Corbin Russwin 487K21 7-Pin X ...
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$94.00
$81.02
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Corbin Russwin 487K21 7-Pin X Class Mortise Cylinder Plug, 2" with 57A2 Keyway in Satin Brass

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Model: 487K21 57A2 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 with 57A2 Keyway in Satin Brass

The Corbin Russwin 487K21 is a 7-Pin X Class plug designed for 2" mortise cylinder applications, featuring the 57A2 keyway and a Satin Brass finish. Engineered as a precision replacement part for compatible Corbin Russwin mortise cylinder assemblies, this plug delivers the exacting tolerances and security-class performance expected from a professional-grade commercial cylinder component. Ideal for locksmiths and facility managers performing cylinder re-keying or replacement work on commercial door hardware installations.

Key Features

  • 7-Pin X Class Security: X Class pin configuration provides enhanced key control and security for commercial mortise cylinder applications.
  • 2" Mortise Cylinder Format: Precisely dimensioned for direct compatibility with standard 2" mortise cylinder housings used in commercial door hardware.
  • 57A2 Keyway: Configured with the 57A2 keyway for seamless integration into Corbin Russwin keying systems and master key programs.
  • Satin Brass Finish: Satin Brass finish provides a professional appearance consistent with coordinated commercial hardware installations.
  • Genuine Corbin Russwin Cylinder Part: Manufactured as an authentic Corbin Russwin cylinder component, ensuring proper fit and function within compatible assemblies.
  • Commercial-Grade Replacement Part: Designed for commercial applications requiring reliable, long-term performance in high-use environments.
  • Precision Engineered: Built to the tight tolerances required for smooth key operation and dependable security performance in mortise lock applications.

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 57A2
  • Features: Corbin Russwin Cylinder Parts

Typical Applications

  • Commercial Office Buildings Requiring Cylinder Replacement or Re-Keying
  • Educational Facilities with Corbin Russwin Mortise Lock Systems
  • Healthcare Institutions Maintaining Existing Keying Programs
  • Government and Municipal Buildings with Corbin Russwin Hardware
  • Retail Establishments Servicing Commercial Mortise Cylinders
  • Multi-Tenant Residential and Mixed-Use Properties
  • Industrial and Warehouse Facilities with Commercial Door Hardware

Why Corbin Russwin 487K21?

Corbin Russwin cylinder parts are engineered to the same exacting standards as the original assemblies, ensuring reliable fit and consistent security performance throughout the service life of the hardware. The 487K21 plug's 7-Pin X Class configuration and precise 57A2 keyway specification make it the correct-specification replacement for compatible Corbin Russwin mortise cylinder installations, maintaining the integrity of existing master key programs and access control strategies in demanding commercial environments.

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 57A2
Features:
Corbin Russwin Cylinder Parts

