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 57A2 Keyway

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Model: 606K78 57A2 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 57A2 Keyway

The Corbin Russwin 606K78 is a 7-Pin Individual X Class replacement cylinder plug engineered for use with 2-3/4" mortise cylinders and featuring the 57A2 keyway. Finished in Satin Brass, this commercial-grade cylinder part is designed as a precision replacement component for Corbin Russwin mortise lock systems, ensuring accurate key compatibility and reliable security performance in demanding commercial environments.

Key Features

  • 7-Pin Configuration: Individual X Class plug with a 7-pin design for enhanced key control and security performance in commercial mortise applications.
  • Mortise Compatibility: Specifically engineered for 2-3/4" mortise cylinders, ensuring precise fit and proper function within compatible Corbin Russwin lock assemblies.
  • 57A2 Keyway: Features the 57A2 keyway profile for accurate key compatibility and controlled key duplication within the Corbin Russwin keying system.
  • X Class Plug: Individual X Class designation supports organized master key system integration and professional keying flexibility for commercial facilities.
  • Satin Brass Finish: Corrosion-resistant Satin Brass finish provides a professional aesthetic and durable surface treatment suitable for commercial door hardware applications.
  • OEM Replacement Part: Genuine Corbin Russwin cylinder component designed as a direct replacement part, maintaining original performance specifications and system integrity.

Certifications & Compliance

  • Commercial Grade, Rated for Commercial Applications
  • Genuine Corbin Russwin Cylinder Parts

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 57A2
  • Features: Corbin Russwin Cylinder Parts

Typical Applications

  • Commercial Office Buildings with Mortise Lock Systems
  • Educational Facilities Requiring Keyed Cylinder Replacement
  • Healthcare Institutions with Master Key Systems
  • Government and Municipal Buildings
  • Retail Establishments with Commercial Mortise Hardware
  • Multi-Tenant Residential and Mixed-Use Properties
  • Industrial and Warehouse Facilities with Access Control Requirements

Why Corbin Russwin 606K78?

Corbin Russwin cylinder parts are manufactured to exacting OEM standards, ensuring that replacement plugs like the 606K78 maintain full compatibility with existing mortise lock assemblies and keying systems. The 7-pin X Class design delivers professional-grade key control suited to the security demands of commercial facilities where system integrity and reliable access management are essential.

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 57A2
Features:
Corbin Russwin Cylinder Parts

