Rockwood 18BFB Bottom Fire Bolt for Fire Rated Metal Doors

Rockwood 18BFB Bottom Fire Bolt for Fire Rated Metal Doors

Features:

• Eliminates the bottom automatic flush bolt and dust proof strike.
• When door is subjected to 230˚F the plug and gray plastic cover will melt allowing the bolt to project, locking the leaves together.
• UL Listed only when used with automatic top bolt.
• UL Listed up to and including 3 hour opening (A Label) in conjunction with the 2840 or 2805 top Bolt for metal doors up to 4ft x 8ft
• The BFB will project during a fire. Do not cover door edge with any edge mounted door hardware (astragals)

Material & Finish: Stainless Steel - US32D
Bolt: 13⁄16" x 1-9⁄16"
Plug: 1-7⁄32" dia.