Corbin Russwin 487K21 7-Pin X ...
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$94.00
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Corbin Russwin 487K21 7-Pin X Class Plug, 2" Mortise Cylinder with 27B1 Keyway, Satin Brass

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Model: 487K21 27B1 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 with 27B1 Keyway, Satin Brass

The Corbin Russwin 487K21 27B1 is a 7-Pin X Class plug designed for 2" mortise cylinder applications, finished in Satin Brass. Featuring the 27B1 keyway, this precision-engineered replacement cylinder plug is built to Corbin Russwin's commercial-grade standards and is compatible with Corbin Russwin cylinder systems requiring X Class security. Ideal for facilities management, locksmith professionals, and commercial hardware installers seeking a direct replacement plug that maintains keying integrity and system compatibility.

Key Features

  • X Class Security Pin Configuration: 7-Pin X Class plug provides enhanced key control and security suitable for demanding commercial environments.
  • 2" Mortise Cylinder Format: Precisely sized at 2" for direct compatibility with standard mortise cylinder applications.
  • 27B1 Keyway: Factory-specified 27B1 keyway ensures proper key fit and keying system integrity within compatible Corbin Russwin lock systems.
  • Satin Brass Finish: Durable Satin Brass finish provides a professional appearance and corrosion resistance for long-term performance.
  • Genuine Corbin Russwin Cylinder Part: Manufactured as an authentic Corbin Russwin cylinder component, ensuring fit and function consistent with original equipment specifications.
  • Commercial-Grade Construction: Engineered for commercial applications where reliable keying performance and durability are essential.
  • Direct Replacement Design: Designed as a replacement part for compatible Corbin Russwin mortise cylinder assemblies, simplifying service and rekeying operations.

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 27B1
  • 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 parts are manufactured to exacting commercial standards, delivering consistent performance and compatibility within Corbin Russwin keying systems. The 487K21 27B1 plug's 7-Pin X Class configuration and genuine factory construction make it a dependable choice for locksmiths and facility managers maintaining high-security commercial door hardware installations.

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 27B1
Features:
Corbin Russwin Cylinder Parts

