Mounting Plates for Concealed Hinges: Cross Mounting Plate vs Linear Spacer Plate (H0–H3)

The mounting plate connects the concealed hinge to the cabinet carcass and, through its height (distance H0 to H3), determines the exact reveal and gap alignment of the cabinet door.

Anyone who installs cabinet doors professionally knows: the best hinge is useless without the precisely matched counterpart on the internal cabinet wall. Choosing the correct mounting plate determines whether a door closes flush, whether the gap dimensions are accurate, and whether the door remains stable within the carcass over time. When planning furniture hardware, cabinet makers and installers primarily face two questions: Which design is right – the classic cross mounting plate (cruciform) or the slim linear mounting plate? And which distance (H-value) is required to achieve the desired door overlay?

This guide breaks down the technical differences and helps you select the exact components for your furniture build.

Key Purchasing Criteria for Mounting Plates

Before considering the design, the fundamental technical parameters of the cabinet construction must be established. The mounting plate must be compatible with the chosen concealed hinges / cabinet hinges.

• Drilling Pattern and System 32: In industrial and bespoke cabinet making, System 32 is the standard. The fixing holes of the mounting plate are spaced at exactly 32 mm from centre to centre. The distance from the front hole to the front carcass edge is typically 37 mm.
• Fixing Type: Mounting plates are secured into the carcass using pre-mounted Euro screws (for 5 mm holes), classic wood screws (usually countersunk screws with a 3.5 mm or 4 mm diameter), or via press-in dowels (tool-less installation).
• Adjustability: High-quality plates feature eccentric cam adjustment. This allows seamless vertical door adjustment, usually by ± 2 mm via an adjustment screw, without having to loosen the fixing screws. Simpler models use a slotted hole for manual adjustment.
• Hinge Cup Diameter: The hinge arm must match the plate. The standard in cabinet making is a cup diameter of 35 mm, for which the widest selection of concealed hinges 35 mm is available.

Types at a Glance: Cross Mounting Plate vs Linear Mounting Plate

The design of the plate influences stability, ease of installation, and internal cabinet aesthetics.

The Cross Mounting Plate (Cruciform)

The cross mounting plate is the absolute standard in furniture construction. It owes its name to its cross-shaped base plate, which frequently provides three or four fixing points.

• Advantages: Thanks to the wide contact area and offset screw positions, it offers exceptionally high pull-out resistance. It is ideally suited for heavy doors, high leverage forces (e.g. wide cabinet doors), and heavily used pieces of furniture.
• Disadvantages: It is visually more prominent and occupies more space inside the cabinet carcass.

The Linear Mounting Plate (Spacer Plate)

The linear mounting plate is slim and straight in design. Once the hinge is clipped into place, it is almost entirely concealed beneath the hinge arm.

• Advantages: The appearance is significantly cleaner and more minimalist. It is frequently utilised in high-end living room furniture, glass display cabinets, or where carcass space is severely restricted.
• Disadvantages: It usually provides only two fixing points in a straight line. For very heavy doors (e.g. thick MDF panels), the leverage exerted on the fixing screws is higher than with the cross-style variant.

Calculating the Height: What Do H0, H1, H2, and H3 Mean?

The interplay between the concealed hinge and the mounting plate works like a gear system – if one tooth does not mesh properly, the entire door mechanism binds. The decisive factor for the gap and reveal is the distance, which is the height of the mounting plate. This is generally indicated by the letter H along with a number (or the direct millimetre dimension).

• H0 (0 mm): The standard plate. It sits flat against the carcass side. It is most commonly used when the cabinet door needs to cover a 19 mm thick carcass side fully.
• H1.5 / H2 / H3 (1.5 mm to 3 mm): These plates have a taller profile. They space the hinge arm further out into the cabinet opening.

Rule of thumb for overlay planning: The taller the mounting plate (i.e. the larger the H-value), the smaller the door overlay on the carcass side. If your door should not cover the full 19 mm of the side panel, but only 15 mm, you will need a taller mounting plate to space the hinge away accordingly.

