Don-Jo FF-50 Frame 5" Hinge Filler Plate

The Don-Jo FF-50 Frame Hinge Filler Plate is an industrial-strength hardware component designed for the maintenance and repair of heavy-duty commercial door frames. This 5-inch hinge filler is used to securely plug the mortise (recess) in a hollow metal frame when a hinge is removed, relocated, or abandoned during a hardware retrofit. By closing off the large hardware void, the FF-50 restores the structural integrity of the frame and provides a smooth, flush surface for a professional, clean aesthetic.

Sized at 5" x 1-5/8", this plate is specifically engineered for high-traffic entryways that utilize larger, heavy-weight hinges. It is an essential solution for commercial door frame repair in institutional settings such as hospitals, schools, and industrial facilities.

Key Features & Performance

• Heavy-Duty Thickness: At .145" thick, this plate is manufactured to match the depth of heavy-weight commercial hinges, ensuring a perfectly flush finish with the face of the frame.
• Large Format Compatibility: Specifically designed for 5-inch hinge preps, which are standard for oversized, high-frequency, or heavy-duty lead-lined doors.
• Durable Steel Construction: Provides a permanent, impact-resistant seal that prevents debris accumulation and air infiltration through the frame pocket.
• Professional Grey Prime Finish: Supplied in a high-quality grey primer, allowing for immediate on-site painting to match the existing door frame color seamlessly.
  
• Fire-Rated Safety Compliance: Properly filling unused hardware preps is a critical requirement for maintaining the rating of fire-rated door assemblies, preventing smoke and heat bypass.

Technical Details & Specifications

• Brand: Don-Jo
• Model Number: FF-50
• Height: 5"
• Width: 1-5/8"
  
• Thickness: .145 (Heavy-Weight/Commercial Grade)
• Material: High-strength Steel
• Finish: Grey Prime (PC)
• Fasteners: Packaged with two machine screws. For high-vibration or high-security applications, these can be substituted with thru bolts for a permanent mount.

Why Choose the Don-Jo FF-50?

The Don-Jo FF-50 is the premier choice for facility managers and locksmiths who need to "blank out" 5-inch frame preps. Leaving an open mortise in a commercial frame is both an eyesore and a security risk; this commercial frame filler plate offers a permanent, code-compliant way to bridge the gap. Its precision engineering and heavy-gauge steel construction ensure a professional result that makeshift fillers cannot provide.

​