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Browse our selection of 4" door hinges with a 5/8" radius corner — designed for doors or frames mortised for rounded-corner hinges. The larger 4" leaf size provides added surface area and smooth, reliable door operation. Fast shipping from DoorCorner.com.
Why hinge radius matters: the corner shape of the hinge leaf must match the shape of the door or jamb mortise. A 5/8"-radius hinge has rounded corners that sit flush in a rounded mortise. Using a square-corner hinge in a radius-cut mortise can result in poor fit, visible gaps, or the need for additional chiseling.
Common applications: 4" hinges are often used on standard residential doors where a slightly larger hinge leaf is desired for added support. They are well suited for interior doors, closets, storage rooms, and lighter exterior doors that see frequent use.
Fit tips before ordering: measure the height of your existing hinge (top to bottom) to confirm the 4" size, and check the hinge corners to verify a 5/8" radius. Matching both the hinge size and corner radius is the easiest way to ensure a clean, drop-in replacement.
What does “5/8" radius” mean on a door hinge?
“5/8" radius” refers to the rounded corners of the hinge leaves. Instead of sharp 90° corners, the leaf corners are curved with a 5/8-inch radius so the hinge fits flush in a rounded mortise.
Why is hinge radius important when installing hinges?
Using the correct hinge radius allows the hinge to sit flush in the mortise, helps maintain even door gaps, and ensures smooth door swing. An incorrect radius can lead to misalignment, uneven gaps, or additional door or jamb modification.
Are 4" hinges with a 5/8" radius compatible with standard residential doors?
In many cases, yes. These hinges are commonly used on standard residential interior doors and lighter exterior doors, provided the door and frame are mortised for a 5/8" radius and the door weight falls within recommended limits.
When should I choose 4" hinges instead of smaller hinge sizes?
Choose 4" hinges when your existing mortises are sized for 4" leaves, when you want added hinge surface for slightly heavier or taller doors, or when replacing original 4" hinges to ensure a proper fit and straightforward installation.
