Corbin Russwin 447F45 Master R...
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Corbin Russwin 447F45 Master Ring Cylinder Collar, Solid Recessed, 0.172", Satin Chrome Replacement Part

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Model: 447F45 626

In Stock (leaves warehouse same day if ordered before 3pm ET)

$49.34
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Corbin Russwin 447F45 Master Ring Cylinder Collar, Solid, Recessed for Cylinder Head, 0.172" Satin Chrome Replacement Part

The Corbin Russwin 447F45 is a solid, recessed Master Ring Cylinder Collar engineered as a precision replacement component for Corbin Russwin cylinder assemblies. Designed to accommodate a 0.172" collar depth and finished in Satin Chrome, this part integrates seamlessly with compatible Corbin Russwin cylinder heads. Previously catalogued as part 576 3/8 and MR910-6, the 447F45 is the current replacement reference for commercial door hardware applications requiring exact OEM-grade fitment.

Key Features

  • Precise Collar Depth: Solid, recessed collar measured at 0.172" ensures accurate fitment with compatible Corbin Russwin cylinder heads.
  • Solid Construction: Solid collar body provides structural integrity and reliable long-term performance in demanding commercial door hardware applications.
  • Recessed Design: Recessed profile is engineered specifically for cylinder head integration, ensuring flush and secure seating within the lock assembly.
  • OEM Replacement Compatibility: Direct replacement for legacy part numbers 576 3/8 and MR910-6, simplifying sourcing for maintenance and repair needs.
  • Satin Chrome Finish: Factory Satin Chrome finish coordinates with standard commercial hardware finishes for a cohesive, professional appearance.
  • Commercial-Grade Component: Classified as a commercial-grade cylinder replacement part within the Corbin Russwin parts and accessories product group.

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: 447F45
  • Features: Corbin Russwin Cylinder Parts

Typical Applications

  • Commercial Office Building Lock Maintenance and Repair
  • Educational Facility Door Hardware Servicing
  • Healthcare Institution Cylinder Assembly Replacement
  • Government and Municipal Building Hardware Upkeep
  • Hospitality Facility Lock Cylinder Refurbishment
  • Industrial and Warehouse Door Hardware Maintenance
  • Multi-Tenant Residential Property Hardware Repair

Why Corbin Russwin 447F45?

Corbin Russwin cylinder components are engineered to OEM standards, ensuring precise dimensional tolerances, such as the exact 0.172" collar depth, that are critical for proper cylinder function and security. The 447F45 Master Ring Cylinder Collar maintains the same specifications as the legacy 576 3/8 and MR910-6 parts, providing facilities managers and locksmiths with a reliable, directly interchangeable replacement for commercial-grade lock assemblies.

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:
447F45
Features:
Corbin Russwin Cylinder Parts

