National 4 In. Oil Rubbed Bronze Square Spring Door Hinge National Hardware 3 hour fire door

3 hour fire door

Can be programmed with a SDD/TKO/TCP/MVPP type tool

resulting in an endless variety of new flavor combinations

This creates a foldable tab which provides easier stapling for installation in wall

The 4-pin cylinder prevents picking and the dual locking levers provide resistance against prying and hammering

National 4 In. Oil Rubbed Bronze Square Spring Door Hinge National Hardware 3 hour fire doorCatalog 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.