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 77B2 Keyway

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Model: 606K78 77B2 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 77B2 Keyway

The Corbin Russwin 606K78 is a 7-Pin Individual X Class Plug engineered specifically for 2-3/4" mortise cylinder applications with the 77B2 keyway configuration. Finished in Satin Brass, this precision replacement plug is designed to integrate seamlessly with compatible Corbin Russwin mortise cylinder housings, delivering the exacting tolerances and security standards that commercial door hardware demands. As a genuine Corbin Russwin cylinder part, it ensures direct compatibility and reliable performance in high-traffic commercial installations.

Key Features

  • 7-Pin Configuration: Individual X Class plug with a 7-pin tumbler stack for enhanced key control and security in commercial applications.
  • Mortise Application Compatibility: Designed specifically for 2-3/4" mortise cylinders, ensuring precise fit within standard commercial mortise lock bodies.
  • 77B2 Keyway: Configured with the 77B2 keyway for compatibility with Corbin Russwin keying systems, supporting organized master key programs.
  • Satin Brass Finish: Factory-applied Satin Brass finish coordinates with complementary door hardware for a consistent, professional appearance.
  • Genuine Corbin Russwin Cylinder Part: Manufactured to OEM specifications, ensuring dimensional accuracy and reliable operation within Corbin Russwin mortise cylinder assemblies.
  • Commercial-Grade Construction: Built to the quality standards of Corbin Russwin's commercial cylinder product line for dependable performance in demanding environments.
  • Replacement Part Precision: Engineered as a direct replacement component, facilitating field servicing of existing Corbin Russwin mortise cylinders without full cylinder replacement.

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 77B2
  • Features: Corbin Russwin Cylinder Parts

Typical Applications

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

Why Corbin Russwin 606K78?

Corbin Russwin cylinder components are manufactured to OEM tolerances, ensuring that replacement parts like the 606K78 plug integrate with the same precision and reliability as original factory-installed hardware. Specified for commercial applications with the 77B2 keyway and 7-pin X Class configuration, this plug supports sophisticated master key systems and long-term serviceability in professional door hardware programs.

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 77B2
Features:
Corbin Russwin Cylinder Parts

