Inside L Corner Bracket

L-shaped connectors that fit inside T-slot grooves of two perpendicular aluminium extrusion profiles to create concealed 90-degree joints. Made from zinc alloy or aluminium alloy for clean structural connections with no visible exterior hardware.

Specification #

Dimension #

• Dimensions vary by profile series. Representative sizes below.

Benefits #

Inside L corner brackets solve the problem of visible fasteners at 90-degree joints in aluminium extrusion frames. By sliding both arms into the T-slot grooves of perpendicular profiles and tightening set screws, the bracket remains entirely concealed within the profile cross-section. This produces a clean exterior with no protruding hardware, which is important for enclosures, machine guards, and aesthetic-sensitive assemblies. Installation requires no machining or drilling of the profiles. The concealed connection preserves all external T-slot faces for mounting panels, sensors, or accessories without bracket interference. While limited in torsional strength compared to external brackets, inside corner brackets are sufficient for light-duty frames, 3D printer structures, and prototype assemblies where appearance and slot accessibility take priority over maximum joint rigidity.

Common Applications #

Inside L corner brackets are used in T-slot aluminium framing where a concealed 90-degree joint is preferred over visible external hardware.

• 3D printer frames
• CNC router frames
• Laser engraver structures
• Robotics projects
• Industrial aluminium frame structures
• Machine enclosures
• Light-duty modular assemblies