Schlage B520-361 Tailpiece Ret...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$16.84
Schlage B520-361 Tailpiece Retainer for FSIC Rim Cylinder

Schlage B520-361 Tailpiece Retainer for FSIC Rim Cylinder

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Model: B520-361

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

$16.84
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Schlage B520-361 Tailpiece Retainer for FSIC Rim Cylinder

The Schlage B520-361 is a purpose-built Tailpiece Retainer designed specifically for use with FSIC (Full Size Interchangeable Core) Rim Cylinders. This commercial-grade replacement part ensures proper retention and alignment of the tailpiece within compatible rim cylinder assemblies, maintaining reliable locking function in professional door hardware installations. Engineered to Schlage's exacting standards, the B520-361 is an essential component for maintaining the integrity of FSIC rim cylinder configurations in demanding commercial environments.

Key Features

  • FSIC Rim Cylinder Compatibility: Designed exclusively for use with Full Size Interchangeable Core (FSIC) Rim Cylinders, ensuring precise fit and reliable function within compatible assemblies.
  • OEM Replacement Part: A genuine Schlage component that meets original equipment specifications for accurate, drop-in replacement without modification.
  • Tailpiece Retention: Secures and retains the cylinder tailpiece in proper position, maintaining consistent mechanical engagement and dependable locking performance.
  • Commercial-Grade Construction: Built to Schlage's commercial standards for use in high-traffic professional applications where durability and reliability are essential.
  • Precise Fit: Manufactured to tight tolerances to match original Schlage rim cylinder geometry, supporting correct alignment and smooth cylinder operation.
  • Part of Schlage's Parts and Accessories Portfolio: Sourced directly as a Schlage-certified part, supporting serviceability and longevity of existing FSIC rim cylinder installations.

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: B520-361
  • Features: Schlage 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 Schlage B520?

Schlage cylinder components are engineered to maintain performance standards across demanding commercial applications, with each replacement part manufactured to match original design specifications. The B520-361 Tailpiece Retainer upholds the dependability that commercial door hardware installations require, making it the correct choice when servicing or restoring FSIC rim cylinder assemblies in professional settings.

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:
B520-361
Features:
Schlage Parts

