Arrow 550CR-44-201 Tailpiece P...
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Arrow 550CR-44-201 Tailpiece Pack for MK Series SFIC 6 and 7-Pin Cylinders

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Model: 550CR-44-201

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

$20.28
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Arrow 550CR-44-201 Tailpiece Pack for MK Series SFIC 6 and 7-Pin Cylinders

The Arrow 550CR-44-201 Tailpiece Pack is a commercial-grade replacement component engineered specifically for use with Arrow MK Series Small Format Interchangeable Core (SFIC) cylinders in both 6-pin and 7-pin configurations. Designed as a precision replacement part for Arrow cylinder systems, this tailpiece pack ensures continued reliable mechanical operation of compatible locking hardware. Intended for commercial applications where maintaining the integrity of existing Arrow MK Series cylinder installations is essential.

Key Features

  • MK Series SFIC Compatibility: Engineered specifically for Arrow MK Series Small Format Interchangeable Core cylinders, ensuring a precise and reliable fit.
  • 6 and 7-Pin Configuration Support: Compatible with both 6-pin and 7-pin cylinder arrangements, offering flexibility across a range of Arrow cylinder installations.
  • Commercial-Grade Replacement Part: Manufactured to Arrow's commercial standards as a genuine replacement component for maintaining existing cylinder systems.
  • Genuine Arrow Component: Sourced directly from Arrow's parts and accessories line, ensuring compatibility and quality consistent with original equipment.
  • Maintains System Integrity: Restores proper mechanical function to Arrow MK Series SFIC cylinder installations without requiring full cylinder replacement.

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: 550CR-44-201
  • Features: Arrow Parts

Typical Applications

  • Commercial Office Buildings with Arrow MK Series SFIC Locking Systems
  • Educational Facilities Maintaining Existing Arrow Cylinder Installations
  • Healthcare Institutions Servicing Arrow Mechanical Lock Hardware
  • Government and Municipal Buildings with Arrow Master Keyed Systems
  • Multi-Tenant Residential and Commercial Properties Using Arrow SFIC Cylinders
  • Industrial and Warehouse Facilities with Arrow Cylinder-Based Access Points
  • Retail Establishments Requiring Arrow Cylinder Component Replacement

Why Arrow 550CR-44-201?

Arrow's 550CR-44-201 Tailpiece Pack delivers genuine OEM-quality replacement components designed to restore and maintain the mechanical performance of MK Series SFIC cylinder installations. As a commercial-rated Arrow parts and accessories product, it provides facilities managers and locksmiths with a reliable, compatible solution for servicing Arrow cylinder hardware without the cost of full cylinder replacement.

Manufacturer Resources

Arrow Express Catalog

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:
550CR-44-201
Features:
Arrow Parts

