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 with 57A1 Keyway, 2" Mortise, Satin Brass

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Model: 487K21 57A1 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 57A1 Keyway

The Corbin Russwin 487K21 is a precision-engineered 7-Pin X Class plug designed for 2" mortise cylinder applications. Featuring the 57A1 keyway and a Satin Brass finish, this replacement cylinder plug is purpose-built for commercial door hardware installations where reliable, high-security key control and long-term performance are required. As a genuine Corbin Russwin cylinder part, it integrates seamlessly with compatible mortise lock systems to maintain system integrity.

Key Features

  • 7-Pin X Class Plug: High-security 7-pin tumbler configuration provides enhanced key control and pick resistance for demanding commercial applications.
  • 2" Mortise Cylinder Compatibility: Precisely machined to fit standard 2" mortise cylinder housings, ensuring accurate drop-in replacement installation.
  • 57A1 Keyway: Proprietary Corbin Russwin 57A1 keyway restricts unauthorized key duplication, supporting controlled access environments.
  • Satin Brass Finish: Durable Satin Brass finish provides a professional aesthetic consistent with commercial hardware standards.
  • Genuine Corbin Russwin Cylinder Part: Manufactured as an authentic OEM replacement component for Corbin Russwin mortise lock systems, ensuring proper fit and function.
  • Commercial-Grade Construction: Built to the tolerances and material standards expected in high-traffic commercial door hardware 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 57A1
  • 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 components are manufactured to exacting commercial-grade standards, delivering the precise tolerances required for reliable mortise lock operation. The 7-Pin X Class configuration and proprietary 57A1 keyway make the 487K21 plug a dependable choice for facilities requiring strict key control and long-term hardware consistency. Engineered for demanding commercial applications where maintaining system integrity and security performance is 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:
487K21 57A1
Features:
Corbin Russwin Cylinder Parts

