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The NATIONAL MARKER N830327 is a 3-pack of 3.5-inch satin nickel door hinges built for residential and light commercial door installations. Each hinge is formed from heavy-gauge cold-rolled steel for added strength and features a satin nickel finish that delivers a clean, professional appearance. The 5-knuckle design distributes load evenly across the hinge barrel, and countersunk screw holes allow fasteners to sit flush for a finished look. A nib on each hinge leaf further supports a refined, tight fit against the door frame.
These hinges are suited for interior door applications where a durable, corrosion-resistant finish is required. The 1/4-inch radius corner profile is a common specification for pre-hung interior doors in residential construction and remodel work. Each pack contains 3 hinges, providing a full set for a standard interior door installation. Carpenters, general contractors, and finish tradespeople typically install these as part of door hardware rough-in or finish work.
Designed as an OEM-style replacement or new-installation hinge for standard interior doors requiring a 3.5-inch, 1/4-inch radius hinge mortise.
Installation is performed by carpenters or finish tradespeople using a chisel and mallet to set the mortise, or a router with a hinge template for production work. Remove the door from the opening before routing or chiseling hinge mortises to prevent damage to surrounding surfaces. Ensure the hinge leaf sits fully recessed in the mortise so the hinge barrel clears the door stop. Secure with the provided countersunk screws and verify the door swings freely before finishing.
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