Don-Jo FF-50 Hinge Filler Plat...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$4.36
$2.79
Don-Jo FF-50 Hinge Filler Plate 5" x 1-5/8" in 10-Gauge Steel

Don-Jo FF-50 Hinge Filler Plate 5" x 1-5/8" in 10-Gauge Steel

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Model: FF-50
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$4.36
$2.79
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Don-Jo FF-50 Hinge Filler Plate 5" x 1-5/8" in 10-Gauge Steel

The Don-Jo FF-50 Hinge Filler Plate is a commercial-grade door trim accessory engineered to cover and conceal hinge cutouts on steel door frames. Constructed from heavy-duty 10-gauge steel (.134 thickness), this filler plate measures 5" in length by 1-5/8" in width, providing a precise, professional fit for standard hinge mortise locations. Designed for commercial applications, the FF-50 delivers a clean, finished appearance wherever hinge relocation or frame modification has left an exposed recess.

Key Features

  • Precise Dimensions: Measures 5" in length and 1-5/8" in width to accurately cover standard hinge mortise cutouts on commercial door frames.
  • Heavy-Duty 10-Gauge Steel Construction: Fabricated from 10 ga. (.134) steel for exceptional rigidity and long-lasting durability in demanding commercial environments.
  • Commercial-Grade Quality: Engineered specifically for commercial door trim and accessory applications, ensuring a professional finish and reliable performance.
  • Convenient Shelf Pack Quantity: Available in a shelf pack of 10, making it easy to stock and manage inventory for multi-door projects or facility maintenance programs.
  • Versatile Door Trim Application: Classified under Filler Plates, Lock Adapters and Wrap Arounds, making it suitable for a variety of door frame modification and finishing needs.

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-50?

Don-Jo Hinge Filler Plate products deliver professional-grade reliability through heavy-duty 10-gauge steel (.134) construction, ensuring a durable and precise fit for commercial door frame applications. The FF-50 is engineered for demanding environments where a clean, finished appearance and long-term structural integrity are essential requirements.

Manufacturer Resources

DON-JO Hinges

Product Specs

Subcategory:
Filler Plates
Product Group:
Door Trim and Accessories
Product Subgroup:
Filler Plates, Lock Adapters and Wrap Arounds
Product Type:
Hinge Filler Plate
Commercial/Residential:
Commercial
Product Model:
FF 50
Product Category:
Door Trim and Accessories
Product Substrate:
Steel
Department:
Door Hardware

Don-Jo FF-50 – Frequently Asked Questions

1) What is the Don-Jo FF-50 filler plate used for on a steel door frame?
The FF-50 is a flat steel plate that covers an abandoned hinge mortise on a commercial steel frame. When hinges get relocated, a frame gets reworked, or a door swap leaves an open hinge recess, the plate closes off the cutout so the jamb reads as finished rather than butchered. It is 5 x 1-5/8 inches, sized to the hinge cutout it is covering, not to the door.
2) Will a 5 inch x 1-5/8 inch hinge filler plate cover my old hinge cutout?
Measure the recess before ordering. The FF-50 covers a mortise up to 5 inches long and 1-5/8 inches wide, which is the common prep for a 4-1/2 inch commercial butt hinge in a steel frame. If your frame was prepped for a 5 inch hinge, the cutout is longer than the plate and it will not cover. Hinge prep widths vary with frame gauge and hinge leaf, so the 1-5/8 inch dimension is the one people get caught on.
3) Is the Don-Jo FF-50 heavy enough for a high traffic commercial opening?
It is 10-gauge steel at .134 thickness, which is heavier than most cover plates and heavier than the 16 or 18 gauge sheet used on typical hollow metal frames. That rigidity is why it holds flat over an open recess in a school corridor or a hospital jamb instead of oil-canning when it gets hit by a cart.
4) What finishes does the Don-Jo FF-50 hinge filler plate come in?
Four: prime coated, brass plated, chrome plated, and duronodic brown. Prime coated is the one to order if the frame is getting painted, since it takes finish paint directly and disappears into the jamb. Brass and chrome plated are for matching exposed hardware on the opening, and duronodic brown matches dark bronze anodized aluminum entrances.
5) Can I paint the Don-Jo FF-50 filler plate to match my frame color?
Order the PC prime coated version. It ships with a primer coat meant to be finish painted, so on a repaint job you fill the recess, set the plate, and it takes the same topcoat as the frame. The plated and duronodic options are decorative finishes and are not intended to be painted over.
6) Does the FF-50 go on the door or on the frame?
On the frame. It is made to cover the hinge cutout in a steel jamb where the hinge leaf was mortised in. If the leftover hinge prep is in the door edge rather than the jamb, that is a different repair, since a door edge cutout usually needs an edge filler that matches the door thickness.
7) How many Don-Jo FF-50 hinge filler plates come in a pack?
They come in shelf packs of 10. That works out well on a building where the same hinge prep repeats on every opening, since a frame reworked at all three hinge locations eats three plates per door.
8) Is the Don-Jo FF-50 rated for a fire door opening?
The FF-50 is a commercial-grade steel trim accessory in 10-gauge steel. On a labeled fire door assembly, any change to the frame prep is governed by the label and the AHJ, so treat a filler plate on a fire-rated jamb as a decision for the inspector on that opening rather than a hardware selection.
How fast can I get the Don-Jo FF-50 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-50 come with a warranty?
Absolutely. The Don-Jo FF-50 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-50?
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-50 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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