Arrow 550CR-44-201 – Frequently Asked Questions

1) Can I use this Arrow tailpiece on a BEST or Falcon interchangeable core?
No. The 550CR-44-201 is specified for Arrow MK Series SFIC cylinders only. If you are servicing a BEST small format core, look at BEST's own core line such as the 1C Series 5-pin core or the 1CB 150 Series interchangeable core rather than an Arrow tailpiece.
2) Do I have to replace the whole Arrow SFIC cylinder if the tailpiece is worn or broken?
No. The tailpiece is the driver bar that transfers key rotation from the core to the lock mechanism, and Arrow sells it as a standalone replacement pack. Swapping the 550CR-44-201 restores mechanical operation to an MK Series SFIC housing without buying a new cylinder or rekeying anything.
3) I need a rim cylinder with a tailpiece, not just the tailpiece. What should I order instead of the Arrow 550CR-44-201?
The Arrow 550CR-44-201 is only the tailpiece pack for Arrow MK Series SFIC cylinders, so it does not include a cylinder body. For a complete rim cylinder, the Schlage 20-021 is a 6-pin rim cylinder with a vertical tailpiece cam and two keys, and the Schlage 20-022 is the same 6-pin rim cylinder with a horizontal tailpiece cam. If the opening uses an interchangeable core, the Schlage 20-057 is a 6-pin FSIC rim cylinder with a convertible tailpiece cam. The Corbin Russwin 3070 is a 6-pin rim cylinder housing supplied with a 1-7/8 inch tailpiece.
4) Will the Arrow 550CR-44-201 tailpiece pack work with a BEST small format interchangeable core?
The Arrow 550CR-44-201 is a replacement tailpiece pack built for Arrow MK Series small format interchangeable core cylinders in 6-pin and 7-pin configurations, so it is specified against Arrow MK housings. If the opening uses BEST interchangeable cores, the core itself is the item to order: the BEST 1C Series standard 5-pin cylinder core and the BEST Peaks 1CB 150 Series interchangeable core cylinder are both cataloged cores, and the BEST 1CDF is a drill resistant patented 7-pin brass core in the 150 Series. Those are complete cores rather than a tailpiece service part.
5) My Arrow lock is a JL interconnected lock, not an MK SFIC cylinder. Is the 550CR-44-201 the right part?
No. The Arrow 550CR-44-201 tailpiece pack is engineered for Arrow MK Series small format interchangeable core cylinders in 6-pin and 7-pin arrangements. For an Arrow JL interconnected lock, the Medeco 1065140 is a 5-pin retrofit cylinder listed for the Arrow JL interconnected lock as well as Emtek handleset and deadbolt outside cylinder applications, and it replaces the cylinder rather than servicing a tailpiece.
6) Will changing this tailpiece affect my master key system?
No. A tailpiece is purely mechanical drive hardware, not a keyed component, so the pinning and keying of your Arrow MK Series cores are untouched. You keep the same master key hierarchy and the same cores; only the drive bar changes.
7) How many part numbers do I need to order to cover both my 6-pin and 7-pin Arrow cores?
One. The 550CR-44-201 ships as a single orderable item that covers both 6-pin and 7-pin MK Series SFIC configurations, which simplifies stocking a service truck or a maintenance shop that runs mixed pinning across a portfolio.
8) What is the mortise equivalent if my Arrow cylinder is a mortise cylinder rather than an SFIC?
The Arrow 550CR-44-201 tailpiece pack serves small format interchangeable core cylinders, which use a tailpiece rather than a cam. Mortise cylinders drive the lock through a cam instead. The Corbin Russwin 1000 Series is a Grade 1 mortise cylinder at 1-1/2 inch length with an A02 straight cam, and the CR1070 is a Grade 1 1-1/4 inch 6-pin mortise housing with an A01 cloverleaf cam. The Corbin Russwin 1080 is a 1-1/2 inch LFIC 6-pin mortise cylinder for Schlage L9000 mortise locks. 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.
9) Is a Kaba Ilco replacement cylinder a substitute for the Arrow 550CR-44-201?
They solve different problems. The Arrow 550CR-44-201 is a replacement tailpiece pack that restores mechanical function to an existing Arrow MK Series SFIC cylinder without replacing the cylinder. The Kaba Ilco line replaces the cylinder itself: the 1539 Series is a key-in-knob and lever universal cylinder, the 1599 is a key-in-knob replacement cylinder, the 1549 is a key-in-deadbolt cylinder, and the 1579 is a knob and lever cylinder for Sargent. Choose the Ilco route when the cylinder plug is the failed part, and the Arrow tailpiece pack when the cylinder is sound.
10) I need a lazy motion tailpiece cylinder for a deadbolt. Does the Arrow 550CR-44-201 cover that?
No. The Arrow 550CR-44-201 is a tailpiece pack for Arrow MK Series SFIC cylinders in commercial installations. For deadbolt and handleset applications that call for a lazy motion tailpiece, the Medeco 1012040 is a 6-pin lazy motion rim cylinder for Kwikset single cylinder deadbolts, the Medeco 1075127 is a 5-pin rim type lazy motion single cylinder for handlesets and deadbolts, and the Medeco 1065244 is a 5-pin rim lazy motion cylinder supplied with an Emtek tailpiece.
11) My opening is an aluminum storefront with an Adams Rite deadlock. What do I order instead of the Arrow 550CR-44-201?
The Arrow 550CR-44-201 tailpiece pack is matched to Arrow MK Series SFIC cylinders and is not an Adams Rite part. For an Adams Rite MS1847 deadlock or deadlatch, the Adams Rite 4024 cylinder pull mounts with a trim plate and the 4025 is a five pin tumbler cylinder pull with through-screws, both designed for the MS1847. For a wood door running the Adams Rite 5017 deadlock or deadlatch, the 4026 five pin tumbler cylinder pull is the matching part.
12) What is the difference between ordering the Arrow 550CR-44-201 and ordering a complete interchangeable core?
The Arrow 550CR-44-201 supplies the tailpiece for Arrow MK Series SFIC housings in 6-pin and 7-pin configurations, keeping the existing cylinder and keying in service. A complete core changes the keying and the plug together: the BEST 1C Series is a standard 5-pin core, the BEST 1CB is a 150 Series interchangeable core, and the Schlage 20-057-C is a full size interchangeable core in the C keyway with a 643E aged bronze finish. Use the Arrow tailpiece pack when only the drive component needs service.
13) Is the Arrow 550CR-44-201 tailpiece pack a commercial part or a residential one?
Commercial. It is built to Arrow's commercial standards for MK Series SFIC hardware, the kind of interchangeable core system used in offices, schools, healthcare facilities and master keyed municipal buildings where cores get swapped rather than locks replaced.
14) Is the Arrow 550CR-44-201 a genuine Arrow part or an aftermarket copy?
It is a genuine Arrow component from Arrow's own parts and accessories line, so it matches original equipment fit and finish on MK Series SFIC cylinders.
15) Does the Arrow 550CR-44-201 fit a Falcon key-in-lever cylinder?
It does not. The 550CR-44-201 tailpiece pack is engineered specifically for Arrow MK Series small format interchangeable core cylinders. Falcon key-in-lever hardware takes its own cylinder: the Falcon A23161-05 G is a key in lever cylinder for the RU/T Series with a 6-pin G keyway, keyed different and supplied with two cut keys.
16) For a door that needs the look of a cylinder but no keyed function, is the Arrow 550CR-44-201 involved?
No. The Arrow 550CR-44-201 is a functional replacement tailpiece for Arrow MK Series SFIC cylinders and is used where keyed operation must be restored. Where an opening needs a non-functioning cylinder for appearance or to fill a prep, the BEST 12E Series dummy rim cylinder with a 1-5/32 inch diameter is the item built for that purpose.
How fast can I get the Arrow 550CR-44-201 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 Arrow 550CR-44-201 come with a warranty?
Absolutely. The Arrow 550CR-44-201 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 Arrow 550CR-44-201?
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
Why buy the Arrow 550CR-44-201 from ZenSupply?
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