DUO System 46 x 15 – Concealed Furniture & Stair Frame Connector

The DUO 46×15 is a compact, versatile connector in the DUO-System, designed for small to medium frame joints where strength and clean design are required. Like all DUO connectors, it is non-visible, self-tightening, and quick to assemble, making it ideal for furniture and interior joinery.

Tested with a load value of 0.86 kN (transverse force, insertion direction), the DUO 46×15 offers reliable strength for lightweight to mid-duty applications such as table aprons, frames, and architectural millwork.

Features and Benefits

• Fast and efficient installation – components connect in seconds

• Concealed and architect-friendly – no visible fasteners

• Self-tightening design – adjustable with included pan head screw

• Allows reassembly and adjustment after installation

• Maintains tight joints while accommodating natural wood movement

• Certified performance tested by Holzforschung Austria

• Table aprons and frames

• Small to mid-size furniture connections

• Interior joinery and millwork

• Booths and pews

• Size: DUO 46×15 mm

• Material: Blue-galvanized, weather-resistant steel

• Load Value: 0.86 kN (transverse force, insertion direction)

• Mounting: By screwing with CS-screws Ø 5–6 mm (5×40, 5×60, 6×40, or 6×60 mm recommended for commercial use per Ö-Norm M5027)

• Installation Tools: CNC machine, long hole drilling machine, or hand router

• Suitable Materials: Solid wood and plywood from 21 mm thickness

• Advantages: Concealed, self-locking, self-tightening connector with adjustable screws

Steps

1. Cut the mortise using a 2-Flute Straight Router Bit (13/32″) with a Router Bushing (1″ OD) and the MULTI F Routing Jig.
   Note: Select the Routing Jig size according to the connector size. Optionally, use the Router Base Plate Adapter to hold the Router Bushing (1″ OD).

2. Use the Routing Jig to align and cut a 13 mm deep mortise into the end-grain or face of the wood. Mortise width is preset; mortise length matches connector size.

3. Place one DUO 46×15 connector plate into the mortise and use it as a jig to predrill holes.

4. Fasten the first connector plate with the screws provided.

5. Place the second plate over the first and tighten the pan head screws until snug, ensuring correct depth for assembly.

6. Secure the second connector plate with the screws provided.

7. Join the workpieces with a rubber mallet.

Tips

• Joints lock tightly with the dovetail-like snap mechanism.

• Allows for natural wood movement while staying adjustable if re-tightening is required.