Corbin Russwin 606K78 77B2 626 – Frequently Asked Questions

1) What exactly is the Corbin Russwin 606K78 plug, and is it a complete cylinder?
It is the plug only, not a whole cylinder. The 606K78 is a 7-pin Individual X Class cylinder plug made for 2-3/4 inch Corbin Russwin mortise cylinder applications with the 77B2 keyway. You install it into an existing compatible Corbin Russwin mortise cylinder housing, which is what lets a locksmith re-plug a cylinder in the field instead of swapping the whole cylinder body. If you need a full assembly with housing, cam and keys, order a complete mortise cylinder instead.
2) Will a 77B2 keyway plug work in my building if the rest of my Corbin Russwin cylinders are a different keyway?
No. A 77B2 plug only accepts keys cut to the 77B2 keyway, so it will not operate on a different Corbin Russwin section and it will not fold into a master key system built on another keyway. Match the plug to the keyway already running in your facility, or the door ends up on its own key. The 77B2 configuration is what ties this plug into an existing Corbin Russwin keying and master key program.
3) Will this plug fit a rim cylinder or a key-in-lever cylinder?
No. The 606K78 is specified for 2-3/4 inch mortise cylinder applications only. For rim work ZenSupply carries the Schlage 20-021 and 20-022 6-pin rim cylinders with vertical and horizontal tailpiece cams; for key-in-lever, the Falcon A23161-05 G 6-pin cylinder or the Kaba Ilco 1539 universal key-in-knob and lever cylinder.
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 replacement plug for 2-3/4 inch Corbin Russwin mortise cylinders, so it only helps when the existing housing is being kept. If the housing itself is damaged or the opening needs a complete cylinder, the Detex MC65 is a mortise cylinder with a Schlage C keyway, 1-1/8 inch, 6-pin commercial grade, and the Adams Rite 4036 is a Grade 1 mortise cylinder with five-pin security in the 4036 Series. Both are complete cylinders rather than plugs, and neither carries the Corbin Russwin 77B2 keyway, so they key into their own systems.
5) What is the difference between a 7-pin plug like the 606K78 and an interchangeable core such as the BEST 1CDF?
The Corbin Russwin 606K78 is a 7-pin Individual X Class plug that is fitted into an existing 2-3/4 inch mortise cylinder housing, so servicing means rebuilding the cylinder in place. The BEST 1CDF is a drill resistant patented interchangeable core, 7-pin, brass, in the 150 Series 1CDF Series, and the BEST 1CB Peaks is an interchangeable core in the 150 Series as well; an interchangeable core is pulled and swapped with a control key rather than repinned inside the housing. The 606K78 uses the Corbin Russwin 77B2 keyway, while the BEST cores belong to BEST's own core system.
6) Will the 606K78 plug work in a rim cylinder application?
No. The Corbin Russwin 606K78 is built for 2-3/4 inch mortise cylinder housings, and a rim device needs a rim cylinder with a tailpiece cam. For rim applications, the Schlage 20-021 is a 6-pin rim cylinder with a vertical tailpiece cam and two keys, 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. The choice among those depends on the cam orientation the exit device requires.
7) Does the 606K78 plug come in a finish other than satin brass?
Two finishes are offered: 606 Satin Brass and 626 Satin Chrome. Pick the one that matches the visible cylinder face and the lever or lock trim on the rest of the opening, since the plug face is what shows through the collar.
8) Would an interchangeable core be a better choice than re-plugging cylinders every time keying changes?
If your keying changes often, a small format or full size interchangeable core system lets you pull and swap cores with a control key instead of servicing plugs. ZenSupply carries the BEST 1CDF drill resistant 7-pin interchangeable core in the 150 Series and the Schlage 20-057 6-pin FSIC rim cylinder with convertible tailpiece cam. The tradeoff is that those are separate keying platforms, so they do not operate on a Corbin Russwin 77B2 key. The 606K78 plug is the right path when you must stay inside the existing Corbin Russwin system.
9) For a key-in-lever or key-in-knob lock, is the 606K78 the right cylinder part?
No. The Corbin Russwin 606K78 is a mortise cylinder plug for 2-3/4 inch housings. Key-in-lever and key-in-knob locks take their own cylinder format: 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 Series is a universal key-in-knob and lever cylinder. The Kaba Ilco 1599 is a key-in-knob replacement cylinder for that same style of lock.
10) Which cylinder should be used for a deadbolt rather than the 606K78?
The Corbin Russwin 606K78 is a plug for commercial 2-3/4 inch mortise cylinders, not a deadbolt cylinder. For deadbolt openings, the Kaba Ilco 1549 Series is a key-in-deadbolt cylinder with a deadbolt product function, and 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 specifically for Kwikset single cylinder deadbolts, so the correct pick depends on the deadbolt brand already in the door.
11) Is a 5-pin core an acceptable substitute for the 7-pin 606K78 plug?
They are different pin counts and belong to different systems. The Corbin Russwin 606K78 is a 7-pin Individual X Class plug keyed to the 77B2 keyway, which supports master key programs with the deeper pin stack. The BEST 1C5 is a standard 5-pin cylinder core in BEST's Standard and Premium Cores line. A 5-pin core will not carry a 7-pin Corbin Russwin keying schedule, so substituting one changes the keying system rather than just the part.
12) For an aluminum storefront door with an Adams Rite deadlock, what takes the place of the 606K78?
The Corbin Russwin 606K78 is a plug for Corbin Russwin 2-3/4 inch mortise cylinders and is not a storefront pull part. On an Adams Rite MS1847 deadlock or deadlatch, the 4024 cylinder pull mounts with a trim plate and the 4025 is a five pin tumbler cylinder pull that mounts with through-screws. For a wood door, the Adams Rite 4026 five pin tumbler cylinder pull is made for the 5017 wood door deadlock or deadlatch.
13) Is this plug rated for heavy commercial traffic, or is it a residential part?
Commercial. The 606K78 plug is part of Corbin Russwin's commercial cylinder line and is used in offices, schools, healthcare, government buildings, multi-tenant residential, retail and hospitality, and industrial facilities. It is not a residential-grade part.
14) Is the Corbin Russwin 606K78 a genuine OEM part or an aftermarket copy?
Genuine Corbin Russwin, manufactured to OEM specifications, which is why it holds the tolerances needed to drop into a Corbin Russwin mortise cylinder assembly and turn freely in the housing. Product model is listed as 606K78 77B2.
15) What if the opening needs a cylinder that looks keyed but does not operate anything?
The Corbin Russwin 606K78 is a functioning 7-pin plug for a 2-3/4 inch mortise cylinder. Where only the appearance of a cylinder is wanted, the BEST 12E Series dummy rim cylinder with a 1-5/32 inch diameter fills the prep without operating hardware. Note that it is a rim format, so it does not drop into a mortise housing the way the 606K78 does.
16) Between the Schlage 20-057 and the 20-057-C, does either relate to the 606K78's keying?
Neither shares the Corbin Russwin 77B2 keyway that the 606K78 uses. The Schlage 20-057 is a 6-pin FSIC rim cylinder with a convertible tailpiece cam and two keys, and the 20-057-C is a full size interchangeable core cylinder with the C keyway in 643E Aged Bronze. Both are Schlage FSIC cores, so they are keyed into a Schlage system rather than a Corbin Russwin one.
17) Does the 606K78 finish selection matter when matching other cylinders on a door?
The Corbin Russwin 606K78 plug is offered in 606 Satin Brass and 626 Satin Chrome, so the exposed plug face can be matched to the surrounding trim. Peer cylinders publish their own finishes separately; the Schlage 20-057-C, for example, is a C keyway core in 643E Aged Bronze, which reads darker than either 606K78 option.
18) For a Sargent knob or lever lock, is the 606K78 a fit?
No. The Corbin Russwin 606K78 is a 77B2 keyway plug for Corbin Russwin 2-3/4 inch mortise cylinders. For a Sargent knob or lever, the Kaba Ilco 1579 Series knob and lever cylinder is built for Sargent, with a deadbolt product function listed for the series.
19) What cylinder suits an Emtek handleset instead of the 606K78?
The Corbin Russwin 606K78 is a commercial mortise cylinder plug and does not serve residential-style handlesets. For Emtek, the Medeco 1065244 is a 5-pin rim lazy motion rim type cylinder supplied with an Emtek tailpiece, the Medeco 1065140 is a 5-pin retrofit cylinder for Arrow JL interconnected locks and Emtek handleset and deadbolt outside cylinders, and the Emtek CY4 cylinder is sold each as an Emtek part.
How fast can I get the Corbin Russwin 606K78 77B2 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 77B2 626 come with a warranty?
Absolutely. The Corbin Russwin 606K78 77B2 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 77B2 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
Why buy the Corbin Russwin 606K78 77B2 626 from ZenSupply?
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