Corbin Russwin 487K21 7-Pin X ...
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Corbin Russwin 487K21 7-Pin X Class Mortise Cylinder Plug, 2" with 57B1 Keyway in Satin Brass

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Model: 487K21 57B1 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 2" Mortise Cylinder Plug with 57B1 Keyway in Satin Brass

The Corbin Russwin 487K21 is a precision-engineered 7-Pin X Class plug designed for 2" mortise cylinder applications. Featuring the 57B1 keyway and a Satin Brass finish, this replacement cylinder plug is a genuine Corbin Russwin component built to maintain the security integrity and key control standards of the X Class cylinder system. Ideal for commercial door hardware installations where reliable, brand-consistent replacement parts are essential.

Key Features

  • 7-Pin X Class Configuration: Features a 7-pin X Class plug design delivering enhanced key control and security for commercial mortise cylinder applications.
  • 2" Mortise Cylinder Compatibility: Precisely sized at 2" for direct compatibility with standard mortise cylinder housings used in commercial door hardware.
  • 57B1 Keyway: Manufactured to the 57B1 keyway specification, ensuring proper key interchange within Corbin Russwin X Class keying systems.
  • Satin Brass Finish: Finished in Satin Brass for a professional appearance that coordinates with complementary Corbin Russwin hardware.
  • Genuine Corbin Russwin Component: An authentic Corbin Russwin cylinder part engineered to maintain the performance and security standards of the original mortise cylinder assembly.
  • Commercial-Grade Replacement Part: Designed specifically for commercial applications, supporting easy field replacement and re-keying of existing mortise cylinder 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: 487K21 57B1
  • Features: Corbin Russwin Cylinder Parts

Typical Applications

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

Why Corbin Russwin 487K21?

Corbin Russwin cylinder parts are manufactured to exacting standards, ensuring seamless compatibility and consistent key control performance within the X Class cylinder system. The 487K21 plug supports reliable field serviceability for commercial mortise lock installations where maintaining original security specifications is critical. Specifying genuine Corbin Russwin replacement components helps preserve the integrity of the overall keying system and the long-term performance of the door hardware assembly.

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 57B1
Features:
Corbin Russwin Cylinder Parts

