BEST PH Plunger Hold Open Arm ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$345.00
$230.69
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BEST PH Plunger Hold Open Arm with Regular Mounting for 0" - 1-1/2" Reveal

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Model: PH 689

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

$345.00
$230.69
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BEST PH Plunger Hold Open Arm with Regular Mounting for 0" - 1-1/2" Reveal

The BEST PH Plunger Hold Open Arm is a commercial-grade door closer replacement arm engineered for regular mounting applications with a reveal range of 0" to 1-1/2". Designed as a compatible replacement part for BEST door closer systems, this arm provides a reliable hold-open function using a durable plunger mechanism. Suited for commercial environments where consistent door control and hold-open capability are required.

Key Features

  • Plunger Hold Open Mechanism: Integrated plunger design holds the door open at a set position, supporting traffic flow in commercial facilities.
  • Regular Mounting Configuration: Engineered for standard regular mounting installations, ensuring straightforward compatibility with existing door closer setups.
  • Reveal Range 0" - 1-1/2": Accommodates door frame reveal measurements from 0" to 1-1/2", providing flexibility across a variety of door and frame conditions.
  • Commercial-Grade Construction: Built to the performance standards expected of commercial door hardware for demanding, high-traffic applications.
  • Direct Replacement Part: Serves as a purpose-built replacement arm for compatible BEST door closer units, simplifying maintenance and minimizing downtime.
  • Model PH Identification: Clearly identified as the PH model arm, making specification and ordering straightforward for facilities managers and installers.

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: PH

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 PH?

BEST door closer arms are engineered to meet the rigorous demands of commercial door hardware applications, delivering consistent hold-open performance and reliable operation over extended service life. The PH model's plunger hold open design and precise 0" - 1-1/2" reveal compatibility make it a dependable replacement choice for facilities requiring minimal disruption and professional-grade durability.

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:
PH
Features:
Dorma Door Closer Parts & Accessories

BEST PH 689 – Frequently Asked Questions

1) What reveal does the BEST PH hold open arm work with?
The PH arm is built for regular mounting with a frame reveal of 0 inches up to 1-1/2 inches. If your closer is mounted on the pull side of the door with the shoe on the frame face and the reveal falls inside that range, this arm suits the opening. A deeper reveal than 1-1/2 inches needs a different arm or a drop plate.
2) Is the BEST PH a complete door closer or just the arm?
Arm only. The PH is a replacement door closer arm, so you are reusing the existing closer body and mounting hardware on the door. Order it when the original arm is bent, worn, or you are converting a regular-mount closer over to plunger hold open. If the closer body itself is leaking or has lost control, the arm will not fix that.
3) Can I use a plunger hold open arm on a fire rated door?
No. A mechanical hold open device must not be installed on a fire door, which has to be self-closing and self-latching; hold open on a rated opening requires an electromagnetic device tied to the fire alarm. Use the PH plunger hold open arm on non-rated openings such as offices, corridors without rated separation, retail entries, and warehouse doors.
4) How does the plunger hold open on this BEST closer arm actually work?
Hold open on the PH arm comes from a plunger built into the arm itself, not from a separate stop or magnet. Swing the door to the set position and the plunger engages to hold it there; pull the door past that point to release. It is meant for commercial traffic where doors need to stay open during deliveries or peak flow.
5) Will a plunger hold open arm work if the door swings against a wall or has a floor stop?
Hold open on this arm engages at a set position in the swing, so the door has to be able to reach that point. If a floor stop, wall, or adjacent fixture stops the door short, the plunger may never engage. Check the available swing before ordering; on short-swing openings a standard arm with a separate overhead stop is the better route.
6) What finish does the BEST PH arm come in?
One finish: 689 aluminum painted. That is the standard painted aluminum used on most commercial closers, so it blends with existing 689 closer bodies and covers across a building without a mismatch. If your other openings are brass or bronze plated, this arm will not match them visually.
7) Is the BEST PH arm suitable for high traffic openings like schools and hospitals?
Yes, it's a commercial-grade arm and the intended settings include educational facilities, healthcare institutions, office buildings, retail, warehouses, multi-tenant residential, and government buildings. For standardizing a facility, note it is a regular-mount arm for 0 to 1-1/2 inch reveals, so openings outside that reveal range need a different arm.
How fast can I get the BEST PH 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 PH 689 come with a warranty?
Absolutely. The BEST PH 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 PH 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 PH 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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