Corbin Russwin 447F45 626 – Frequently Asked Questions

1) Is the Corbin Russwin 447F45 the same part as the old 576 3/8 or MR910-6 collar?
Yes. The 447F45 master ring cylinder collar is the current reference for the parts previously catalogued as 576 3/8 and MR910-6, and it holds the same specifications, so it drops into the same cylinder assemblies those legacy numbers served.
2) What does a cylinder collar actually do, and is it the ring or the lock cylinder itself?
It's the ring, not the lock. The 447F45 is a collar that seats around a Corbin Russwin master ring cylinder head, filling the gap between the cylinder and the door or trim so the cylinder sits flush and secure in the assembly. It contains no pins, no keyway, and no key, so if the cylinder itself is worn or you need a rekey, you need a cylinder such as the Schlage 20-021 rim cylinder or a BEST 1C series core, not this collar.
3) What collar depth is the 447F45 and why does that number matter?
The 447F45 is a solid recessed collar measured at 0.172 inches deep. Collars are chosen by depth to take up the space between the cylinder head and the finished face, so an incorrect depth either leaves the cylinder standing proud or buries it and can interfere with how the cylinder operates. If your application needs a different spacing, you need a different collar depth in the same family, not this one.
4) Will the 447F45 collar fit a Schlage or BEST cylinder?
No. The 447F45 is built to Corbin Russwin master ring cylinder dimensions and is intended for compatible Corbin Russwin cylinder heads. Other makes use their own collar and cylinder geometry, so for a Schlage opening you would be working with parts like the 20-021 or 20-057 FSIC rim cylinder, and for BEST with the 1C or 1CB interchangeable core family. Match the collar to the cylinder brand.
5) Is the Corbin Russwin 447F45 a cylinder, or just the ring that goes around one?
The 447F45 is a Master Ring Cylinder Collar - a solid, recessed collar with a 0.172 inch depth in Satin Chrome that seats against the cylinder head. It contains no plug, pins, or keyway, so it cannot lock or be keyed on its own. If the keyed cylinder itself is what needs replacing, that is a different class of part: a mortise cylinder such as the Adams Rite 4036, or a rim cylinder such as the Schlage 20-021 with a vertical tailpiece cam.
6) I ordered the 447F45 and it will not fit my rim device - what should I have ordered?
The 447F45 is a collar for a Corbin Russwin cylinder head, not a rim cylinder, so it does not mount into a rim exit 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 cylinder with a horizontal tailpiece cam; the cam orientation is what matches the device. The BEST 12E Series dummy rim cylinder, at 1-5/32 inch diameter, covers an opening that needs the rim cylinder appearance without a working keyway.
7) What finish does the 447F45 collar come in, and will it match other hardware on the door?
One finish only: 626 satin chrome. That is the standard commercial brushed chrome tone, so it coordinates with satin chrome levers, mortise trim, and exit device hardware on the same opening. If the rest of your openings are brass or bronze, this collar will stand out and you should source the matching finish instead.
8) Does the 447F45 come with a key or cylinder, or is it the collar alone?
Collar alone. It is a single solid recessed ring for a master ring cylinder head, with no cylinder, core, or keys included. If you are rebuilding a cylinder assembly, plan on ordering the cylinder or core separately.
9) If I want to move the opening to an interchangeable core system instead of servicing Corbin Russwin parts, what are the options?
The 447F45 is a replacement part for existing Corbin Russwin cylinder assemblies, so it keeps the opening on the hardware already in the door. Converting to interchangeable core is a cylinder-level change: the BEST 1CB is a 150 Series interchangeable core cylinder, the BEST 1CDF is a drill-resistant patented 7-pin brass interchangeable core in the 150 Series, 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 the FSIC core itself in C keyway with a 643E Aged Bronze finish.
10) I need a keyed part for a knob or lever, not a collar - what takes the place of the 447F45 there?
The 447F45 only dresses the cylinder head; it does nothing inside a key-in-lever chassis. For that job the Falcon A23161-05 G is a key-in-lever cylinder in the RU/T Series with a 6-pin G keyway, keyed different with two cut keys. Kaba Ilco offers universal key-in-knob and lever cylinders as well, including the 1539 Series, the 1579 Series for Sargent, and the 1599 key-in-knob replacement cylinder.
11) For a deadbolt or handleset retrofit, is the 447F45 involved at all?
No - the 447F45 is a collar for commercial Corbin Russwin cylinder assemblies and carries no deadbolt function. Deadbolt and handleset retrofits are handled by purpose-built cylinders: the Medeco 1012040 is a 6-pin lazy motion rim cylinder for Kwikset single cylinder deadbolts, the 1065140 is a 5-pin retrofit for Arrow JL interconnected locks and Emtek handleset and deadbolt outside cylinders, the 1065244 is a 5-pin lazy motion rim type with an Emtek tailpiece, and the 1075127 is a 5-pin rim type lazy motion single cylinder for handlesets and deadbolts. The Kaba Ilco 1549 Series is a key-in-deadbolt cylinder.
12) My locksmith says the cylinder is fine but the key is worn - is the 447F45 the part to reorder?
Not for keying. The 447F45 is the collar, a non-keyed trim component with a 0.172 inch recessed depth in Satin Chrome. A worn or rekeyed plug is addressed at the core: the BEST 1C5 is a standard 5-pin cylinder core, and the Detex MC65 is a 1-1/8 inch 6-pin commercial mortise cylinder in Schlage C keyway if the whole mortise cylinder is being replaced.
13) Between the Adams Rite 4036 and the 447F45, which one goes in the door?
They are not alternates. The Adams Rite 4036 is a Grade 1 mortise cylinder in the 4036 Series with five-pin security and a 1/2 inch minimum door thickness, and it threads into the lock case as the keyed unit. The 447F45 is the Corbin Russwin collar that surrounds a cylinder head, 0.172 inch deep in Satin Chrome, and it is ordered alongside or after a cylinder rather than in place of one.
14) Is the 447F45 collar suitable for commercial buildings or just residential locks?
It is a commercial-grade Corbin Russwin cylinder replacement part, used for maintenance on office buildings, schools, healthcare and government facilities, hotels, warehouses, and multi-tenant residential properties. Property managers standardizing on Corbin Russwin cylinders can stock it as a routine repair item.
15) Why use the solid collar instead of a spacer or washer stack on a Corbin Russwin cylinder?
The 447F45 body is solid rather than assembled, which keeps a single fixed 0.172 inch depth under the cylinder head and avoids the loosening and rattle you get from stacked spacers. Its recessed profile is cut for the cylinder head so the head seats down into the collar instead of sitting on top of it.
How fast can I get the Corbin Russwin 447F45 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 447F45 626 come with a warranty?
Absolutely. The Corbin Russwin 447F45 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 447F45 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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