161-05 G key-in-lever cylinder, which ships keyed different with two cut keys. If you need cut keys, order them against your 67A1 system separately.
17) Is this plug suitable for a house or a small rental unit?
It's built for commercial service, and it only makes sense where a Corbin Russwin 67A1 X Class key system already exists, which is typical of offices, schools, healthcare, government buildings and multi-tenant properties. A single residential door doesn't need restricted key control at that level; a standard replacement cylinder such as the Emtek CY4 or a Kaba Ilco 1549 key-in-deadbolt cylinder fits that job better.
How fast can I get the Corbin Russwin 606K78 67A1 626 delivered?
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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 67A1 626 come with a warranty?
Absolutely. The Corbin Russwin 606K78 67A1 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 67A1 626?
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