ABH-1856 Architectural Builders Hardware Mfg. Inc. (ABH) is a high quality manufacturer of Overhead Holders & Stops, Hospital Latches, Electromagnetic Holders, Pivots, Strikes and Rescue Stops, Aluminum Hinges, Stainless Steel Hinges, Coordinators, Flush Bolts, Power Wire Transfers, and Roller Latches. Material: Flush Bolt – Brass Bottom Fire Bolt – Stainless Steel Fastener: 7 ea. #8 x 34 FH Combo Screws; 4 ea. 8-32 x 1/2 FH MS; 4 ea. #8 Counter Sunk Washer Features: 3/4\” bolt throw, 3/4\” backset; door strength maintained by corner reinforcing plate When door is subjected to 230F the plug and black plastic cover will melt allowing the bolt to project, locking the leaves together Bottom fire bolt eliminates need for floor prep Oversize fire bolt strike hole allows for slight door misalignment Downloads: Spec Sheet