Corbin Russwin 606K76 7-Pin In...
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Corbin Russwin 606K76 7-Pin Individual X Class Cylinder Plug for 2-1/4" Mortise with 77A1 Keyway

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Model: 606K76 77A1 626

In Stock (leaves warehouse same day if ordered before 3pm ET)

$94.00
$81.02
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Corbin Russwin 606K76 7-Pin Individual X Class Cylinder Plug for 2-1/4" Mortise with 77A1 Keyway

The Corbin Russwin 606K76 is a 7-Pin Individual X Class cylinder plug engineered specifically for 2-1/4" mortise applications and keyed to the 77A1 keyway. Finished in Satin Brass, this commercial-grade replacement cylinder plug is designed to integrate seamlessly with compatible Corbin Russwin mortise cylinder hardware, delivering reliable pin-tumbler security and precise key control for professional locksmithing and facilities maintenance applications.

Key Features

  • 7-Pin Configuration: Individual X Class plug with seven-pin tumbler design provides enhanced key control and security for commercial mortise cylinder applications.
  • Mortise Compatibility: Engineered for 2-1/4" mortise cylinders, ensuring precise fit and reliable operation in compatible Corbin Russwin hardware.
  • 77A1 Keyway: Keyed to the proprietary 77A1 keyway for controlled key duplication and system security integrity.
  • Satin Brass Finish: Satin Brass finish provides a professional aesthetic and corrosion-resistant surface suitable for commercial door applications.
  • X Class Security: Individual X Class designation indicates a controlled, restricted keyway class designed for high-security master key systems.
  • Commercial-Grade Construction: Manufactured as an authentic Corbin Russwin cylinder part, meeting the quality standards required for commercial mechanical lock systems.
  • Replacement Part: Designed as a direct replacement component for existing Corbin Russwin mortise cylinder assemblies, simplifying maintenance and re-keying operations.

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: 606K76 77A1
  • Features: Corbin Russwin Cylinder Parts

Typical Applications

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

Why Corbin Russwin 606K76?

Corbin Russwin cylinder parts are manufactured to exacting commercial standards, ensuring seamless compatibility and dependable performance within Corbin Russwin mortise cylinder systems. The 606K76 Individual X Class plug delivers the precision key control and pin-tumbler security that professional locksmiths and facilities managers rely on for high-traffic commercial environments. Engineered as an authentic replacement part, it maintains the integrity of existing master key systems without compromise.

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:
606K76 77A1
Features:
Corbin Russwin Cylinder Parts

