Corbin Russwin 487K21 7-Pin X ...
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Corbin Russwin 487K21 7-Pin X Class Plug, 2" Mortise Cylinder Replacement Part, 57B2 Keyway, Satin Brass

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Model: 487K21 57B2 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 Plug, 2" Mortise Cylinder Replacement Part, 57B2 Keyway, Satin Brass

The Corbin Russwin 487K21 is a 7-Pin X Class replacement plug designed for 2" mortise cylinder applications. Featuring the 57B2 keyway and a Satin Brass finish, this precision-engineered cylinder component is built for commercial-grade mechanical lock systems. Designed as a direct replacement part, it integrates seamlessly with compatible Corbin Russwin mortise cylinder assemblies, providing reliable key control and long-lasting performance in demanding institutional and commercial environments.

Key Features

  • 2" Mortise Cylinder Format: Designed specifically for 2" mortise cylinder applications, ensuring correct fit within compatible commercial lock assemblies.
  • 7-Pin X Class Configuration: Features a 7-pin X Class plug for enhanced key control and security in commercial door hardware systems.
  • 57B2 Keyway: Utilizes the 57B2 keyway, providing compatibility with Corbin Russwin keying systems for consistent key management across installations.
  • Satin Brass Finish: Finished in Satin Brass for a professional appearance that coordinates with standard commercial hardware finishes.
  • Commercial-Grade Replacement Part: Engineered as a direct replacement component for Corbin Russwin mortise cylinder assemblies in commercial mechanical lock applications.
  • Corbin Russwin Cylinder Parts Compatibility: Designed and classified as a genuine Corbin Russwin cylinder part, ensuring reliable fit and function within the manufacturer's lock system ecosystem.

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 57B2
  • Features: Corbin Russwin Cylinder Parts

Typical Applications

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

Why Corbin Russwin 487K21?

Corbin Russwin cylinder replacement parts are engineered to exacting commercial standards, delivering dependable performance in high-traffic institutional and commercial environments. The 487K21 7-Pin X Class plug provides precise key control through the 57B2 keyway system, making it a trusted solution for facilities managers and security professionals requiring reliable lock maintenance with genuine manufacturer components.

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 57B2
Features:
Corbin Russwin Cylinder Parts