Corbin Russwin 487K21 27B1 626 – Frequently Asked Questions

1) What exactly is the Corbin Russwin 487K21 27B1 part, a complete cylinder or just the plug?
It is the plug only, not a full cylinder. The 487K21 is a 7-pin X Class cylinder plug sized for 2 inch mortise cylinder applications with the 27B1 keyway. You install it into an existing compatible Corbin Russwin mortise cylinder shell, so if you need a whole cylinder assembly this is not the part to order.
2) Will the 487K21 plug key into my existing Corbin Russwin master key system?
Only if your system runs the 27B1 keyway. The 487K21 27B1 is factory cut for that keyway and will maintain keying integrity within Corbin Russwin systems using it. A Corbin Russwin system on a different keyway, or any other brand's keyway, will not accept this plug.
3) Can I use a 487K21 plug in a rim cylinder or an interchangeable core housing?
No. It is cut for 2 inch mortise cylinder applications only. For a rim device you need a rim cylinder such as the Schlage 20-021 with a vertical tailpiece cam or the 20-022 with a horizontal cam. For an interchangeable core housing, a core is the part, for example the BEST 1CDF drill resistant 7-pin core or the Schlage 20-057 6-pin FSIC.
4) Is the Corbin Russwin 487K21 a complete mortise cylinder, or do I need a different part if the whole cylinder is being replaced?
The 487K21 27B1 is a 7-pin X Class plug for 2 inch mortise cylinder applications - a replacement plug that goes into a Corbin Russwin cylinder body, not a finished cylinder assembly. If the entire cylinder is coming out of the door, a complete mortise cylinder such as the Adams Rite 4036, a Grade 1 five-pin mortise cylinder, is the type of part to order instead. Use the 487K21 when the housing stays in the lock and only the plug and keying change.
5) What should I use instead of the Corbin Russwin 487K21 if the opening takes a rim cylinder rather than a mortise cylinder?
The 487K21 27B1 plug is built for 2 inch mortise cylinder applications, so it will not serve a rim-prepped device. For rim applications the Schlage Commercial 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; pick the cam orientation the exit device requires. The BEST 12E Series dummy rim cylinder, 1-5/32 inch diameter, covers a rim opening where no key function is wanted.
6) We want a keying system where cores can be swapped without pulling the cylinder. Is the Corbin Russwin 487K21 the right approach?
The 487K21 27B1 is a fixed 7-pin X Class plug keyed to the 27B1 keyway, so rekeying means servicing the plug itself. If the goal is field-swappable keying, an interchangeable core format fits better: the BEST 1CB is a Peaks 150 Series interchangeable core cylinder, the BEST 1CDF is a drill-resistant patented interchangeable core in 7-pin brass, and the Schlage 20-057 is a 6-pin full size interchangeable core rim cylinder with a convertible tailpiece cam. The Schlage 20-057-C is an FSIC core in the C keyway.
7) Is the 487K21 a 6-pin or 7-pin plug, and does that matter for my keys?
Seven pins. The X Class configuration is a 7-pin arrangement, so it is not a substitute for a 6-pin Corbin Russwin plug and 6-pin keys cut on a different system will not operate it. Keys must be cut for the 7-pin X Class 27B1 system.
8) I need a whole mortise cylinder, not a plug. What should I look at instead?
Order a complete mortise cylinder. The Detex MC65 is a 1-1/8 inch 6-pin commercial mortise cylinder in the Schlage C keyway, and the Adams Rite 4036 is a Grade 1 five-pin mortise cylinder rated for a 1/2 inch minimum door thickness. Both are full cylinders rather than plugs, but neither runs the Corbin Russwin 27B1 keyway, so they suit a new or standalone opening rather than an existing 27B1 system.
9) Can a Detex MC65 mortise cylinder replace the Corbin Russwin 487K21?
They are not interchangeable as ordered. The 487K21 is a 7-pin X Class plug for 2 inch mortise cylinder applications with the Corbin Russwin 27B1 keyway. The Detex MC65 is a complete 1-1/8 inch 6-pin commercial mortise cylinder cut to the Schlage C keyway, so it brings a different keyway, pin count, and length. It suits a door being moved onto Schlage C keying; it will not maintain a 27B1 Corbin Russwin master key system.
10) The cylinder I need to replace is in a knob, lever, or deadbolt rather than a mortise lock. What takes the place of the 487K21 there?
The 487K21 is a mortise cylinder plug, so a key-in-knob or deadbolt body needs a different cylinder entirely. Kaba Ilco offers the 1539 Series key-in-knob and lever universal cylinder, the 1549 Series key-in-deadbolt cylinder, the 1579 knob and lever cylinder for Sargent, and the 1599 key-in-knob replacement cylinder. On Falcon RU/T levers, the Falcon A23161-05 G is a key-in-lever cylinder with a 6-pin G keyway supplied keyed different with two cut keys.
11) Will the Corbin Russwin 487K21 work in an Adams Rite aluminum door deadlock or cylinder pull?
No. The 487K21 is a 7-pin X Class plug for 2 inch Corbin Russwin mortise cylinders. Adams Rite narrow stile hardware uses its own dedicated pieces: the 4024 cylinder pull with trim plate mounting and the 4025 five pin tumbler cylinder pull with through-screws are both made for the MS1847 deadlock/deadlatch, and the 4026 five pin tumbler cylinder pull is for the 5017 wood door deadlock/deadlatch. The 4036 is the Grade 1 mortise cylinder in that family.
12) Is there a simpler 5-pin option than the 7-pin 487K21 X Class plug?
The 487K21 27B1 is a 7-pin X Class plug intended to hold key control in a Corbin Russwin high-security system. Where that level of key control is not required, lower pin count parts exist in other lines: the BEST 1C Series is a standard 5-pin cylinder core, and the Adams Rite 4036 is a five-pin Grade 1 mortise cylinder. Both step away from Corbin Russwin 27B1 keying, so they suit new standalone keying rather than service on an existing X Class system.
13) What finishes does the Corbin Russwin 487K21 plug come in?
Two: 606 Satin Brass and 626 Satin Chrome. Satin chrome is the usual pick when the rest of the trim on the opening is 626, and satin brass when you are matching older brass hardware. The plug face is the only visible part, so match it to the cylinder ring and the lock trim already on the door.
14) Is this plug suitable for a high traffic commercial building or is it residential grade?
Commercial. The 487K21 is built to Corbin Russwin's commercial standards for X Class key control and is used in offices, schools, healthcare, government buildings, retail, warehouses and multi-tenant residential. Facilities standardizing on a restricted Corbin Russwin keyway are the typical buyer.
15) Is the 487K21 a genuine Corbin Russwin part or an aftermarket copy?
Genuine Corbin Russwin. It is an authentic factory cylinder component, which is what keeps fit and function consistent with the original equipment and lets it drop into a service or rekey job without machining.
16) If the finish is the deciding factor, what are my choices on the Corbin Russwin 487K21 versus similar cylinder parts?
The 487K21 27B1 plug is offered in 606 Satin Brass and 626 Satin Chrome, which lets it match either brass or chrome trim on the rest of the opening. Among comparable cylinder parts, the Schlage 20-057-C full size interchangeable core is listed in 643E Aged Bronze, a darker tone for openings built around bronze hardware.
How fast can I get the Corbin Russwin 487K21 27B1 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 27B1 626 come with a warranty?
Absolutely. The Corbin Russwin 487K21 27B1 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 27B1 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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