Corbin Russwin 487K21 57A1 626 – Frequently Asked Questions

1) Is the Corbin Russwin 487K21 a complete mortise cylinder or just the plug?
It is the plug only, not a whole cylinder. The 487K21 is a 7-pin X Class cylinder plug meant to go into a 2 inch Corbin Russwin mortise cylinder housing. If you need a full assembled mortise cylinder with housing and cam, this part will not get you there on its own. For a complete mortise cylinder from another brand, the Adams Rite 4036 five-pin mortise cylinder is a Grade 1 option, and the Detex MC65 is a 1-1/8 inch six-pin mortise cylinder in Schlage C keyway.
2) Can I use this plug in a rim cylinder or a key-in-knob cylinder?
No. The 487K21 is machined for 2 inch mortise cylinder bodies only. For rim applications use a rim cylinder such as the Schlage 20-021 (vertical tailpiece cam) or 20-022 (horizontal cam). For key-in-knob or lever replacement, the Kaba Ilco 1539 universal knob/lever cylinder covers that, and the Falcon A23161-05 G is a six-pin key-in-lever cylinder.
3) Is there a seven-pin alternative to the Corbin Russwin 487K21 if I am not on the 57A1 keyway?
The 487K21 plug is cut to the proprietary Corbin Russwin 57A1 keyway, so it only serves systems keyed that way. For a seven-pin option on a different platform, the BEST 1CDF is a drill resistant patented interchangeable core in brass, seven-pin, from the 150 series. That is an interchangeable core rather than a mortise cylinder plug, so the housing has to be BEST figure-eight core prep.
4) Will the Corbin Russwin 487K21 work in a rim exit device?
No. The 487K21 is a plug for a 2 inch mortise cylinder body. Rim exit devices take a rim cylinder with a tailpiece cam: the Schlage 20-021 is a six-pin rim cylinder with a vertical tailpiece cam and the 20-022 is the same with a horizontal cam, both supplied with two keys. For a rim opening that accepts a full size interchangeable core, the Schlage 20-057 is a six-pin FSIC rim cylinder with a convertible tailpiece cam.
5) I need to rekey a key-in-lever lock, not a mortise cylinder. Is the 487K21 the right part?
No. The 487K21 serves 2 inch mortise cylinder housings on mortise lock systems. Key-in-lever and key-in-knob locks take a different cylinder body: the Falcon A23161-05 G is a key in lever cylinder in the RU/T series with a six-pin G keyway, keyed different with two cut keys, and the Kaba Ilco 1539 is a universal key-in-knob and lever cylinder. The Kaba Ilco 1579 is a knob and lever cylinder for Sargent locks.
6) Why choose a 7-pin plug instead of a 6-pin for a commercial building?
The extra chamber is about key control. A 7-pin X Class plug in the restricted 57A1 keyway gives you more master keying capacity and makes unauthorized key duplication much harder than an open six-pin section. That is the reason facilities running large master key systems (schools, hospitals, government, multi-tenant) standardize on it. If you do not need restricted keying, a six-pin cylinder such as the Detex MC65 in Schlage C is the simpler route.
7) I need to rekey a bank of Corbin Russwin mortise locks. Is replacing the plug the right approach?
Yes, if the housings are sound. Swapping the 487K21 plug lets you move a whole set of openings onto a new 57A1 key plan without pulling the mortise cylinder bodies or the locks. It is the standard maintenance path for a property manager keeping one brand across a building. If you would rather not repin at all, interchangeable-core systems like the BEST 1CB or the Schlage 20-057 FSIC core let you drop in a new core by hand instead.
8) What is a simpler, lower-pin-count core option compared with the 487K21 seven-pin plug?
The 487K21 uses a seven-pin X Class configuration for higher key control. Where a standard five-pin setup is acceptable, the BEST 1C5 is a standard five-pin cylinder core, and the BEST 1CB is a Peaks 150 series interchangeable core. Both are interchangeable cores for BEST-prepped housings, while the 487K21 is a plug for a Corbin Russwin 2 inch mortise cylinder.
9) What do I use instead of the 487K21 on a deadbolt?
The 487K21 is built for mortise cylinder housings in commercial mortise lock systems. For deadbolt applications the Kaba Ilco 1549 is a key-in-deadbolt cylinder and the Kaba Ilco 1599 is a key-in-knob replacement cylinder, both listed for deadbolt function. On residential-style handlesets and deadbolts, the Medeco 1075127 is a five-pin rim type lazy motion single cylinder.
10) Which cylinder parts look like substitutes for the 487K21 but are not?
A few nearby items are cylinders in name only for this job. The BEST 12E is a dummy rim cylinder at 1-5/32 inch diameter, so it does not key. The Adams Rite 4025 and 4026 are five pin tumbler cylinder pulls, the 4025 for MS1847 deadlocks with through-screws and the 4026 for 5017 wood door deadlocks, and the Adams Rite 4024 is a cylinder pull with trim plate mounting for MS1847 systems. The Emtek CY4 is a residential cylinder part. None of those goes into a Corbin Russwin 2 inch mortise cylinder housing keyed 57A1.
11) Is the 487K21 a genuine Corbin Russwin part or an aftermarket copy?
Genuine Corbin Russwin. It is an OEM cylinder component, which matters on a restricted 57A1 system because the plug has to hold factory tolerances and the correct keyway section for your existing keys to run in it.
12) The 487K21 comes in satin brass and satin chrome. What if I need a darker finish to match?
The 487K21 plug is offered in 606 satin brass and 626 satin chrome. If the opening calls for a bronze tone and a full size interchangeable core will serve, the Schlage 20-057-C is an FSIC cylinder with the C keyway in 643E aged bronze. That is a different keying platform, so it suits standardizing a separate group of doors rather than matching an existing 57A1 system.
How fast can I get the Corbin Russwin 487K21 57A1 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 57A1 626 come with a warranty?
Absolutely. The Corbin Russwin 487K21 57A1 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 57A1 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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