Aluminium system profiles are the basis of modular structures in machine and plant engineering. They combine high stability with low weight and allow flexible, bolted structures without any welding.

An angle bracket (also corner bracket or mounting bracket) is a form- and force-fitting connecting element for modular aluminium construction profiles.

An automatic connector is a form- and force-fitting connecting element for aluminium construction profiles that is fitted without any machining of the profile.

Friction locking (a friction fit) describes a type of joint in which forces are transmitted by friction between two surfaces pressed together.

The grid dimension (also profile grid or module dimension) defines the basic geometry of an aluminium profile system (e.g. 40 × 40 mm) and the spacing of the slots.

The second moment of area is a geometric property of a part's cross-section that describes its resistance to deformation in bending.

Slide-in, spring-loaded or hammer nut? This guide compares the three designs, explains the difference between I-type and B-type and shows what matters in material, slot width and tightening torque.

A tap drill hole is the cylindrical pilot hole needed in order to cut or form an internal thread in a workpiece.

A butt connector (also called a longitudinal connector or profile extension) is a mechanical assembly component that joins two aluminium construction profiles end to end at 180°.

Positive locking (also called form fit or geometric locking) describes a type of joint in which relative movement between two parts is blocked by their geometries interlocking.

On aluminium construction profiles, the slot – specifically the slot width – is the clear opening of the T-shaped groove in the profile cross-section. It defines which system a profile belongs to and which accessories fit.