Dormakaba AF8MJ 8600/8900 Seri...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$159.00
$105.85
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Dormakaba AF8MJ 8600/8900 Series Door Closer Arm, Flat Complete, Non-Hold Open with MJ Bracket

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Model: AF8MJ 689

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

$159.00
$105.85
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Dormakaba AF8MJ 8600/8900 Series Door Closer Arm, Flat Complete, Non-Hold Open with MJ Bracket

The Dormakaba AF8MJ is a flat complete door closer arm designed for non-hold open applications within the 8600 and 8900 Series door closer families. Engineered for commercial use, this replacement arm is specifically configured for use with the MJ Bracket, ensuring precise fit and reliable operation as part of an authorized Dormakaba parts system. Ideal for facilities requiring a dependable, drop-in replacement arm that maintains the integrity of the original door closer installation.

Key Features

  • Series Compatibility: Designed specifically for Dormakaba 8600 and 8900 Series door closers for assured fit and performance.
  • MJ Bracket Integration: Configured exclusively for use with the MJ Bracket, enabling secure and accurate mounting in compatible installations.
  • Non-Hold Open Configuration: Flat complete arm in a non-hold open design ensures controlled door closing for code-compliant and safety-conscious applications.
  • Flat Complete Arm Assembly: Supplied as a complete flat arm assembly, simplifying replacement and reducing installation time.
  • Commercial-Grade Construction: Built to the demanding standards of Dormakaba's commercial door hardware line, supporting high-traffic environments.
  • Authorized Replacement Part: Genuine Dormakaba replacement component maintaining original equipment performance and compatibility.

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: Door Closer Arms
  • Parts and Accessories Type: Replacement Parts
  • Commercial/Residential: Commercial
  • Product Model: AF8MJ

Typical Applications

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

Why Dormakaba AF8MJ?

Dormakaba door closer arms deliver professional-grade reliability as genuine replacement components engineered for direct compatibility with the 8600 and 8900 Series closer families. The AF8MJ's flat complete, non-hold open design ensures controlled, code-conscious door operation in demanding commercial environments where consistent performance is essential.

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:
Door Closer Arms
Parts and Accessories Type:
Replacement Parts
Commercial/Residential:
Commercial
Product Model:
AF8MJ
Features:
Dorma Door Closer Parts & Accessories

Dormakaba AF8MJ 689 – Frequently Asked Questions

1) Will the Dormakaba AF8MJ arm fit my 8600 or 8900 Series door closer?
Yes. The AF8MJ flat complete arm is built for the Dormakaba 8600 and 8900 Series closer bodies. One condition: it is configured for use with the MJ bracket, so the mounting on your opening has to be the MJ bracket arrangement. If your closer uses a different bracket or shoe, this arm assembly is not the right part number.
2) Does the AF8MJ door closer arm hold the door open?
No. It is a non-hold open arm, so the closer will pull the door shut every cycle. That is what you want on a fire rated opening or anywhere a door is not permitted to stand open. If the door needs to stay propped, you need a hold open arm instead, not this one.
3) Is the AF8MJ a complete arm assembly or do I need to order the forearm separately?
It ships as a flat complete arm assembly, meaning the main arm and forearm come together as one unit. You are replacing the whole arm in one part number rather than sourcing pieces. The MJ bracket itself is a separate item, so if yours is damaged or missing you will need to order that too.
4) What finish does the Dormakaba AF8MJ closer arm come in?
Aluminum, finish code 689. That is the standard painted aluminum finish on commercial closers, so it will match existing 689 closer bodies and arms on the rest of your openings. It is the only finish offered for this arm.
5) Is the AF8MJ a genuine Dormakaba part or an aftermarket arm?
Genuine Dormakaba. It is an authorized replacement component from the Dorma door closer parts line, so the geometry and closing performance match the original arm that came on the 8600 or 8900 Series closer. That matters on a closer arm, because an off-spec arm length changes the sweep and the backcheck behavior.
6) My door closer arm is bent but the closer body still works. Can I just replace the arm?
Yes, that is exactly what the AF8MJ is for. It is sold as a drop-in replacement arm so you keep the existing 8600 or 8900 Series closer body and swap only the arm, which cuts the labor compared with pulling and re-prepping a whole closer. Confirm the existing setup uses the MJ bracket before ordering, since this arm is configured for that bracket.
7) Is this arm rated for a high traffic commercial door, or is it a residential part?
Commercial. The AF8MJ is part of Dormakaba's commercial door hardware line and is intended for high-traffic openings: office buildings, schools, hospitals, retail, warehouses, multi-tenant residential corridors, and municipal buildings. It is not a light-duty residential arm.
How fast can I get the Dormakaba AF8MJ 689 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 Dormakaba AF8MJ 689 come with a warranty?
Absolutely. The Dormakaba AF8MJ 689 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 Dormakaba AF8MJ 689?
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 Dormakaba AF8MJ 689 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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