Corbin Russwin 487K21 7-Pin X ...
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Corbin Russwin 487K21 7-Pin X Class Mortise Cylinder Plug, 2" with 27A2 Keyway in Satin Brass

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Model: 487K21 27A2 626

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

$94.00
$81.02
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Corbin Russwin 487K21 7-Pin X Class Mortise Cylinder Plug, 2" with 27A2 Keyway in Satin Brass

The Corbin Russwin 487K21 is a 7-Pin X Class replacement plug designed for 2" mortise cylinder applications. Featuring the 27A2 keyway and a Satin Brass finish, this commercial-grade cylinder component is engineered as a direct replacement part for compatible Corbin Russwin mortise lock cylinders. Designed for commercial door hardware installations where precise key control and reliable cylinder performance are essential.

Key Features

  • 7-Pin X Class Configuration: Provides enhanced key control and security through a 7-pin tumbler arrangement in the X Class classification for commercial applications.
  • 2" Mortise Cylinder Format: Designed specifically for 2" mortise cylinder housings, ensuring precise fitment and reliable operation within compatible Corbin Russwin mortise locks.
  • 27A2 Keyway: Features the 27A2 keyway profile for controlled key duplication and system compatibility within Corbin Russwin keying systems.
  • Satin Brass Finish: Finished in Satin Brass for a professional appearance that coordinates with a wide range of commercial door hardware finishes.
  • Commercial-Grade Replacement Part: Manufactured as an authentic Corbin Russwin cylinder part for reliable, like-for-like replacement in commercial mechanical lock applications.
  • Corbin Russwin Cylinder Compatibility: Engineered specifically for use within the Corbin Russwin cylinder parts ecosystem, maintaining original performance standards.

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: 487K21 27A2
  • 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 487K21?

Corbin Russwin cylinder replacement parts are manufactured to meet the exacting standards of commercial door hardware professionals. The 487K21 plug delivers authentic fitment and performance within Corbin Russwin mortise cylinder assemblies, making it a dependable choice for maintenance, rekeying, and replacement projects in demanding commercial environments where reliable access control is critical.

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:
487K21 27A2
Features:
Corbin Russwin Cylinder Parts

