Dorma 7421 BTS Center Hung Bot...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$121.00
$76.60
Dormakaba Dorma 7421 BTS Center Hung Bottom Arm for Wood And Steel Doors 7421

Dorma 7421 BTS Center Hung Bottom Arm for Wood And Steel Doors

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Model: 7421

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

$121.00
$76.60
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Dorma 7421 BTS Center Hung Bottom Arm for Wood And Steel Doors

Manufacturer Resources

Product Specs

Subcategory:
Door Closer Parts & Accessories
Commercial/Residential:
Commercial
Product Type:
Closer Arms
Hang Type:
Center Hung
Product Group:
Door Controls
Product Subgroup:
Parts and Accessories
Parts and Accessories Type:
Replacement Parts
Product Attribute:
Parts and Accessories
Product Model:
7421
Product Category:
Door Controls
Department:
Door Hardware

Dormakaba 7421 – Frequently Asked Questions

1) What is the Dorma 7421 bottom arm used for on a BTS floor closer installation?
The 7421 is a replacement bottom arm for Dorma BTS center hung floor closer installations, and it works on both wood and steel doors. It is the part that connects the door to the closer spindle at the floor. Buy it when you are rebuilding or repairing an existing center hung floor closer opening rather than replacing the whole closer.
2) Will the Dorma 7421 arm work on an offset pivot or butt hung door?
No. The 7421 is a center hung bottom arm, so it suits doors pivoting on the door's centerline over a floor closer. An offset pivot or butt hung opening uses different bottom hardware, and the arm geometry will not line up. Confirm the existing opening is center hung before ordering this one.
3) Do I get the whole floor closer with the Dorma 7421, or just the arm?
Just the arm. The 7421 is a replacement bottom arm only, not a complete BTS floor closer and not a cement case. If your closer body itself has failed, you need the closer unit, not this part.
4) Can I use the Dorma 7421 bottom arm on a wood door, or is it steel only?
Both. The 7421 bottom arm is made for wood and steel doors, so a property manager standardizing across a lobby with mixed door materials can use the same part on either.
5) How do I order the Dorma 7421 bottom arm, are there handing or finish options to specify?
There is one configuration of the 7421 bottom arm, ordered as model 7421. No handing, size or finish choice is made at order time, which makes it a straightforward reorder for a maintenance shop restocking BTS center hung parts.
6) Is the Dorma 7421 a commercial-duty part or is it for residential doors?
Commercial. The 7421 bottom arm is a commercial door control part, intended for center hung floor closer openings of the kind found in storefronts, lobbies and institutional entrances rather than residential use.
How fast can I get the Dormakaba 7421 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 7421 come with a warranty?
Absolutely. The Dormakaba 7421 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 7421?
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 7421 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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