Corbin Russwin 606K78 57A2 626 – Frequently Asked Questions

1) What does the 57A2 keyway mean for keying my building?
57A2 is the Corbin Russwin keyway section the plug is cut for, so keys on your existing 57A2 system will operate it once it's pinned to your combination. Ordering a plug on any other keyway means new keys for that door. The 7-pin Individual X Class design is intended for master key system work where key control matters, which is why locksmiths use it for schools, hospitals and office portfolios standardizing on one Corbin Russwin system.
2) Can I use this plug in a rim cylinder or a key-in-lever cylinder?
No. It's dimensioned for 2-3/4 inch mortise cylinders. Rim and key-in-lever housings use different plug lengths and tailpiece arrangements, so this won't seat. For rim work, the Schlage 20-021 and 20-022 are 6-pin rim cylinders (vertical and horizontal tailpiece cams). For key-in-knob or lever replacement, the Kaba Ilco 1539 and 1599 universal cylinders cover those housings.
3) What should I use instead of the 606K78 if the facility is standardizing on interchangeable cores rather than keyed plugs?
The 606K78 is a fixed 7-pin plug tied to the 57A2 keyway, so rekeying means working the plug. For an interchangeable-core approach, BEST offers the 1CB 150 Series interchangeable core cylinder and the 1CDF drill resistant patented interchangeable core 7-pin brass 150 Series core; Schlage's 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 C keyway, 643E Aged Bronze.
4) Will a rim cylinder work in place of the 606K78 mortise plug?
No. The 606K78 plug is built for 2-3/4 inch mortise cylinders, which thread into the lock case. Rim cylinders such as the Schlage 20-021 (6-pin, vertical tailpiece cam) and 20-022 (6-pin, horizontal tailpiece cam) mount through the door and drive a tailpiece, and the BEST 12E Series is a dummy rim cylinder of 1-5/32 inch diameter. Those are rim applications, not mortise.
5) For an aluminum storefront deadlock, is the 606K78 the right cylinder part?
The 606K78 is a mortise cylinder plug for Corbin Russwin commercial mortise lock assemblies. Storefront deadlock work is served by Adams Rite cylinder pulls: the 4024 with trim plate mounting and the 4025 five pin tumbler with through-screws, both for the MS1847 deadlock/deadlatch, and the 4026 five pin tumbler cylinder pull for the 5017 wood door deadlock/deadlatch.
6) I need a cylinder, not a plug, for a mortise lock on another brand. What else is there?
If you want a complete mortise cylinder rather than a Corbin Russwin plug, the Detex MC65 is a 1-1/8 inch 6-pin commercial mortise cylinder on the Schlage C keyway, and the Adams Rite 4036 is a Grade 1 five-pin mortise cylinder. Neither works on a Corbin Russwin 57A2 system, so they're for openings you're keying separately or on a Schlage C master key system.
7) Would an interchangeable core be easier to maintain than replacing plugs?
If you're swapping keying often, a small format or full size interchangeable core system pulls the core with a control key instead of tearing down the cylinder. The BEST 1CB 150 Series core and the 1CDF drill-resistant 7-pin brass core cover that approach, and Schlage's 20-057 is a 6-pin FSIC rim cylinder. The tradeoff: those are separate keying systems, so they won't operate on your Corbin Russwin 57A2 keys. The 606K78 plug is the right call when you're keeping the existing mortise cylinders and the existing system.
8) Does the 606K78 plug come with keys?
The 606K78 is sold as a replacement cylinder plug for mortise cylinders. Plan on having your keys cut to your existing 57A2 system, and have the plug pinned to the combination you need. If you want a cylinder that ships with cut keys, look at complete cylinder assemblies instead, such as the Schlage 20-021 rim cylinder, which is listed with 2 keys.
9) Is there a simpler 5-pin option than the 7-pin 606K78 plug?
The 606K78 is a 7-pin Individual X Class plug for the 57A2 keyway. Lower pin counts exist in other cylinder types: the BEST 1C Series is a standard 5-pin cylinder core, and the Adams Rite 4036 mortise cylinder is a five-pin Grade 1 unit. Note those are cores and complete cylinders rather than mortise plugs, so they change what you are installing, not just the pinning.
10) I need a cylinder for a key-in-lever lock, not a mortise case - what is the alternative to the 606K78?
The 606K78 serves 2-3/4 inch mortise cylinders. For key-in-knob and key-in-lever bodies, the Falcon A23161-05 G is a key-in-lever cylinder in the RU/T Series with a 6-pin G keyway keyed different and two cut keys, and Kaba Ilco offers the 1539 Series key-in-knob/lever universal cylinder, the 1579 knob and lever cylinder for Sargent, and the 1599 key-in-knob replacement cylinder.
11) Can I use the 606K78 to rekey a residential deadbolt or handleset?
No - it is a commercial mortise cylinder plug with the 57A2 keyway. Residential deadbolt and handleset retrofits are handled by Medeco rim-type cylinders: the 1012040 6-pin lazy motion rim cylinder for Kwikset single cylinder deadbolts, the 1065140 5-pin retrofit for Arrow JL interconnected locks and Emtek handleset/deadbolt outside cylinder, the 1065244 5-pin lazy motion rim cylinder with Emtek tailpiece, and the 1075127 5-pin lazy motion single cylinder for handlesets and deadbolts. Emtek also lists the CY4 cylinder as a part.
12) If key control and drill resistance are the priority, what compares to the 7-pin X Class 606K78?
The 606K78 uses a 7-pin Individual X Class plug on the 57A2 keyway for controlled key duplication within the Corbin Russwin system. On the same pin count, the BEST 1CDF is a drill resistant preferred patented interchangeable core 7-pin brass core in the 150 Series, which combines patented key control with a drill resistant core rather than a mortise plug.
13) Is a deadbolt cylinder like the Kaba Ilco 1549 a substitute for the 606K78?
No. The Kaba Ilco 1549 Series is a key-in-deadbolt cylinder with a deadbolt product function, as is the 1549's sibling 1539 Series. The 606K78 is a replacement plug for 2-3/4 inch Corbin Russwin mortise cylinders with the 57A2 keyway, so it serves a mortise lock case rather than a deadbolt body.
14) What finishes does the Corbin Russwin 606K78 plug come in?
Two: 606 Satin Brass and 626 Satin Chrome. Pick the one matching the existing cylinder face and the trim on the door, since the plug face is visible in the keyhole. Satin Chrome is the usual choice alongside 626 lever and exit hardware; Satin Brass matches 606 trim.
15) Is this plug rated for commercial use or is it a residential part?
Commercial. The 606K78 is classed as a commercial cylinder part for Corbin Russwin mortise lock systems, and it shows up in office buildings, schools, healthcare, government facilities, retail and multi-tenant residential where mortise hardware is already installed.
16) Why choose a 7-pin plug over a 6-pin for a commercial master key system?
More pin chambers means more usable key changes and tighter control over duplication, which matters when one master key system covers a whole campus or portfolio. The 606K78 is a 7-pin Individual X Class plug built for that kind of hierarchy. Six-pin cylinders like the Detex MC65 are common on smaller systems where you don't need the extra levels.
17) The 606K78 comes in Satin Brass and Satin Chrome - what finishes do comparable cylinders offer?
The 606K78 plug is offered in 606 Satin Brass and 626 Satin Chrome. Among comparable cylinders, the Schlage 20-057-C full size interchangeable core is listed in 643E Aged Bronze, a darker tone if the surrounding trim is bronze rather than brass or chrome.
How fast can I get the Corbin Russwin 606K78 57A2 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 57A2 626 come with a warranty?
Absolutely. The Corbin Russwin 606K78 57A2 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 57A2 626?
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