Don-Jo EF-86 Door 8" Mortise Lock Blank Edge Filler Plate

The Don-Jo EF-86 Mortise Lock Edge Filler Plate is a professional-grade solution designed to "blank out" or seal unused mortise lock preparations in the edge of a door. This 8-inch filler plate is essential for hardware retrofits where a heavy-duty mortise lockset has been removed or relocated. By filling the large hardware cavity, the EF-86 restores the door's flush edge, maintaining both the structural integrity and the architectural aesthetic of the opening.

Measuring 8" x 1-1/4", this plate is precision-engineered to fit the industry-standard "86 prep" found on most commercial hollow metal and wood doors. It is an indispensable solution for door restoration in high-traffic facilities like hospitals, schools, and government buildings.

Key Features & Performance

• Standard 86 Prep Coverage: Specifically designed to fit the 8" x 1-1/4" mortise lock edge cutout, providing a seamless, flush-mount finish.
  
• Structural Reinforcement: Fills the deep pocket left by a mortise lock body, preventing the door edge from becoming vulnerable to damage and protecting the internal door core.
• Fire Safety Maintenance: Properly sealing abandoned hardware voids is a critical requirement for maintaining the rating of fire-rated door assemblies, as it prevents smoke and heat bypass through the door edge.
• Professional Grey Primer Finish: Supplied in a high-quality grey primer (PC), providing an ideal surface for on-site painting to match the existing door color perfectly.
  
• Commercial-Grade Durability: Manufactured from high-strength steel to withstand the rigors of industrial environments and resist tampering.

Technical Details & Specifications

• Brand: Don-Jo
• Model Number: EF-86
• Height: 8"
• Width: 1-1/4"
• Material: Durable Steel
• Finish: Grey Primer (PC)
  
• Application: Mortise Lock Edge Prep Blanking Plate
• Fasteners: Packaged with two machine screws for a secure attachment to the door's existing mounting tabs. For high-security applications, these can be installed using thru bolts to ensure a permanent, vibration-resistant mount.
  

Why Choose the Don-Jo EF-86?

The Don-Jo EF-86 is the premier choice for facility managers and locksmiths who need to "clean up" an opening after a hardware transition. Leaving a large mortise pocket open in a door edge is not only an eyesore but also a potential point of failure for building security and fire code compliance. This commercial-grade filler plate offers a cost-effective, permanent solution for door edge repair, ensuring your entryways remain professional, secure, and fully compliant with institutional standards.

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