Corbin Russwin 487K21 27A2 626 – Frequently Asked Questions

1) What keyway does the 487K21 plug come in, and will it work in my existing Corbin Russwin key system?
The 27A2 keyway. That's a Corbin Russwin profile, so the plug keys into an existing Corbin Russwin system only if that system is built on 27A2. A plug cut for one keyway won't accept keys from another, so match the keyway stamped on the cylinder you're servicing before you order.
2) I have 6-pin Corbin Russwin cylinders, can I use this 7-pin plug?
No. The 487K21 is a 7-pin X Class plug and it belongs in a 7-pin X Class 2 inch mortise cylinder. A 6-pin housing has different chamber count and depth, so the plug won't drop in or pin up correctly. Order the plug that matches the pin count of the cylinder you're rebuilding.
3) If I need a complete mortise cylinder rather than just a replacement plug, what should I order instead of the Corbin Russwin 487K21?
The Corbin Russwin 487K21 27A2 is a replacement plug for 2 inch mortise cylinder applications, so it assumes the cylinder shell is already in the door and serviceable. When the whole cylinder has to be replaced, a complete mortise cylinder is the right part: 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. Those are whole cylinders, not plugs, and they do not carry the Corbin Russwin 27A2 keyway, so they will not key into an existing 27A2 system.
4) Is a BEST 1CDF interchangeable core a substitute for the Corbin Russwin 487K21 plug?
No. The BEST 1CDF is a drill resistant patented interchangeable core, 7-pin, brass, in the 150 series - it drops into a BEST-style figure-eight core housing and is removed with a control key. The Corbin Russwin 487K21 is a 7-Pin X Class plug for 2 inch Corbin Russwin mortise cylinders with the 27A2 keyway, which is serviced as a cylinder component rather than swapped as a core. Both are 7-pin, but the housings and keyways are different systems.
5) My door uses a rim exit device, not a mortise lock. Does the 487K21 fit?
No. The Corbin Russwin 487K21 is built for 2 inch mortise cylinder housings. Rim devices take a rim cylinder: the Schlage 20-021 is a 6-pin rim cylinder with a vertical tailpiece cam, the 20-022 is the same 6-pin rim cylinder with a horizontal tailpiece cam, and the Schlage 20-057 is a 6-pin FSIC rim cylinder with a convertible tailpiece cam. Choose among those by the cam orientation the device requires.
6) What finishes is the Corbin Russwin 487K21 plug available in?
Two: 606 Satin Brass and 626 Satin Chrome. Pick the one that matches the cylinder collar and the rest of the trim on the door, since the plug face is the visible part once it's installed.
7) I need a whole mortise cylinder, not a plug, what else do you carry?
Look at complete mortise cylinders rather than plugs. The Adams Rite 4036 is a Grade 1 five-pin mortise cylinder rated for 1/2 inch minimum door thickness, and the Detex MC65 is a 1-1/8 inch six-pin mortise cylinder in the Schlage C keyway. Neither carries the Corbin Russwin 27A2 keyway, so they suit a new or standalone opening rather than one keyed into an existing Corbin Russwin system.
8) Will this Corbin Russwin plug fit a rim cylinder or an exit device cylinder?
No. It's built for 2 inch mortise cylinder housings, which thread into the lock case. Rim cylinders are a different body with a tailpiece, so for those look at parts like the Schlage 20-021 rim cylinder with a vertical tailpiece cam or the 20-022 with a horizontal cam, or the BEST 12E Series dummy rim cylinder at 1-5/32 inch diameter.
9) If I want to standardize a facility on interchangeable cores so I can swap keying without pulling cylinders, what should I look at instead?
A plug like the 487K21 is a fixed part of the cylinder, so rekeying means taking the cylinder apart. For swap-in-place key control, look at interchangeable core products: the BEST 1CB 150 Series interchangeable core, the BEST 1CDF drill resistant patented 7-pin brass core, or Schlage full size interchangeable cores such as the 20-057 with convertible tailpiece cam and the 20-057-C in the C keyway.
10) What is the simpler 5-pin alternative if I do not need 7-pin key control?
The Corbin Russwin 487K21 is a 7-Pin X Class plug, chosen where tighter key control is wanted. For openings where five pins are enough, the BEST 1C Series standard 5-pin cylinder core and the Adams Rite 4036 five-pin mortise cylinder are five-pin options. Note that those are a core and a complete cylinder respectively, not mortise cylinder plugs, and neither uses the Corbin Russwin 27A2 keyway.
11) I am replacing a cylinder in a key-in-lever lockset. Is the Corbin Russwin 487K21 the right part?
No - the 487K21 is a plug for 2 inch mortise cylinders. Key-in-knob and key-in-lever locksets take a different cylinder format: the Falcon A23161-05 G is a key-in-lever cylinder, RU/T series, 6-pin G keyway, keyed different with two cut keys; the Kaba Ilco 1539 is a key-in-knob/lever universal cylinder; and the Kaba Ilco 1579 is a knob and lever cylinder for Sargent locks. Pick by the lockset brand you are servicing.
12) What do I use for a deadbolt cylinder instead of the 487K21?
The Corbin Russwin 487K21 is a commercial mortise cylinder plug and is not a deadbolt part. For deadbolt work the Kaba Ilco 1549 is a key-in-deadbolt cylinder and the Kaba Ilco 1599 is a key-in-knob replacement cylinder, both listed with a deadbolt function; the Medeco 1075127 is a 5-pin rim type lazy motion single cylinder for handlesets and deadbolts, and the Medeco 1012040 is a 6-pin lazy motion rim cylinder for Kwikset single cylinder deadbolts.
13) I want to standardize a facility on removable cores rather than servicing plugs. What are my options?
The Corbin Russwin 487K21 27A2 is a conventional 7-Pin X Class mortise cylinder plug, serviced by pinning the plug. If the goal is field-swappable cores, the BEST Peaks 1CB 150 series interchangeable core and the BEST 1CDF drill resistant patented 7-pin interchangeable core are small-format core options, and the Schlage 20-057-C is a full size interchangeable core in the C keyway with a 643E Aged Bronze finish. Moving to any of those changes the keyway, so plan the keying system for the whole facility at the same time.
14) Does the Corbin Russwin 487K21 work in an Adams Rite narrow stile aluminum door with a cylinder pull?
The 487K21 is a plug for 2 inch Corbin Russwin mortise cylinder housings, so it is not the part for an Adams Rite cylinder pull assembly. For those openings the Adams Rite 4024 cylinder pull with trim plate mounting and the 4025 five pin tumbler cylinder pull with through-screws are made for the MS1847 deadlock/deadlatch, and the 4026 five pin tumbler cylinder pull is for the 5017 wood door deadlock/deadlatch.
15) Is this plug suitable for commercial buildings like schools and hospitals, or is it a residential part?
It's a commercial part. Corbin Russwin lists the 487K21 as commercial-grade, and it's used in office buildings, schools, healthcare, government facilities, retail, multi-tenant residential and warehouses where key control is managed centrally.
16) What is the exact model designation to order the satin brass 7-pin Corbin Russwin plug?
Order it as Corbin Russwin 487K21 27A2, then specify finish: 606 for Satin Brass or 626 for Satin Chrome.
17) I need a non-keyed dummy cylinder for a pull-side trim. Can I use the 487K21 without pinning it?
No - the Corbin Russwin 487K21 is a keyed 7-Pin X Class plug with the 27A2 keyway, intended to operate. Where a cylinder is needed only for appearance, the BEST 12E series dummy rim cylinder with a 1-5/32 inch diameter is the purpose-built non-operating part.
18) How do I match finish if I am mixing the 487K21 with other cylinders on the same opening?
The Corbin Russwin 487K21 27A2 plug is offered in 606 Satin Brass and 626 Satin Chrome, which covers the two most common commercial door hardware finishes. Among comparable cylinders, the Schlage 20-057-C is listed in 643E Aged Bronze, so if the rest of the opening is being built around that darker finish the brass and chrome plugs will read differently side by side.
19) Is the Emtek CY4 cylinder an alternative to the Corbin Russwin 487K21?
They serve different openings. The Emtek CY4 is a cylinder sold as a part for Emtek residential-style hardware, and Medeco offers retrofit cylinders into that family - the 1065140 is a 5-pin retrofit cylinder for Arrow JL interconnected locks and Emtek handleset and deadbolt outside cylinders, and the 1065244 is a 5-pin rim lazy motion cylinder with an Emtek tailpiece. The Corbin Russwin 487K21 is a commercial 7-Pin X Class plug for 2 inch Corbin Russwin mortise cylinders with the 27A2 keyway.
How fast can I get the Corbin Russwin 487K21 27A2 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 487K21 27A2 626 come with a warranty?
Absolutely. The Corbin Russwin 487K21 27A2 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 487K21 27A2 626?
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