National 4 In. Satin Nickel Square Spring Door Hinge Big Timber Designed for hanging self-closing doors

Designed for hanging self-closing doors in basements

Allows surface airflow between the corrugations when additional ventilation is desired

Holes in the bottom of the straps allow for free concrete flow

pour directly out of bag

Cannot be painted

National 4 In. Satin Nickel Square Spring Door Hinge Big Timber Designed for hanging self-closing doorsCatalog model No. V520 series square spring door hinge. Adjustable tension. Listed for fire rated openings. Ideally suited for residential as well as commercial, industrial, and institutional uses. Manufactured with cold rolled steel. Closing speed is adjustable. Fits standard hinge cutout. Square corners.