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The Cal-Royal UNIFB930 Metal and Wood Door Universal Flush Bolt is a high-performance, fire-rated hardware solution designed for securing inactive doors in commercial and institutional settings. This flush bolt set includes a self-latching bolt for the top and a fire latch bolt for the bottom, ensuring automatic and secure locking when the active door is closed. UL Listed for both metal and wood composite core fire doors up to 8 feet in height, the UNIFB930 complies with UL10C and UBC 7-2-1997 standards. Its fully automatic operation, reversible non-handed design, and 5/8" vertical adjustment make it easy to install and maintain. Built with a durable steel body and stainless steel components, it features a thermal lock that activates during fire conditions, enhancing safety and code compliance. Ideal for standard ANSI door preparations, this flush bolt is available in multiple architectural finishes to match any design aesthetic.