Corbin Russwin 487K21 57B2 626 – Frequently Asked Questions

1) What exactly is the Corbin Russwin 487K21, a complete cylinder or just a part of one?
It's a plug, not a finished cylinder. The 487K21 is the 7-pin X Class plug that goes inside a 2 inch Corbin Russwin mortise cylinder, supplied as a replacement component for an existing cylinder assembly. If you need a working cylinder out of the box with a housing, cam and cut keys, this isn't it, order a complete mortise cylinder instead.
2) Will a 57B2 keyway plug work in my existing Corbin Russwin keying system?
Only if your system is already on the 57B2 keyway. The plug is cut for 57B2, so it keys into Corbin Russwin systems using that keyway and lets you keep one key running across the openings you already have. A cylinder on a different Corbin Russwin keyway needs the plug for that keyway, the plug does not accept another keyway's key.
3) I need a complete mortise cylinder, not a plug. What else could I buy?
For a full mortise cylinder, the Detex MC65 is a 1-1/8 inch 6-pin commercial mortise cylinder on the Schlage C keyway, and the Adams Rite 4036 is a Grade 1 five-pin mortise cylinder. Note that both put you on a different keyway than Corbin Russwin 57B2, so they won't key into an existing 57B2 system. If you must stay on 57B2, rebuild the Corbin Russwin cylinder with the 487K21 plug instead.
4) Is a BEST interchangeable core the same thing as the Corbin Russwin 487K21 plug?
No. The 487K21 is a 7-pin X Class plug in the 57B2 keyway that is installed into a 2 inch Corbin Russwin mortise cylinder. A BEST 1CB is a 150 Series interchangeable core cylinder and the BEST 1CDF is a drill resistant patented 7-pin interchangeable core in the 1CDF Series - those pull out with a control key and drop into an IC housing rather than being rebuilt into a mortise shell. If the housing in the door is a conventional Corbin Russwin mortise cylinder, an IC core will not seat in it.
5) If I need a complete mortise cylinder rather than just a plug, what should I order instead of the Corbin Russwin 487K21?
The 487K21 is a replacement plug for 2 inch mortise cylinder applications, so it is a component that goes inside an existing cylinder shell rather than a finished cylinder. If the opening needs a whole mortise cylinder, the Detex MC65 is a 1-1/8 inch 6-pin mortise cylinder in the Schlage C keyway, and the Adams Rite 4036 is a Grade 1 five-pin mortise cylinder in the 4036 Series. Both arrive as assembled cylinders; the 487K21 assumes you already have the housing and are rebuilding it.
6) I need a rim cylinder for an exit device, not a mortise plug - what are the options?
The 487K21 plug is built for 2 inch mortise cylinder applications and will not serve a rim device. For rim applications the Schlage 20-021 is a 6-pin rim cylinder with a vertical tailpiece cam and two keys, and the 20-022 is the same 6-pin rim cylinder with a horizontal tailpiece cam. The Schlage 20-057 is a 6-pin FSIC rim cylinder with a convertible tailpiece cam if the facility is on full size interchangeable core. Tailpiece orientation is dictated by the exit device, so confirm that before choosing between the 20-021 and 20-022.
7) Can I use the Corbin Russwin 487K21 in a key-in-knob or key-in-lever lock?
No - it is a plug for 2 inch mortise cylinders. Key-in-knob and key-in-lever bodies take a different cylinder format: the Kaba Ilco 1539 Series is a key-in-knob and lever universal cylinder, the 1579 Series is a knob and lever cylinder for Sargent, the 1599 is a key-in-knob replacement cylinder, and the Falcon A23161-05 G is a key-in-lever cylinder with a 6-pin G keyway keyed different with two cut keys. Match the cylinder to the lock chassis brand before ordering.
8) For an aluminum storefront door with an Adams Rite deadlock, is the Corbin Russwin 487K21 the right cylinder part?
It is not. The 487K21 plug fits 2 inch Corbin Russwin mortise cylinders. Adams Rite narrow stile deadlocks take purpose-built cylinder hardware: the 4024 cylinder pull mounts with a trim plate for MS1847 deadlock and deadlatch systems, the 4025 is a five pin tumbler cylinder pull with through-screws for the MS1847, and the 4026 is a five pin tumbler cylinder pull for the 5017 wood door deadlock and deadlatch. Choose by the lock body already in the stile.
9) Will the 487K21 plug fit a rim cylinder or a key-in-lever cylinder?
No, it's a mortise cylinder plug only. Rim applications take a rim cylinder such as the Schlage 20-021 (vertical tailpiece cam) or 20-022 (horizontal cam), and key-in-lever work takes a lever cylinder like the Falcon A23161-05 G or the Kaba Ilco 1599 replacement key-in-knob cylinder.
10) How do I order the right 487K21 for my job?
Two things to specify: the keyway and the finish. The model designation is 487K21 57B2, which fixes the keyway at 57B2, and you then choose 606 Satin Brass or 626 Satin Chrome. Confirm the cylinder you're rebuilding is a 2 inch Corbin Russwin mortise cylinder set up for 7-pin X Class before you order.
11) What is the difference between the Corbin Russwin 487K21 and a 5-pin cylinder core like the BEST 1C5?
The 487K21 is a 7-pin X Class plug in the 57B2 keyway, so it carries seven chambers for key control in a Corbin Russwin mortise cylinder. The BEST 1C5 is a standard 5-pin cylinder core from the Standard and Premium Cores line. Beyond pin count, the two are different parts in different systems - the 1C5 is a removable core, the 487K21 is a plug pinned into a mortise cylinder housing.
12) Is a dummy cylinder an acceptable substitute for the Corbin Russwin 487K21?
Only where no key function is wanted. The 487K21 is a keyed 7-pin X Class plug in the 57B2 keyway that provides working key control. The BEST 12E Series dummy rim cylinder with a 1-5/32 inch diameter fills a cylinder hole for appearance and is not an operating plug. Use the dummy only on openings that are being blanked off.
13) My deadbolt needs a replacement cylinder - does the Corbin Russwin 487K21 work?
The 487K21 is a plug for 2 inch mortise cylinders, not a deadbolt cylinder. Kaba Ilco lists cylinders with a deadbolt function: the 1549 Series key-in-deadbolt cylinder, and the 1539, 1579 and 1599 Series cylinders are also listed with a deadbolt product function. Pick by the deadbolt manufacturer the cylinder has to drop into.
14) Is this plug suitable for a high traffic commercial building or is it a residential part?
Commercial. The 487K21 is classified for commercial mechanical lock service and is typically used in offices, schools, healthcare, government buildings, retail, warehouses and multi-tenant residential, where the extra pin count of the X Class plug gives tighter key control than a standard 5-pin.
15) What finishes does the Corbin Russwin 487K21 plug come in, and how does that compare with other cylinder parts?
The 487K21 is offered in 606 Satin Brass and 626 Satin Chrome. Among comparable cylinder items, the Schlage 20-057-C full size interchangeable core is listed in 643E Aged Bronze in the C keyway. If the other hardware on the opening is chrome or brass toned, the two 487K21 finishes cover the common commercial pairings.
How fast can I get the Corbin Russwin 487K21 57B2 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 57B2 626 come with a warranty?
Absolutely. The Corbin Russwin 487K21 57B2 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 57B2 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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