BEST DST Door Closer Cushion A...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$331.00
$222.70
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BEST DST Door Closer Cushion Arm with Thumb Turn, Hold Open and Parallel Mount for 7000 and 8000 Series

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Model: DST 689

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

$331.00
$222.70
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BEST DST Door Closer Cushion Arm with Thumb Turn, Hold Open and Parallel Mount for 7000 and 8000 Series

The BEST DST is a complete door saver cushion arm assembly designed for commercial applications requiring reliable hold-open functionality and door protection. This parallel-mount arm features an integrated thumb turn mechanism for convenient hold-open operation and is compatible with BEST 7000 and 8000 Series door closers. Engineered as a complete replacement arm assembly, the DST delivers professional-grade performance in demanding commercial environments.

Key Features

  • Door Saver Cushion Design: Integrated cushion arm construction helps protect the door and adjacent surfaces from impact damage during operation.
  • Thumb Turn Hold Open: Convenient thumb turn mechanism allows doors to be held open without additional tools or props, supporting flexible traffic flow management.
  • Parallel Mount Configuration: Parallel mount design provides a low-profile installation ideal for applications where standard slide-track or regular arms are not suitable.
  • Series Compatibility: Designed specifically for use with BEST 7000 and 8000 Series door closers, ensuring proper fit and reliable operation.
  • Complete Assembly: Supplied as a complete arm assembly, providing all necessary components for a straightforward replacement or upgrade installation.
  • Commercial Grade: Built for commercial applications where consistent, long-term performance is required across high-traffic door 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: Door Closer Arms
  • Parts and Accessories Type: Replacement Parts
  • Commercial/Residential: Commercial
  • Product Model: DST

Typical Applications

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

Why BEST DST?

The BEST DST arm assembly is purpose-built for compatibility with BEST 7000 and 8000 Series closers, delivering a complete, ready-to-install solution with integrated door saver cushion and thumb turn hold-open functionality. Its parallel mount configuration and commercial-grade construction make it a dependable choice for facility managers and installers seeking reliable door closer arm replacement in high-traffic environments.

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:
DST
Features:
Dorma Door Closer Parts & Accessories

BEST DST 689 – Frequently Asked Questions

1) Will the BEST DST arm fit my door closer, or is it only for certain BEST closers?
The DST cushion arm is built for BEST 7000 and 8000 Series door closers. It is a complete replacement arm assembly for those bodies, so if the closer on your door is another series or another brand, this arm is not the part to order.
2) Is the BEST DST a parallel arm or a regular (top jamb / pull side) arm?
Parallel mount only. The DST mounts on the push side with the arm running parallel to the door face, which keeps the installation low profile. If your opening is set up for a regular arm or a slide track, this arm will not go back on the same prep.
3) Can I use a hold-open arm like the DST on a fire door?
Mechanical hold-open arms are not used on fire-rated openings, which must be free to close and latch; those doors take a non-hold-open closer, or an electromagnetic hold-open tied to the fire alarm. Use the DST on non-rated commercial doors where holding the leaf open is wanted.
4) What does the thumb turn on this cushion arm actually do?
It is the hold-open control. A turn of the thumb turn holds the door open at the set point so staff can move carts or deliveries through, and turning it back releases the door to close normally. No wedges or props needed.
5) What is a cushion arm and do I need one on this opening?
A cushion (door saver) arm has a built-in stop in the arm that absorbs the swing near full open, protecting the door, the closer, and the wall behind it. It is worth specifying on openings with no wall stop or where wind and heavy traffic slam the door. On openings that already have a floor or wall stop, a plain parallel arm does the job.
6) Do I get everything needed to swap the arm, or do I have to order parts separately?
It ships as a complete arm assembly, catalogued as a replacement part, so the components for the arm changeover come together. You reuse the existing closer body on the door.
7) What finish does the BEST DST arm come in?
One finish: 689 aluminum painted. That is the standard sprayed aluminum look used across most commercial closers, so it blends with existing 689 closer bodies and arms elsewhere in a building. If your openings are standardized on a plated or dark bronze finish, the arm will not match.
8) Is this arm rated for high-traffic commercial doors or is it a residential part?
Commercial. The DST is intended for high-traffic commercial openings, the kind found in offices, schools, hospitals, retail, warehouses, municipal buildings, and multi-tenant residential corridors.
How fast can I get the BEST DST 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 BEST DST 689 come with a warranty?
Absolutely. The BEST DST 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 BEST DST 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 BEST DST 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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