Our Residential Full Mortise Spring Hinge 4" × 4" inches is recommended for use where automatic self-closing of a door are required. Unfinished and primed for painting, these three knuckled door hinges are adjustable with an adjusting tool. This full Mortise spring hinge is UL listed R19063 for "a" label fire doors and is sold individually. These spring door hinges are recommended to be used on doors in sets of three for maximum versatility and door support. For this door hardware, full spring tension may not be required on all hinges but can allow for greater adjustment. Our full mortise spring hinges has a radius corner, and are 4 in. x 4 in. This full mortise spring hinge is UL listed R19063 for "a" label fire doors and is sold in pairs of two.
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