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The SCHLAGE COMMERCIAL 38031605 is a 2.5-inch adapter ring designed to bridge the gap between a standard 2-1/8-inch door bore and a larger lock or trim component requiring a 2.5-inch opening. Finished in Bright Brass, it provides a clean, finished appearance around the lock or door hardware installation. The ring measures 2.5 inches in diameter and 0.3 inches in height, with a lightweight profile at 0.05 pounds. It is typically installed by locksmiths, commercial door hardware technicians, or facilities maintenance professionals when retrofitting or upgrading door hardware on pre-bored doors.
This adapter ring is suited for commercial and institutional door applications where existing door prep does not match the required bore size for new lock hardware. It is sold individually and is appropriate for use on standard interior or entry doors where a Bright Brass finish is specified. The ring accommodates the transition from a 2-1/8-inch door prep to a 2.5-inch hardware footprint, making it useful in retrofit and replacement scenarios without requiring re-boring the door.
Designed as an OEM-style adapter for commercial door lock installations requiring a transition from a 2-1/8-inch door bore to a 2.5-inch hardware mounting diameter. Consult specific lock trim or escutcheon requirements before ordering.
Installation is typically performed by a licensed locksmith or qualified door hardware technician. Before installing, confirm the door bore diameter and ensure the adapter ring seats flush against the door face. No power tools are generally required for placement, but follow all applicable building and fire-rated door hardware codes when installing hardware on rated assemblies. Do not force-fit the ring onto a bore that does not match the specified prep size.
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