Commercial Full Mortise Spring Hinge 4.5×4.5 inches


The Commercial Full Mortise Spring Hinge 4.5×4.5 inches are recommended for use where automatic self-closing of a door is required. This 3 knuckled hinge is adjustable and the spring tension can be increased or decreased by using included adjusting tool. Radius or square corner available and are sold and packaged as a set of three.


Our Commercial Full Mortise Spring Hinge 4.5×4.5 inches is recommended for use where automatic self-closing is required. These three knuckled door hinges are adjustable with an adjusting tool. These spring door hinges are recommended to be used on doors in sets of three for maximum versatility and 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 are available with both a squared and radius corner, and are 4.5 in. x 4.5 in. These door hinges are available in the following colors: dull chrome, chrome, nickel, bronze, brass, and bright brass.

Make sure to check out our other sized full mortise spring hinges:

Commercial Full Mortise Spring Hinge 4.5×4.5 inches

  • Packed with wood and machine screws
  • Steel based material
  • Meets NFPA 80 for 3 hour fire rating
  • 4.5 in. x 4.5 in.
  • Square corner
  • Conforms to ANSI/BHMA -K81071F for self-closing hinges
  • UL R19063

Home Hardware Plus provides every type of commercial and residential hinge you could need to secure your door. We offer rounded and straight cornered hinges as well as variations such as spring hinges, barrel spring hinges, continuous hinges, and butt hinges that you can find anywhere you go.

Hinge Summary

To start with the very basics, a hinge is a movable joint mechanism on which a door, gate, or lid swings as it opens and closes, or that connects linked objects. They consist of two rectangular metal plates with screw holes joined by either a pin or rod. Butt hinges, which are the standard and most common hinge, tend to be used in multiples but also in three or fours to make sure that your door is securely attached in your environment.

Terms typically used to describe hinges are as follows: leaves, gauge, hinge width, length, Ball Bearing, and NRP. Gauge refers to the thickness of the leaves. Leaves are the two flaps of the hinge that are screwed to your door or other open/close surface. Ball bearing refers to the static metal between the knuckles of the hinge to help reduce friction, since hinges do wear out over time depending on the usage of the door. NRP stands for “non-removable pin” and acts as a security device for your hinge when it’s more inconvenient to separate the door from it’s frame. Home Hardware Plus has a large variety of finishes and sizes to choose from. We guarantee you’ll find a hinge that you love for the price you deserve.

Additional information


US10B, US26, US26D, US3, US4, USP