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 57B2 Keyway

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Model: 606K78 57B2 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 57B2 Keyway

The Corbin Russwin 606K78 is a 7-Pin Individual X Class Cylinder Plug engineered specifically for 2-3/4" mortise lock applications. Featuring the 57B2 keyway and a Satin Brass finish, this replacement cylinder plug is a genuine Corbin Russwin cylinder part designed to integrate seamlessly into compatible mortise lock cylinders. Built to commercial standards, this plug provides reliable keying performance for facilities requiring precise key control within the Corbin Russwin keying system.

Key Features

  • 7-Pin Configuration: Individual X Class plug with a 7-pin tumbler arrangement for enhanced key control and security in commercial mortise lock applications.
  • Mortise Compatibility: Designed specifically for 2-3/4" mortise lock cylinders, ensuring a precise and secure fit in compatible Corbin Russwin hardware.
  • 57B2 Keyway: Features the 57B2 keyway profile for integration into Corbin Russwin keying systems, supporting master key and grand master key configurations.
  • Satin Brass Finish: Satin Brass finish provides a professional, durable appearance consistent with coordinated commercial door hardware installations.
  • Genuine Corbin Russwin Cylinder Part: Manufactured as an authentic Corbin Russwin cylinder component, ensuring compatibility and performance consistent with original equipment standards.
  • Commercial-Grade Construction: Engineered to meet the demands of commercial facilities where reliable, consistent cylinder operation is essential.
  • Replacement Part Application: Ideal for service, re-keying, or replacement scenarios in existing Corbin Russwin 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 57B2
  • Features: Corbin Russwin Cylinder Parts

Typical Applications

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

Why Corbin Russwin 606K78?

Corbin Russwin cylinder parts are manufactured to precise tolerances to ensure reliable integration with existing mortise lock hardware. The 606K78 7-Pin Individual X Class Plug delivers consistent key control performance within the Corbin Russwin keying system, making it a dependable choice for locksmiths, facility managers, and security professionals servicing or upgrading commercial door hardware installations.

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 57B2
Features:
Corbin Russwin Cylinder Parts

