Don-Jo FF-35 Frame Filler Plat...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$4.10
$3.51
Don-Jo FF-35 Frame Filler Plate 1.25" x 3.5" in 10-Gauge Steel

Don-Jo FF-35 Frame Filler Plate 1.25" x 3.5" in 10-Gauge Steel

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Model: FF-35

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

$4.10
$3.51
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Don-Jo FF-35 Frame Filler Plate 1.25" x 3.5" in 10-Gauge Steel

The Don-Jo FF-35 Frame Filler Plate is a commercial-grade steel filler plate measuring 1.25" wide by 3.5" tall, engineered to cover and conceal unwanted cutouts, voids, or imperfections in door frames. Constructed from heavy-duty 10-gauge (.134) steel, this filler plate delivers the structural integrity and durability required for demanding commercial door hardware applications. Finished in a prime coat, it is ready for field painting to match any frame finish, making it a versatile solution for professional installers and contractors.

Key Features

  • Precise Dimensions: Measures 1.25" wide by 3.5" tall, providing an accurate fit for standard frame filler applications.
  • Heavy-Duty 10-Gauge Steel Construction: Fabricated from 10ga. (.134) steel for exceptional strength and long-term durability in commercial environments.
  • Prime Coat Finish: Ships with a prime coat finish, ready for field painting to seamlessly match existing door frame finishes on-site.
  • Commercial-Grade Quality: Designed and rated for commercial applications, ensuring reliable performance in high-use institutional and commercial settings.
  • Convenient Shelf Pack Quantity: Available in shelf packs of 10, making it easy to stock and manage inventory for multi-door projects or ongoing maintenance needs.
  • Versatile Door Trim Accessory: Classified as a filler plate within the Door Trim and Accessories category, suitable for covering voids and adapting frames to updated hardware configurations.

Technical Specifications

  • Subcategory: Filler Plates
  • Product Group: Door Trim and Accessories
  • Product Subgroup: Filler Plates, Lock Adapters and Wrap Arounds
  • Commercial/Residential: Commercial
  • Product Category: Door Trim and Accessories
  • Department: Door Hardware

Typical Applications

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

Why Don-Jo FF-35?

Don-Jo Frame Filler Plates are built to professional commercial standards, utilizing heavy-duty 10-gauge (.134) steel construction that stands up to the rigors of high-traffic door hardware environments. The FF-35 is engineered for installers and contractors who demand reliable, properly sized components that integrate cleanly into commercial door frame systems without compromise.

Product Specs

Subcategory:
Filler Plates
Product Group:
Door Trim and Accessories
Product Subgroup:
Filler Plates, Lock Adapters and Wrap Arounds
Product Type:
Frame Filler Plate
Commercial/Residential:
Commercial
Product Model:
FF 35
Product Finish:
Prime Coat
Product Category:
Door Trim and Accessories
Product Substrate:
Steel
Department:
Door Hardware

Don-Jo FF-35 – Frequently Asked Questions

1) What is a Don-Jo FF-35 frame filler plate used for?
The FF-35 covers unwanted cutouts, voids, or old hardware prep in a door frame. When hardware gets swapped out and the previous strike or hinge prep leaves an open hole in the jamb, this steel plate closes it off so the frame looks finished and there is no opening left in the metal. It measures 1.25 by 3.5 inches, so it suits small frame prep holes rather than a full strike or lock cutout.
2) Will a 1.25 x 3.5 inch Don-Jo FF-35 filler plate cover my old strike cutout?
Measure the hole first. The FF-35 gives you 1.25 x 3.5 inches of coverage, so anything larger than that in either direction will still show. A standard ANSI strike prep in a hollow metal frame is considerably bigger than 1.25 inches wide, so if you are filling a full ANSI strike cutout you need a larger filler plate, not this one. The FF-35 is sized for narrow prep openings, like a T-strike or small cutout in the jamb.
3) What finish does the Don-Jo FF-35 come in, and can I paint it?
Prime coat is the only finish offered on the FF-35. That is a paintable base, not a final finish, so plan on field painting it to match the frame. For a plate meant to disappear into a jamb, that is usually what you want anyway, since frame paint colors rarely match a stock plated finish. If you need a plate that arrives in a plated architectural finish instead, prime coat is the wrong choice.
4) How thick is the steel on the Don-Jo FF-35 filler plate?
10-gauge steel, .134 inch thick. That is heavy for a cover plate, and it matters in two places: it stays flat rather than oil-canning across an open hole, and it resists being pushed in or pried at an exposed jamb opening in a high traffic building. A thinner cover plate will dimple over a void.
5) Do I need a filler plate or a wrap around plate for my door frame?
Different jobs. A filler plate like the FF-35 goes on the frame and blanks off a hole left behind in the jamb, 1.25 x 3.5 inches of coverage in this case. A wrap around plate goes on the door itself and wraps the edge to reinforce or conceal damaged lock prep. If the damage is on the door face around the lock, a filler plate will not help you; if it is an empty cutout in the frame, this is the right family of part.
6) Is the Don-Jo FF-35 filler plate rated for commercial buildings or is it a residential part?
Commercial. The FF-35 is a commercial-grade frame filler plate, and the 10-gauge steel body is built for the traffic in offices, schools, healthcare, retail, warehouses, and government buildings. Nothing stops you using it on a residential opening, but it is specified for institutional and commercial frames.
7) How many Don-Jo FF-35 filler plates come in a pack?
Shelf packs of 10. If you are patching frames across a building after a hardware changeout, that pack size covers ten openings, which is how these are normally bought for maintenance stock rather than one at a time.
How fast can I get the Don-Jo FF-35 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 Don-Jo FF-35 come with a warranty?
Absolutely. The Don-Jo FF-35 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 Don-Jo FF-35?
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 Don-Jo FF-35 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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