50x50 (mm) Polished Stainless Steel Square Hinge

Square hinge in polished stainless steel with protruding knot

How to choose the right hinge?

Measure the size of the door or window. Choose the type of hinge that suits the location of the door or window. Hinges are available in many styles and types. Ensure that the hinge is compatible with the material of the door or window. Check the features of the hinge, such as the number of fixing screws, the length of the pins, and the type of fixing bolts. Make sure that the hinge is easy to install and use. If you would like more information about hinges, feel free to consult our blog by clicking here.

Stainless Steel A4

A4 grade steels, alloyed with molybdenum, are "acid-resistant" and provide better corrosion resistance. A4 is widely used in the cellulose industry as this steel grade is developed for boiling sulfuric acid. It is also suitable to some extent for chlorinated environments. A4 is also frequently used by the food industry and the shipbuilding industry.

Protruding knot hinge

A protruding knot hinge is a type of hinge designed to allow a door to pivot around a fixed vertical axis while providing a certain degree of resistance to keep the door in place once it is opened or closed. This means that when mounted, the hinges are practically invisible, giving a more aesthetic appearance to the door and frame. Protruding knot hinges are recessed into mortises cut into the door and frame.

Technical Dimensions

Below is the table of technical dimensions:

Dimensions in mm

Difference between rolled knot hinge / protruding knot hinge

Protruding knot hinges are often considered more aesthetic than rolled knot hinges, as they are practically invisible once the door is closed. However, rolled knot hinges may be more resistant and durable than protruding knot hinges due to their more robust construction. The choice between these two types of hinges will therefore depend on the specific needs of each project.