Corbin Russwin 606K78 57B2 626 – Frequently Asked Questions

1) What does the 57B2 keyway mean for keying this into an existing master key system?
57B2 is a Corbin Russwin keyway profile, and the plug is meant to be keyed into an existing Corbin Russwin system, including master and grand master key setups. For a facility standardizing key control, that means service or re-key work stays inside the same hierarchy rather than creating a separate key. Your keys and your system records need to be on 57B2 for this plug to be the right one.
2) If I need a complete mortise cylinder rather than just a replacement plug, what should I order instead of the Corbin Russwin 606K78?
The Corbin Russwin 606K78 is a 7-pin Individual X Class cylinder plug for 2-3/4 inch mortise locks - it is the keyed plug component, not a whole cylinder body. When the job calls for a complete mortise cylinder, the Detex MC65 is a mortise cylinder with a Schlage C keyway, 1-1/8 inch, 6-pin, and the Adams Rite 4036 is a Grade 1 mortise cylinder with five-pin security in the 4036 Series. Both are assembled cylinders you install in the lock case, whereas the 606K78 goes into a compatible Corbin Russwin cylinder.
3) The cylinder I am replacing is in a key-in-lever lockset, not a mortise lock. Does the 606K78 fit?
No - the 606K78 is built for 2-3/4 inch mortise lock cylinders. Key-in-knob and key-in-lever locksets take a different cylinder format. The Kaba Ilco 1539 Series is a key-in-knob/lever universal cylinder, the 1579 is a knob and lever cylinder for Sargent, 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, supplied with two cut keys.
4) Is a BEST interchangeable core the same thing as the Corbin Russwin 606K78 plug?
No. The 606K78 is a 7-pin cylinder plug that drops into a compatible Corbin Russwin 2-3/4 inch mortise cylinder with the 57B2 keyway. A BEST interchangeable core is a removable core that seats in a core-ready housing - the BEST 1C Series is a standard 5-pin cylinder core, the 1CB is a 150 Series interchangeable core, and the 1CDF is a drill-resistant patented interchangeable core with 7 pins in brass. The two are different keying architectures and do not interchange.
5) What should I use if the opening needs a rim cylinder instead of a mortise plug?
The 606K78 serves 2-3/4 inch mortise lock cylinders only. For rim applications, the Schlage 20-021 is a 6-pin rim cylinder with a vertical tailpiece cam and two keys, and the 20-022 is the same 6-pin rim cylinder with a horizontal tailpiece cam. Pick the cam orientation the exit device or rim lock requires. The Schlage 20-057 is a 6-pin FSIC rim cylinder with a convertible tailpiece cam if the facility runs full-size interchangeable cores.
6) Why choose a 7-pin plug over a 6-pin for a commercial building?
The extra pin chamber expands the number of usable key combinations, which matters when a system has to carry master and grand master levels across a lot of doors without duplicate cuts. The 606K78 is a 7-pin Individual X Class plug intended for commercial use. If you're servicing a 6-pin system instead, a 7-pin plug is the wrong part; comparable 6-pin commercial cylinders include the Detex MC65 in Schlage C and the Schlage 20-021 rim cylinder.
7) What finishes does the 606K78 come in, and does it need to match my other door hardware?
Two finishes: 606 Satin Brass and 626 Satin Chrome. Pick the one that matches the mortise cylinder ring and the rest of the trim on the opening, since the plug face is the visible part once the key is out. 626 Satin Chrome is the usual pairing with brushed chrome or satin stainless lever trim; 606 Satin Brass goes with brass-toned openings.
8) I manage a portfolio and want to stop re-keying whole cylinders. Is a plug the cheaper service route, or should I go interchangeable core?
Replacing the plug lets you re-key or re-pin a door without pulling and replacing the whole mortise cylinder, which is why the 606K78 is stocked as a service and replacement item. If you'd rather swap keying in seconds without any pinning work at all, an interchangeable core platform is the alternative, for example the BEST 1CB 150 Series interchangeable core or the BEST 1CDF drill-resistant 7-pin core. Those require core-compatible housings, so it's a system decision, not a part-for-part swap.
9) What is the exact model designation I should quote when ordering the Corbin Russwin plug?
Order as Corbin Russwin 606K78 with the 57B2 keyway, and state the finish, either 606 Satin Brass or 626 Satin Chrome. Distributors should note the model is carried as 606K78 57B2, so the keyway is part of the identity of the part, not an option you add later.
10) I have an aluminum storefront with an Adams Rite deadlock. What cylinder hardware goes there rather than the 606K78?
The 606K78 is a Corbin Russwin mortise cylinder plug and is not a storefront pull. 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 that mounts with through-screws. For a wood door, the 4026 five pin tumbler cylinder pull is made for the Adams Rite 5017 wood door deadlock/deadlatch.
11) For a residential-style deadbolt or handleset retrofit, is the 606K78 the right cylinder?
No. The 606K78 is a commercial Corbin Russwin mortise plug. Deadbolt and handleset retrofits are served by rim-type lazy motion cylinders: the Medeco 1012040 is a 6-pin lazy motion rim cylinder for Kwikset single cylinder deadbolts, the 1075127 is a 5-pin rim type lazy motion single cylinder for handlesets and deadbolts, the 1065244 is a 5-pin rim lazy motion cylinder with an Emtek tailpiece, and the 1065140 is a 5-pin retrofit cylinder for the Arrow JL interconnected lock and Emtek handleset and deadbolt outside cylinder. Emtek's own CY4 cylinder is sold each.
12) I need a non-keyed filler for an unused cylinder hole. Can I order the 606K78 unkeyed?
The 606K78 is a keyed 7-pin plug intended for service, re-keying, or replacement in existing Corbin Russwin mortise installations, so it is not a blank filler. For a non-operating position, the BEST 12E Series dummy rim cylinder with a 1-5/32 inch diameter is the dummy option in the set.
13) How does the 606K78 differ from a full-size interchangeable core cylinder if I want a facility I can re-key without pulling hardware?
Re-keying with the 606K78 means swapping the 7-pin Individual X Class plug inside the Corbin Russwin 2-3/4 inch mortise cylinder, which keeps the keying inside the Corbin Russwin 57B2 system. A full-size interchangeable core approach uses a removable core instead: the Schlage 20-057 is a 6-pin FSIC rim cylinder with a convertible tailpiece cam, and the 20-057-C is a full size interchangeable core cylinder in the C keyway, finished 643E Aged Bronze.
14) My deadbolt cylinder failed on a multi-tenant door. Does the 606K78 cover that?
The 606K78 is a mortise cylinder plug for 2-3/4 inch Corbin Russwin mortise locks, so it applies only where a mortise cylinder is in the door. For a deadbolt cylinder, the Kaba Ilco 1549 Series is a key-in-deadbolt cylinder, and the 1539, 1579 and 1599 Series cylinders are also listed for deadbolt function.
15) Is the 606K78 suitable for a hospital or school where doors get constant key use?
It's specified as a commercial component and is used in healthcare, educational, government, multi-tenant residential, retail, and industrial facilities. The draw for those buyers is key control: a 7-pin Corbin Russwin plug keyed to 57B2 keeps a large facility's master keying consistent as doors are serviced.
16) Which cylinder options come with keys, and does the 606K78 plug?
The 606K78 is a replacement cylinder plug for keying into an existing Corbin Russwin 57B2 system, so it is handled by your keying source rather than shipped as a keyed set. If you need a cylinder that arrives with keys, the Schlage 20-021 and 20-022 6-pin rim cylinders each include 2 keys, the Schlage 20-057 FSIC rim cylinder includes 2 keys, and the Falcon A23161-05 G key-in-lever cylinder is keyed different with 2 cut keys.
How fast can I get the Corbin Russwin 606K78 57B2 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 57B2 626 come with a warranty?
Absolutely. The Corbin Russwin 606K78 57B2 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 57B2 626?
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