Medeco 20200A1 6-Pin Key-in-Kn...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$179.00
$149.95
Medeco Medeco 20200A1- 6 Pin Cylinder Package for Arrow MK Series MED-20200A1

Medeco 20200A1 6-Pin Key-in-Knob/Lever Retrofit Cylinder for Arrow MK Series

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Model: 20200A1T-26-DLT
$179.00
$149.95
Selected Finish is

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

$179.00
$149.95
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Medeco 20200A1 6-Pin Key-in-Knob/Lever Retrofit Cylinder for Arrow MK Series

The Medeco 20200A1 is a 6-pin Key-in-Knob/Lever retrofit cylinder engineered to replace cylinders in knob-type cylindrical locksets, lever-type cylindrical locksets, padlocks, and bored-type auxiliary deadlatches and deadlocks — including the Arrow MK Series. Constructed of durable machined brass components, this cylinder delivers the high-security performance Medeco is known for, with ANSI A156.30 Level A certification for patent-protected key control and ANSI A156.5 Grade 1 certification for consistent quality in heavy-use commercial applications. The Medeco 4 (M4) platform is UL437 listed for drill and pick resistance, making it a trusted choice for demanding security environments.

Key Features

  • 6-Pin Cylinder Configuration: Features a 6-pin tumbler design for enhanced security and key control in commercial-grade applications.
  • Retrofit Compatibility: Designed to retrofit knob-type cylindrical locksets, lever-type cylindrical locksets, padlocks, and bored-type auxiliary deadlatches and deadlocks, including the Arrow MK Series.
  • UL437 Listed (M4): Medeco 4 (M4) Key-in-Knob cylinders are UL437 listed for drill and pick resistance, providing verified protection against forced entry.
  • Patent-Protected Key Control: ANSI A156.30 Level A certification assures patent-protected key control and physical strength (M4, M3), limiting unauthorized key duplication.
  • Heavy-Use Grade 1 Quality: ANSI A156.5 Grade 1 certification assures consistent quality and performance for heavy-use commercial applications (M4/M4 BiLevel, M3).
  • Durable Machined Brass Construction: Cylinders are constructed of durable machined brass components for long-lasting reliability in high-traffic commercial environments.
  • Broad Finish Selection: Available in 14 finishes including Bright Brass (05), Satin Brass (06), Antique Brass (09), Satin Brass Blackened (10), Bright Bronze (11), Satin Bronze (12), Oil Rubbed Bronze (13), Bright Nickel (18), Satin Nickel (19), Antique Nickel (20), Black (22), Dark Bronze (24), Bright Chrome (25), and Satin Chrome (26).
  • Industry-Leading Retrofit Range: Medeco offers over 100 different cylinder designs and tailpiece configurations, enabling the largest retrofit capability in the industry and reducing the need for complete lockset replacements.

Certifications & Compliance

  • UL437 Listed — Drill and Pick Resistance (Medeco 4 / M4)
  • ANSI A156.30 Level A — Patent-Protected Key Control and Physical Strength (M4, M3)
  • ANSI A156.5 Grade 1 — Heavy-Use Commercial Quality (M4/M4 BiLevel, M3)

Technical Specifications

  • Product Family: Key-in-Knob/Lever Cylinder
  • Pinning: 6-Pin
  • Compatible Hardware: Arrow MK Series
  • Certification: UL 437 Listed; ANSI/BHMA A156.30 (M4); ANSI/BHMA A156.5 Grade 1 (M4)
  • Construction: Durable machined brass components
  • Warranty: 2-year manufacturer's warranty

Typical Applications

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

Why Medeco?

Medeco Key-in-Knob/Lever cylinders are built from durable machined brass components and backed by UL437 listing for drill and pick resistance, along with ANSI A156.30 Level A and ANSI A156.5 Grade 1 certifications. With over 100 cylinder designs and tailpiece configurations available, Medeco delivers the industry's broadest retrofit capability — minimizing full lockset replacements while maximizing security and key control in commercial door hardware applications.