Schlage B520-361 – Frequently Asked Questions

1) What exactly is the Schlage B520-361 part, a cylinder or just a component?
The B520-361 is not a cylinder. It is the tailpiece retainer, the small component that holds the tailpiece in position inside a Schlage FSIC (full size interchangeable core) rim cylinder housing. If you need the complete rim cylinder, this is not the part to order; if you are rebuilding or servicing a rim cylinder whose tailpiece will not stay seated, this is the piece.
2) My exit device rim cylinder keeps losing engagement with the latch. Is the retainer the fix?
Often, yes. The retainer's only job is holding the tailpiece in correct position inside the FSIC rim cylinder so mechanical engagement stays consistent. If the tailpiece is backing out or wandering, replacing the B520-361 restores that alignment. If the tailpiece itself is bent, worn, or the wrong length for your device, a retainer will not correct it and you need the correct tailpiece or a complete rim housing.
3) What should be used if the door takes a mortise cylinder rather than a rim cylinder?
The Schlage B520-361 tailpiece retainer serves FSIC rim cylinder assemblies, so it has no application in a mortise prep. For mortise openings, the Corbin Russwin 1000 Series is a Grade 1 mortise cylinder in 1-1/2 inch length with an A02 straight cam, the Corbin Russwin 1070 is a 1-1/4 inch 6-pin mortise housing with an A01 cloverleaf cam, and the Detex MC65 is a 1-1/8 inch 6-pin mortise cylinder in the Schlage C keyway.
4) Can a complete rim cylinder be ordered instead of just the Schlage B520-361 tailpiece retainer?
Yes. The Schlage B520-361 is a tailpiece retainer only, a replacement part for FSIC rim cylinder assemblies, so it does not include a cylinder housing or core. If the housing itself is worn or the opening needs a whole new rim cylinder, the Corbin Russwin 3070 is a 6-pin rim cylinder housing supplied with a 1-7/8 inch tailpiece, and the BEST 12E Series dummy rim cylinder measures 1-5/32 inch in diameter for openings where no keyed function is needed.
5) Is an interchangeable core the same thing as the Schlage B520-361?
No. The B520-361 is the retainer that holds the tailpiece in position inside an FSIC rim cylinder housing; it is not a keyed core and carries no keyway or pinning. The core that drops into that style of housing is a separate item, such as the BEST 1C Series standard 5-pin cylinder core, the BEST Peaks 1CB 150 Series interchangeable core, or the BEST 1CDF drill-resistant 7-pin brass core.
6) Is this a genuine Schlage part or an aftermarket copy?
Genuine Schlage. The B520-361 is an OEM replacement part built to original Schlage specification, so it drops into a matching Schlage FSIC rim cylinder housing without filing or modification. That matters on a service call where a generic retainer can sit loose and let the tailpiece drift out of engagement.
7) Do I need a keyed core or key blanks along with this retainer?
No keys or core come with a tailpiece retainer, and none are required to install it. If the job also calls for a replacement interchangeable core, options include the BEST 1C Series standard 5-pin core, the 1CB 150 Series interchangeable core, or the drill-resistant 1CDF 7-pin core.
8) Can I standardize this part across a whole building's FSIC rim cylinders?
Yes, provided the cylinders are Schlage FSIC rim units. The B520-361 is the single retainer Schlage specifies for that configuration, so one part number covers every matching rim cylinder in the facility, which keeps the maintenance shelf simple for a school district or hospital running one keying system.
9) Will the Schlage B520-361 work on an Adams Rite storefront deadlock?
No. The B520-361 is a Schlage OEM part built to Schlage FSIC rim cylinder geometry and sold as a commercial replacement component. Adams Rite MS1847 deadlock and deadlatch systems are served by their own trim, including the 4024 cylinder pull with trim plate mounting and the 4025 five pin tumbler cylinder pull with through-screws; the Adams Rite 4026 five pin tumbler cylinder pull is instead for the 5017 wood door deadlock, and the Adams Rite 4036 is a Grade 1 five-pin mortise cylinder with a 1/2 inch minimum door thickness.
10) For a residential handleset or deadbolt that needs a rim-type cylinder, is the Schlage B520-361 the right part?
No. The B520-361 is a commercial FSIC rim cylinder retainer, not a keyed rim cylinder for residential locks. For those openings the Medeco 1075127 is a 5-pin rim type lazy motion single cylinder for handlesets and deadbolts, the Medeco 1012040 is a 6-pin lazy motion rim cylinder for Kwikset single cylinder deadbolts, and the Medeco 1065244 is a 5-pin lazy motion rim type cylinder supplied with an Emtek tailpiece.
11) If the failure is in a key-in-knob or key-in-lever cylinder rather than a rim cylinder, what replaces it?
The Schlage B520-361 addresses tailpiece retention in FSIC rim cylinder assemblies only. A knob or lever cylinder is a different part: 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 locks, 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 and two cut keys. For a key-in-deadbolt, the Kaba Ilco 1549 Series applies.
12) Is there an equivalent part for keeping Schlage L9000 mortise locks on one key system?
The B520-361 is a service part for FSIC rim cylinder assemblies and does not affect keying. If the goal is putting a large format interchangeable core into Schlage L9000 mortise locks, the Corbin Russwin 1080 Series is a 1-1/2 inch LFIC mortise cylinder, 6-pin, listed for Schlage L9000 mortise locks with an A01 cloverleaf cam.
13) Is the Schlage B520-361 suitable for commercial buildings or is it a residential part?
It is a commercial part. Schlage classes the B520-361 as commercial-grade, intended for high-traffic professional openings, and it shows up in office buildings, schools, hospitals, government facilities, retail, warehouses, and multi-tenant residential where FSIC rim cylinders are already in service.
14) What is the difference between the Schlage B520-361 and a retrofit cylinder like the Medeco 1065140?
The Schlage B520-361 restores an existing Schlage FSIC rim cylinder by holding its tailpiece in the correct position, with no change to the lock it serves. The Medeco 1065140 is a complete 5-pin retrofit cylinder for Arrow JL interconnected locks and as the outside cylinder on Emtek handlesets and deadbolts, so it swaps the cylinder itself. The Emtek CY4 is likewise a standalone cylinder sold each.
How fast can I get the Schlage B520-361 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 Schlage B520-361 come with a warranty?
Absolutely. The Schlage B520-361 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 Schlage B520-361?
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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