Concealed Steel Hinge - Model #103

Product #: 420103145
Finish: Satin Chrome Satin Brass Modify Options
Product number Finish
420103145 Satin Chrome
420103160 Satin Brass


The hinge is invisible when closed.

Richelieu's concealed hinges offer superior appearance and durability with contemporary and functional style. They easily install and can be used for many applications on wood or metal doors to meet all your needs.


Product number
Minimum Door Thickness
3/4 in
Type of Hinge
Wood or Metal
For Hinge #
Wood Screw Sizes
#6 x 1" (3.5 mm x 25 mm)
Dimension A
1/2 in
Dimension B
3/8 in
Dimension C
1 1/2 in
Dimension D
1/8 in
Dimension E
1/8 in
Dimension F
11/16 in
Dimension G
1/32 in
Dimension H
19/32 in
Dimension I
7/32 in
Hinge Opening Angle


Security: When closed, the SOSS concealed hinge cannot be seen or tampered with. When opened, the riveted hinge pin is non-removable.

Safety: The moving pivot point remains inside the hinge during movement until fully opened, eliminating an external pinch point on the back side of the door.

Strength: The installed hinge is firmly anchored in a deep, full mortise with screws to support the door and provide a rigid and secure installation.

Superior Construction: Concealed hinges are designed to ensure reliable operation for years. The standard hinges are made of high-strength steel and zinc alloy.

Smooth Operation: All hinges have been designed and developed to give smooth performance and reduce friction.


The concealed hinges are used by designers, architects, and engineers to help solve design problems associated with today`s ultra modern materials. Our hinges are found in many applications where concealment, compact size, and smooth operation are essential. Concealed hinges can be found in various high-tech products including, computers, cash registers, copy machines, medical equipment, and office equipment.

Limited only by the imagination of the designer, SOSS concealed hinges are used in Cessna Bravo jets, custom furniture by experts in the cabinet and display industry and wherever invisibility and flexibility are of paramount importance. SOSS concealed hinges open a full 180° and operate with a single action. Ideally suited for mirrored doors, gates, wall panels, pass doors, storage cabinets, electronic and computer devices, wall units, hidden doors, pharmaceutical storage areas, courtrooms, and churches.

SOSS concealed hinges are used in restaurants, homes, and offices to create environments with clean lines.


Picture for visual reference only: actual product may vary from that shown in photo.
Always use the instructions inside the packaging provided by the manufacturer, as the manufacturer reserves the right to make technical changes or modify information without prior notice!
Always make sure to fix properly the product using the right fixation for the proper material.
Never exceed the maximum weight or the maximum dimension recommended by the manufacturer.
Never use any spray lubricant on these products.


The preceding information, as well as any technical recommendations given in writing, verbally or based on tests, is provided to the best of our knowledge. However, recommendations are non-binding and do not affect your responsibility to determine the correctness of the given recommendations and the suitability of the product for your particular purposes. The application, use, or processing of our products, as well as the production of products based on our technical recommendations, are out of our control and therefore fall exclusively under your responsibility. Sales of our products are subject to our most recent General Sales and Delivery Conditions. Please note that Richelieu will not accept any returns or claims for unpackaged products.
Concealed Steel Hinge - Model #103

Product number: 420103145