Manufacturer Resources

Medeco Product Catalog

Product Specs

Product Group:
Parts and Accessories
Series:
20200A1
Product Subgroup:
Cylinders
Product Type:
Key-in-Knob/Lever Cylinder
Commercial/Residential:
Commercial
Subcategory:
Cylinders
Package Qnty:
No
Cylinder Classification:
6Pin
Product Category:
Parts and Accessories
Department:
Door Hardware

Medeco 20200A1T-26-DLT – Frequently Asked Questions

1) Will the Medeco 20200A1 cylinder fit an Arrow MK Series lockset?
Yes. The 20200A1 is a 6-pin key-in-knob/lever retrofit cylinder built specifically to drop into Arrow MK Series cylindrical locks. It also retrofits other knob-type and lever-type cylindrical locksets, padlocks, and bored-type auxiliary deadlatches and deadlocks, so you upgrade key control without replacing the whole lockset.
2) What do I have to specify when ordering a Medeco 20200A1 cylinder?
Three choices. Keyway platform: Biaxial or M3. Pinning state: Pinned, Sub-Assembled, or Sub-Assembled No Slider. And finish, from 13 options including 605 Bright Brass, 606 Satin Brass, 613 Dark Bronze Oil-Rubbed, 619 Satin Nickel, 622 Flat Black, 626 Satin Chrome and others. If you are keying it into an existing Medeco system on site, a locksmith will usually want the sub-assembled version to pin to the master key schedule.
3) What is the difference between the Biaxial and M3 versions of this Medeco cylinder?
They are different Medeco keyway platforms, and the one you order has to match the key system already in your building. Biaxial and M3 keys are not interchangeable with each other. If you are adding doors to an existing Medeco master key system, order the platform that system was set up on; if you are starting fresh, pick one platform and standardize the whole facility on it.
4) Is this Medeco retrofit cylinder high security, and does it carry a UL listing?
Yes. The Medeco 4 (M4) key-in-knob platform is UL437 listed for drill and pick resistance, holds ANSI A156.30 Level A for patent-protected key control and physical strength, and ANSI A156.5 Grade 1 for heavy-use commercial service. That combination is what most institutional specs mean when they call for a high-security cylinder.
5) Can I upgrade security on my existing knobs and levers without buying new locks?
That is exactly what the 20200A1 is for. It swaps the cylinder out of knob-type and lever-type cylindrical locksets, including Arrow MK Series, and leaves the lock body, chassis and trim in place. Medeco publishes over 100 cylinder designs and tailpiece configurations across the line, which is why most existing hardware can be converted rather than replaced. For a property manager with mixed hardware, that means one key system across the building without a full hardware change-out.
6) Can keys for this cylinder be copied at a hardware store?
No. The Medeco 20200A1 uses patent-protected keys under ANSI A156.30 Level A key control, so blanks are restricted and duplication is limited to authorized channels. That is the main reason facilities with tenant turnover, drug storage, or IT and utility rooms specify it over a standard cylinder.
7) Will this cylinder hold up on a high-traffic commercial door?
It is built for it. The cylinder body uses machined brass components and carries ANSI A156.5 Grade 1, the heavy-use commercial rating, and the catalog classifies it as a commercial product rather than residential. Typical placements are office buildings, schools, healthcare, retail, government facilities, warehouses, and multi-tenant residential.
8) How many pins does the Medeco 20200A1 have, and does that matter for my master key system?
Six pins. A 6-pin chamber gives more usable key changes and deeper master keying levels than a 5-pin cylinder, which matters when you are building a system with grand master, master, and sub-master levels across a facility. Order the sub-assembled version if your locksmith is pinning to an existing schedule.
9) Can I match this cylinder to the finish of my existing Arrow lever trim?
Most likely. Thirteen finishes are offered: 20 Antique Nickel, 605 Bright Brass, 606 Satin Brass, 609 Antique Brass, 611 Bright Bronze, 612 Satin Bronze, 613 Dark Bronze Oil-Rubbed, 618 Bright Nickel, 619 Satin Nickel, 622 Flat Black, 624 Dark Bronze, 625 Bright Chrome, and 626 Satin Chrome. Satin chrome 626 and satin nickel 619 are the two most commonly specified on commercial lever hardware.
10) What does Sub-Assembled, No Slider mean on a Medeco cylinder order?
It is a cylinder shipped unpinned and without the slider component installed, for a locksmith who is building the cylinder to a specific key system in the shop. Pinned means it arrives keyed and ready to install. Sub-Assembled sits between the two. Order Pinned if you want it working out of the box; order one of the sub-assembled options if your locksmith controls the keying.
How fast can I get the Medeco 20200A1T-26-DLT 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 Medeco 20200A1T-26-DLT come with a warranty?
Absolutely. The Medeco 20200A1T-26-DLT 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 Medeco 20200A1T-26-DLT?
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 Medeco 20200A1T-26-DLT from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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