Corbin Russwin 606K76 77A1 626 – Frequently Asked Questions

1) Will a 77A1 keyway plug work in my existing Corbin Russwin master key system?
Only if your system is already on the 77A1 keyway. The 606K76 is cut to the proprietary, restricted 77A1 keyway, which is what keeps duplication controlled; a plug on a different Corbin Russwin keyway will not accept your 77A1 keys and vice versa. Pull an existing key or your keying schedule and confirm the keyway stamp before you order, because the plug is a direct replacement component only inside a 77A1 system.
2) Does the 606K76 fit a 1-1/8 inch mortise cylinder?
No. This plug is built for 2-1/4 inch Corbin Russwin mortise cylinders, so it will not go into a 1-1/8 inch shell. A 2-1/4 inch mortise cylinder is a long-length cylinder typically used where the lock case sits deep or the trim is thick, and the plug length is specific to it. If your lock uses a standard 1-1/8 inch cylinder, order a plug or cylinder sized for that instead.
3) I need to re-key a few doors without replacing the locks. Is this the right part to order?
Yes, that's exactly the use case. Swapping the plug re-keys the opening while leaving the mortise cylinder shell, lock case and trim in place, so there's no drilling and no new prep. It suits a facilities crew re-keying after tenant turnover or a lost-key event on 2-1/4 inch Corbin Russwin mortise cylinders keyed 77A1. If you would rather pull and replace a core without a locksmith at all, an interchangeable-core system such as the BEST 1CDF 7-pin core works differently, but it requires BEST IC housings, not Corbin Russwin mortise shells.
4) I need a complete mortise cylinder, not just a plug. What should I order instead of the Corbin Russwin 606K76?
The 606K76 is a cylinder plug sold as a replacement part for existing Corbin Russwin mortise cylinder assemblies, so it will not fill an empty mortise prep on its own. For a complete mortise cylinder, the Adams Rite 4036 is a Grade 1 mortise cylinder with five-pin security, and the Detex MC65 is a 1-1/8 inch six-pin mortise cylinder cut to the Schlage C keyway. Note the 606K76 is built for 2-1/4 inch mortise applications, so confirm the cylinder length your prep requires before switching.
5) Is the Corbin Russwin 606K76 plug the same thing as an interchangeable core?
No. The 606K76 is a 7-pin Individual X Class plug that goes into an existing Corbin Russwin mortise cylinder, so re-keying means working the cylinder itself. An interchangeable core is pulled and swapped with a control key instead: the BEST 1CB is a 150 Series interchangeable core cylinder, the BEST 1CDF is a drill resistant patented 7-pin brass interchangeable core in the 150 Series, and the Schlage 20-057-C is a full size interchangeable core in the C keyway. Those are different housing systems, not drop-in alternatives to a plug.
6) My exit device takes a rim cylinder. Does the Corbin Russwin 606K76 work there?
No. The 606K76 is built for 2-1/4 inch mortise cylinder applications, which is a threaded mortise housing rather than a rim mount. For rim applications, the Schlage 20-021 is a 6-pin rim cylinder with a vertical tailpiece cam and the 20-022 is the same 6-pin rim cylinder with a horizontal cam; the Schlage 20-057 is a 6-pin FSIC rim cylinder with a convertible tailpiece cam. Match the cam orientation to the device.
7) I am replacing the cylinder in a key-in-lever or key-in-knob lockset. Is the 606K76 the right part?
The 606K76 is a mortise cylinder plug for Corbin Russwin mortise cylinder assemblies, not a key-in-lever unit. For key-in-knob and key-in-lever work, the Kaba Ilco 1539 is a key-in-knob/lever universal cylinder, the 1599 is a key-in-knob replacement cylinder, the 1579 fits Sargent knobs and levers, and the Falcon A23161-05 G is a key-in-lever cylinder in the RU/T Series 6-pin G keyway, keyed different with two cut keys.
8) What finishes does the 606K76 cylinder plug come 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 part visible at the keyway. For a building standardized on brass hardware, take 606; for chrome or brushed nickel openings, 626 is the closer match.
9) Why choose a 7-pin plug instead of a 6-pin for a commercial building?
Seven pins give you more usable key changes and a deeper masterkey hierarchy, which is why the 606K76 is used on X Class restricted systems in offices, schools, hospitals and government buildings. It's a commercial part, and the pin count has to match the rest of your system: a 7-pin plug belongs in a 7-pin Corbin Russwin system. If your facility runs 6-pin cylinders, a 6-pin option like the Schlage 20-021 rim cylinder or the Detex MC65 mortise cylinder is the matching pin count, though on their own keyways.
10) What is the ordering model number for the Corbin Russwin satin brass 7-pin X Class plug?
Order it as 606K76 77A1: 606K76 is the plug, and 77A1 designates the restricted keyway. Finish is chosen separately, either 606 Satin Brass or 626 Satin Chrome. Note the 606 in the model number refers to the part series, not the finish, so spell out the finish on the purchase order to avoid a mismatch.
11) Can I use this plug in a rim cylinder or a key-in-lever cylinder?
No. The 606K76 plug is dimensioned for 2-1/4 inch mortise cylinders, so it won't serve a rim or key-in-lever housing. For rim applications the Schlage 20-021 (vertical tailpiece cam) and 20-022 (horizontal tailpiece cam) are 6-pin rim cylinders, and for key-in-lever work the Falcon A23161-05 G is a 6-pin G keyway lever cylinder and the Kaba Ilco 1539 is a universal key-in-knob/lever cylinder.
12) What is the closest 7-pin alternative to the Corbin Russwin 606K76 if I am not tied to the 77A1 keyway?
The 606K76 is keyed to the proprietary 77A1 keyway for restricted duplication, which is the reason to stay with it inside an existing Corbin Russwin system. If the system is not tied to 77A1, the BEST 1CDF is also a 7-pin design, offered as a drill resistant patented interchangeable core in brass. Five-pin options in the set include the BEST 1C5 standard cylinder core and the Adams Rite 4036 mortise cylinder.
13) What should I use instead of the 606K76 for a deadbolt or handleset cylinder?
The 606K76 is a commercial mortise cylinder plug and is not a deadbolt part. For deadbolt and handleset cylinders, 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, the Medeco 1075127 is a 5-pin rim type lazy motion single cylinder for handlesets and deadbolts, and the Medeco 1065140 is a 5-pin retrofit cylinder for Arrow JL interconnected locks and Emtek handleset and deadbolt outside cylinders.
14) For an aluminum storefront with an Adams Rite deadlock, would the Corbin Russwin 606K76 be the cylinder to order?
The 606K76 is a plug for Corbin Russwin mortise cylinder assemblies, so it is not a storefront cylinder pull package. For Adams Rite MS1847 deadlock and deadlatch systems, the 4024 is a cylinder pull with trim plate mounting and the 4025 is a five pin tumbler cylinder pull with through-screws; the 4026 five pin tumbler cylinder pull is for wood door applications with the Adams Rite 5017 wood door deadlock. The Adams Rite 4036 is a Grade 1 mortise cylinder with a 1/2 inch minimum door thickness.
15) I only need to fill a cylinder hole with no key function. Is the 606K76 right?
No. The 606K76 is a keyed 7-pin Individual X Class plug intended to keep an existing Corbin Russwin master key system intact. Where no key operation is wanted, the BEST 12E Series dummy rim cylinder with a 1-5/32 inch diameter covers the opening as a non-functioning cylinder.
How fast can I get the Corbin Russwin 606K76 77A1 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 606K76 77A1 626 come with a warranty?
Absolutely. The Corbin Russwin 606K76 77A1 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 606K76 77A1 626?
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