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The NATIONAL MARKER N148684 is a crescent sash lock designed to draw window frames together and reduce rattle during operation. Constructed from zinc die-cast material, this lock provides reliable durability for residential window applications. The base measures 2-7/16 inches x 1-11/16 inches x 7/8 inches, making it a compact, standard-profile hardware component. Mounting screws are included, simplifying the installation process. This type of sash lock is a common replacement or new-install hardware item for single- and double-hung windows where frame alignment and security are required.
This crescent sash lock is suited for residential window installations where frames need to be drawn together to eliminate play and prevent rattling. It is appropriate for use on standard single-hung and double-hung window assemblies. The compact base profile fits into typical sash lock mounting locations without modification. Carpenters, general contractors, and maintenance technicians commonly install this type of hardware during window servicing or renovation work.
Designed as an OEM-style replacement or new-installation crescent sash lock for standard single-hung and double-hung residential windows.
Installation is typically performed by carpenters, general contractors, or maintenance technicians using a standard screwdriver. Before installation, ensure the window sash is in the closed position to verify proper cam alignment. Use only the included mounting screws or equivalent-gauge fasteners to avoid stripping the mounting surface. Confirm the crescent cam engages the keeper plate fully before completing the install.
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