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The SCHLAGE COMMERCIAL 38031613 is a 2.5-inch adapter ring designed to bridge a standard 2-1/8-inch door prep bore to accept a larger lockset or trim plate. Finished in oil rubbed bronze, it provides a clean, finished appearance around the cylinder or knob base when the existing door cutout does not match the hardware footprint. Locksmiths, commercial door hardware installers, and facility maintenance technicians install this ring during hardware replacement or upgrade projects where bore size mismatches occur. Weighing only 0.1 pounds, it ships as a single unit and is straightforward to fit in the field.
This adapter ring is used in commercial and institutional door hardware installations where a 2-1/8-inch cylindrical bore requires adaptation to accommodate hardware with a larger trim or rose diameter. It is appropriate for interior and exterior door applications in office buildings, multi-family housing, and institutional facilities. The oil rubbed bronze finish is suited for installations where matching dark-toned door hardware finishes is required for aesthetic consistency across a building or suite.
Designed as an OEM-style adapter for use with cylindrical door hardware requiring a 2-1/8-inch bore preparation and a 2.5-inch adapter ring in oil rubbed bronze finish.
Installation should be performed by a licensed locksmith or qualified door hardware technician. Remove all existing hardware and confirm the bore diameter before fitting the adapter ring. Ensure the door is secure and not under load during hardware service. Follow applicable local building codes and hardware manufacturer guidelines for proper trim and lockset assembly.
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