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The NATIONAL MARKER N830333 is a 3.5-inch satin brass door hinge sold in a pack of three. Built from heavy-gauge cold-rolled steel, it delivers added structural strength for standard residential and light commercial door installations. The 5-knuckle design provides smooth, consistent pivot action, and countersunk screw holes allow fasteners to sit flush for a clean, secure mount. A nib on the hinge body contributes to a finished appearance once installed. This hinge is a practical, trade-grade fastener solution suited for carpenters, general contractors, and maintenance professionals.
This hinge is appropriate for interior and exterior door installations where a satin brass finish is specified. The 0.25-inch radius corner profile suits standard door frame mortise cuts commonly found in residential construction and light commercial applications. The pack of three covers a typical single-door installation. Catalog reference: V512RC.
Designed as an OEM-style replacement or new-install hinge for standard residential and light commercial doors requiring a 3.5-inch, 0.25-inch radius satin brass hinge.
Installation is typically performed by carpenters, finish contractors, or maintenance technicians using a chisel, drill, and appropriate wood screws. Power should not be a concern for this hardware application, but doors should be fully removed or properly supported before hinge replacement to prevent injury. Follow local building codes for door hardware installation where applicable. Do not overtighten fasteners, as this may strip the countersunk screw holes or warp the hinge leaf.
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