National 4 In. Satin Nickel 1/4 In. Radius Spring Door Hinge Safety Wear V520 series square spring door

V520 series square spring door hinge

Square plasterguard allows for simple 90° cuts and snaps into place

It features a 36″ fiberglass handle for increased handle strength

to 5-3/4 In

Easily installs in the standard kerf slot of the door frame

National 4 In. Satin Nickel 1/4 In. Radius Spring Door Hinge Safety Wear V520 series square spring doorCatalog model No. V521 series. Cold rolled steel. Designed for hanging self closing doors in basements, stairways, garages, and entrances. Can be used in residential, commercial, and apartment buildings. Hinge is UL approved for fire doors. Closing speed is adjustable. Fits standard hinge cutout. 1 4' radius, round corner automatic door closing spring hinge.