Corbin Russwin 487K21 57B1 626 – Frequently Asked Questions

1) Will a 57B1 keyway plug work in my existing Corbin Russwin keying system?
Only if your system is built on the 57B1 keyway within the Corbin Russwin X Class family. The 487K21 is cut to the 57B1 keyway specification so keys already operating on that keyway in an X Class system will interchange. A different Corbin Russwin keyway, or a non-X Class cylinder, will not accept these keys. Check the keyway stamped on the cylinder you are servicing before ordering.
2) I need a complete 1-1/8 inch mortise cylinder, not just a plug. What should I order instead of the Corbin Russwin 487K21?
The Corbin Russwin 487K21 is a 7-pin X Class cylinder plug for 2 inch mortise cylinder applications - it is the keyed plug that goes into a mortise housing, not a finished cylinder with cam and rings. For a complete mortise cylinder, the Detex MC65 is a 1-1/8 inch 6-pin mortise cylinder cut to the Schlage C keyway, and the Adams Rite 4036 is a five-pin mortise cylinder rated Grade 1. Both are assembled cylinders rather than plugs, so neither carries the 57B1 keyway or X Class key control the 487K21 maintains.
3) Is a BEST interchangeable core an equivalent to the Corbin Russwin 487K21?
They solve the same problem in different systems. The 487K21 is a 7-pin X Class plug keyed to the 57B1 keyway, serviced by pulling and replacing the plug inside a 2 inch mortise cylinder. BEST's approach uses a removable core: the 1CDF is a drill resistant patented interchangeable core with 7 pins in brass, 150 series, and the 1C5 is a standard 5-pin cylinder core. A BEST core will not seat in a Corbin Russwin X Class mortise cylinder housing, so the two are not interchangeable within the same keying system.
4) My exit device takes a rim cylinder. Can I use the Corbin Russwin 487K21?
No. The 487K21 is a plug for 2 inch mortise cylinder applications, so it will not drive a rim device. 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 tailpiece cam; the 20-057 is a 6-pin FSIC rim cylinder with a convertible tailpiece cam. Match the cam orientation to what your device requires.
5) Can I use this plug to rekey a mortise cylinder in the field instead of replacing the whole lock?
That's what it's for. Swapping the 487K21 plug into an existing 2 inch Corbin Russwin mortise cylinder lets you change the keying or replace a worn plug without pulling the mortise lock body out of the door. It's sold as a commercial replacement part for exactly that kind of field service, which is why maintenance shops in offices, schools, hospitals and multi-tenant buildings keep them on hand.
6) Is this 7-pin plug the same as a 6-pin cylinder plug?
No. The 487K21 is a 7-pin X Class plug, so the pin stack count and key bitting differ from a 6-pin cylinder. Keys cut for a 6-pin system will not run it. Comparable 6-pin cylinders sold for other systems, like the Schlage 20-021 rim cylinder or the Detex MC65 mortise cylinder, are separate platforms and their keys do not cross over.
7) I need an interchangeable core instead of a fixed plug. What should I look at?
A plug like the 487K21 is serviced by taking the cylinder apart, not by pulling a core. If you want keying changes without disassembly, go to an interchangeable core platform: BEST offers the 1CB 150 Series interchangeable core and the 1CDF drill-resistant patented 7-pin core, and Schlage offers the 20-057 full size interchangeable core cylinder. Those are different key systems, so standardize a building on one rather than mixing.
8) How do I specify the right 487K21 when ordering?
Two things settle it: the keyway and the finish. The model designation is 487K21 57B1, so the keyway is fixed at 57B1 in the 7-pin X Class system. What you choose is finish, either 606 Satin Brass or 626 Satin Chrome. Confirm the housing it's going into is a 2 inch Corbin Russwin mortise cylinder.
9) I need to rekey a key-in-lever lockset, not a mortise lock. Is the 487K21 the right part?
No - the 487K21 plug is sized for 2 inch mortise cylinder housings. Key-in-knob and key-in-lever locksets take a different cylinder body: the Kaba Ilco 1539 is a key-in-knob and lever universal cylinder, the 1599 is a key-in-knob replacement cylinder, and the 1579 is a knob and lever cylinder for Sargent locks. The Falcon A23161-05 G is a key-in-lever cylinder on the RU/T series with a 6-pin G keyway, keyed different and supplied with two cut keys.
10) What is the simpler option if I do not need patented key control on this opening?
The Corbin Russwin 487K21 is built around X Class key control with a 7-pin 57B1 plug, which is what you specify when the keying system has to stay restricted. On openings where that is not required, a conventional cylinder is simpler to stock and key: the Adams Rite 4036 is a five-pin mortise cylinder in Grade 1, and the Detex MC65 is a 6-pin mortise cylinder on the widely stocked Schlage C keyway. Both are standard-keyway parts rather than restricted-system components.
11) For an aluminum storefront with an Adams Rite MS1847 deadlock, is the Corbin Russwin 487K21 what I need?
The 487K21 is a keyed plug for 2 inch mortise cylinders in commercial mortise lock assemblies. On an MS1847 deadlock or deadlatch, the cylinder is carried in a pull: the Adams Rite 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 designed for the Adams Rite 5017 wood door deadlock or deadlatch.
12) What should I use instead of the 487K21 for a residential deadbolt or handleset?
The 487K21 is specified for commercial applications as a mortise cylinder plug in the X Class system. Deadbolts and handlesets take rim-type retrofit cylinders instead: 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 for Arrow JL interconnected locks and Emtek handleset and deadbolt outside cylinders.
13) Is the 487K21 suitable for residential doors?
It is built for commercial door hardware, and it only makes sense if the door already carries a Corbin Russwin X Class mortise cylinder. Typical use is offices, schools, healthcare, retail, government buildings, warehouses and multi-tenant residential. For a house with a standard deadbolt or handleset, look at residential retrofit cylinders such as the Medeco 1012040 rim cylinder for Kwikset single cylinder deadbolts or the Medeco 1065140 for Emtek handlesets and deadbolts.
14) I only need to fill a cylinder hole with no keying. Is there a substitute for the 487K21?
The 487K21 is a functioning 7-pin keyed plug, so it is more part than a blank opening needs. Where the hole only has to be filled, the BEST 12E Series dummy rim cylinder measures 1-5/32 inch in diameter and provides the cylinder appearance without a keyed mechanism. Note that it is a rim-style dummy, not a 2 inch mortise plug, so confirm the prep before ordering.
15) Will the Corbin Russwin 487K21 finish match if I mix it with other brands' cylinders on the same door?
The 487K21 plug is offered in 606 Satin Brass and 626 Satin Chrome, chosen to coordinate with complementary Corbin Russwin hardware. Cross-brand cylinders are published in their own finish sets - the Schlage 20-057-C full size interchangeable core, for example, is a C keyway core in 643E Aged Bronze. If the visible cylinder faces have to look alike, keep them within one finish family rather than mixing series.
How fast can I get the Corbin Russwin 487K21 57B1 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 487K21 57B1 626 come with a warranty?
Absolutely. The Corbin Russwin 487K21 57B1 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 57B1 626?
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