Vintage National Steel Door Hinges – Set of 3 (4½" x 4½")

Description :
This set of three National-brand steel door hinges measures 4½ inches wide by 4½ inches high and reflects the rugged, utilitarian design that became popular in mid-20th-century American construction. Each hinge features a five-knuckle barrel, flat-tip pin ends, and a heavy-gauge steel body with a factory-applied nickel or zinc finish, now showing areas of patina and oxidation from natural aging. These hinges remain fully functional and are well-suited for both restoration and reuse in industrial, institutional, or commercial settings where durability is essential.

Era
Mid-20th Century (circa 1940s–1960s).

Style
Industrial / Utility Hardware — functional design with minimal ornamentation, common in schools, factories, and postwar public buildings.

Technique
Cold-rolled steel plates, stamped and machined with precision-aligned five-knuckle barrels. Plated in nickel or zinc for corrosion resistance.

Tools Used
Stamping press, hinge die, pin setter, and plating drum.

History
Manufactured by National Manufacturing Co., an American hardware company founded in 1901 and based in Sterling, Illinois. National became a standard supplier of hinges, brackets, and builders’ hardware throughout the mid-1900s.

Manufacturer / Maker
Maker: National Manufacturing Co., Sterling, Illinois, USA.

Measurements
Each hinge: 4½" W x 4½" H Five-knuckle design with removable steel pins.

Suggested Weight
Approximately 2.5 lbs total for the set of three.

Suggested Shipping Package Dimension
7" x 6" x 4" box, padded and separated to prevent metal-on-metal abrasion.

Item Number : P15099

Category : Hinges

Brand : National Manufacturing Co., Sterling, Illinois, USA