Which Concealed Hinge with Which Mounting Plate? (Selection Guide)

The choice of plate directly depends on the selected door overlay and opening angle.

• Case 1: The door should fully cover the carcass edge (Full overlay door).

  Here you choose a standard hinge for full overlay applications. You will almost always combine this with a mounting plate with an H0 distance. This ensures maximum overlay. Suitable hardware can be found under concealed hinges full overlay. A standard opening angle for standard cupboards is 110°. Matching models are available under concealed hinges / cabinet hinges 110 degrees.

• Case 2: Two doors share a central carcass partition (Half overlay door).

  In this scenario, each door may only cover half the thickness of the central partition (e.g. 9.5 mm). You should choose a hinge designed for half overlay. An H0 plate is also typically used here, as the crank (bend) of the hinge arm already accounts for the reduced overlay. See concealed hinges half overlay.

• Case 3: The door sits flush inside the carcass (Inset door).

  In this construction, the door does not sit on the front edge but sits between the carcass side panels. An inset hinge is required for this. Depending on the desired gap between the door and the inner side of the carcass, taller mounting plates (e.g. H2 or H3) are frequently used. Matching mechanisms can be found under concealed hinges inset.

• Additional Feature – Soft-Close: Regardless of the mounting plate height, modern hinges featuring integrated soft-close mechanisms can be clipped on. The damping mechanism is built into the hinge arm or cup, leaving the mounting plate identical. Corresponding models are listed under concealed hinges / cabinet hinges with soft close.

Installation Guide: Aligning Mounting Plates Correctly

For the precise installation of a cross mounting plate, you will need the following tools:

• Tape measure or rule
• Marking awl or pencil
• Cordless screwdriver with a PZ2 bit
• Optional: A centring/marking jig for System 32

Step-by-step installation:

1. Marking: Mark the horizontal centre line of the hinge on the inside of the cabinet carcass.
2. Measuring the distance: Mark exactly 37 mm inward from the front carcass edge. This serves as the vertical axis for the front fixing screws.
3. Drilling: When using Euro screws, pre-drill with a 5 mm wood drill bit (caution: use a depth stop to avoid drilling through the side panel). For standard wood screws, a light centre punch mark is sufficient.
4. Screwing into place: Secure the mounting plate. Ensure that the arrow on the plate (if present) points towards the front carcass edge.
5. Clipping on: Push the concealed hinge onto the plate using the clip-on mechanism from front to back until it audibly clicks into place.

Frequently Asked Questions (FAQ)

Can I mix mounting plates and concealed hinges from different manufacturers?

No. The clip-on or slide-on attachment mechanisms and the positions of the locking pins are manufacturer-specific. A hinge from Manufacturer A will not fit onto a cross mounting plate from Manufacturer B. Always remain within the same hardware system.

What does H0 mean on a mounting plate?

H0 denotes a distance of 0 mm. This means the mounting plate has the lowest possible profile height in that system. It is used as standard for full overlay doors on carcass thicknesses from 16 mm to 19 mm.

Is a cross mounting plate sturdier than a linear spacer plate?

Yes. Due to the wider cruciform footprint and the offset positioning of the fixing screws, the leverage forces from the cabinet door are distributed more effectively across the carcass panel. For large, heavy doors made of solid wood or thick chipboard, the cross mounting plate is the technically superior and safer choice.

Why will my cabinet door not close properly despite maximum adjustment?

If the eccentric adjustment screw has reached its maximum limit and the door still catches on the adjacent carcass, the chosen plate height is incorrect. The mounting plate is too tall (e.g. H3 instead of H0), which pushes the door too far outwards. Alternatively, a half overlay hinge may have been installed instead of a full overlay hinge.

Can I replace a damaged mounting plate individually?

Yes, provided you use the exact same model (same manufacturer, identical distance height). Release the hinge using the clip-on mechanism, unscrew the old plate, and attach the replacement into the existing screw holes.