Corbin Russwin 487K21 57A2 626 – Frequently Asked Questions

1) Does a 7-pin plug work in a 6-pin Corbin Russwin cylinder housing?
No. The 487K21 is a 7-pin X Class plug and it is dimensioned for 2 inch Corbin Russwin mortise cylinder housings built for that pin count. A 6-pin housing has a shorter pin stack chamber layout and will not accept it. Match the plug to the pin count and length of the housing you are rebuilding.
2) If the mortise cylinder housing itself is worn, not just the plug, what complete mortise cylinder can be installed instead of a Corbin Russwin 487K21 plug?
The 487K21 is a plug only - a replacement part for an existing Corbin Russwin mortise cylinder assembly, supplied with the 57A2 keyway. If the housing is damaged rather than the plug, a complete mortise cylinder is the right call. The Adams Rite 4036 is a Grade 1 mortise cylinder with five-pin security for doors 1/2 inch thick and up, and the Detex MC65 is a 1-1/8 inch six-pin mortise cylinder cut to the Schlage C keyway. Both replace the whole cylinder, so neither keeps an existing Corbin Russwin 57A2 master key program - the keying would change over to the new keyway.
3) What is the difference between a Corbin Russwin 487K21 plug and an interchangeable core like the BEST 1CB?
The 487K21 is a 7-pin X Class plug that drops into a compatible Corbin Russwin 2 inch mortise cylinder housing, so re-keying means pinning the plug. An interchangeable core such as the BEST Peaks 1CB in the 150 Series, or the drill-resistant 1CDF 7-pin brass core, pulls out of its housing with a control key and is swapped as a unit - no pinning at the door. The BEST 1C standard 5-pin core is the same removable format in a five-pin build. Choosing a core system means changing the cylinder housing as well, since a plug and a core are not interchangeable in the same body.
4) I need a whole mortise cylinder, not a plug. What else does ZenSupply carry?
For a complete mortise cylinder, the Detex MC65 is a 1-1/8 inch 6-pin mortise cylinder in Schlage C keyway, and the Adams Rite 4036 is a Grade 1 five-pin mortise cylinder. Neither works in a Corbin Russwin 57A2 keying system though, so if you have to stay on 57A2 keys, order the Corbin Russwin cylinder rather than a cross-brand substitute.
5) Can I swap this plug in on the door, or does the cylinder have to come out?
The cylinder has to come out. This is a plug, not an interchangeable core, so the mortise cylinder is removed from the lock and disassembled on the bench to change it. If you want cores you can pull and swap at the door, look at an interchangeable-core product instead, for example the BEST 1CB or the drill-resistant 7-pin BEST 1CDF.
6) Will a Corbin Russwin 487K21 plug work in a rim cylinder or a key-in-lever cylinder?
No. The 487K21 is dimensioned for 2 inch mortise cylinder housings, which is a different body from rim and key-in-lever cylinders. 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 cylinder with a horizontal cam; the 20-057 is a 6-pin FSIC rim cylinder with a convertible tailpiece cam. For key-in-lever work, the Falcon A23161-05 G is a 6-pin G keyway lever cylinder keyed different, and the Kaba Ilco 1539 is a universal key-in-knob and lever cylinder. None of these accept a mortise cylinder plug.
7) Is there a simpler five-pin option instead of the 7-pin X Class 487K21 plug?
The 487K21 is built as a 7-pin X Class plug, which is what gives it the added key control for commercial mortise applications; it is not offered in a five-pin build. If a five-pin cylinder suits the opening, the Adams Rite 4036 is a Grade 1 mortise cylinder with five-pin security. Note the tradeoff: moving to a five-pin cylinder of another keyway takes the door off the Corbin Russwin 57A2 keying program the 487K21 is made to preserve.
8) Can a Corbin Russwin 487K21 plug be used on a Sargent or Kwikset lock?
No - the 487K21 is a genuine Corbin Russwin cylinder part cut to the 57A2 keyway and fits compatible Corbin Russwin 2 inch mortise cylinder assemblies only. For other brands, the Kaba Ilco 1579 is a knob and lever cylinder made for Sargent, and the Medeco 1012040 is a 6-pin lazy-motion rim cylinder for Kwikset single cylinder deadbolts. The Medeco 1065140 is a 5-pin retrofit cylinder for Arrow JL interconnected locks and Emtek handleset and deadbolt outside cylinders.
9) For a deadbolt cylinder replacement, is the 487K21 the right part?
The 487K21 is a mortise cylinder plug for commercial mortise lock assemblies, not a deadbolt cylinder. For deadbolt work the Kaba Ilco 1549 key-in-deadbolt cylinder and the 1599 key-in-knob replacement cylinder are both catalogued with a deadbolt function, and the Medeco 1075127 is a 5-pin rim-type lazy motion single cylinder for handlesets and deadbolts. Those replace the deadbolt cylinder as a unit rather than re-pinning a plug inside an existing mortise housing.
10) Do I need a cylinder pull instead of a 487K21 plug on an aluminum storefront deadlock?
Likely yes, if the door has an Adams Rite deadlock rather than a Corbin Russwin mortise lock. The 487K21 is a plug for Corbin Russwin 2 inch mortise cylinders. 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 with through-screws; the 4026 five-pin cylinder pull is for the 5017 wood door deadlock and deadlatch. Those are complete pull assemblies, not a plug for an existing cylinder.
11) What finishes does the Corbin Russwin 487K21 come in, and can it be matched to other cylinder hardware?
The 487K21 plug is offered in 606 Satin Brass and 626 Satin Chrome, so it can be coordinated with brass or chrome mortise trim on the same openings. If a different tone is needed on an adjacent cylinder, the Schlage 20-057-C full size interchangeable core is supplied in 643E Aged Bronze with a C keyway - a different cylinder format and keyway, so it would be a separate keying group rather than part of a 57A2 program.
12) Is there a non-keyed alternative to the 487K21 for an opening that only needs the look of a cylinder?
The 487K21 is a functioning 7-pin X Class plug, so every one is keyed. Where an opening needs the appearance of a cylinder without key operation, the BEST 12E Series dummy rim cylinder with a 1-5/32 inch diameter serves that role. It is a rim format, so it does not go into a 2 inch mortise cylinder housing.
13) Is this a residential part or commercial-grade?
Commercial. The 487K21 plug is specified for commercial mortise lock work, the kind found in offices, schools, hospitals and municipal buildings running Corbin Russwin hardware. It is not a residential deadbolt cylinder.
How fast can I get the Corbin Russwin 487K21 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 487K21 57A2 626 come with a warranty?
Absolutely. The Corbin Russwin 487K21 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 487K21 57A2 626?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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