Screw recesses

Screw recesses constitute some of the most commonly used function elements in extrusion cross-sections.

It is easy to connect extrusions and other elements.

Longitudinal screw recesses are used in extrusion ends to connect end plates, extrusions or other components. The most commonly used fastener is a self-threading screw that requires zero preparation.

Transverse screw recesses are used to attach anything along the extrusion with self-threading (or, in certain instances, standard metric) screws without the need for advance preparation.

A nut or bolt head may be inserted into the nut recess to attach anything anywhere along the extrusion.

Standardised Screw Recesses
Self-threading screws (ST) are normally used for these types of connection. In order for a screw recess to function well, it must be balanced. If a pocket is not created in the bottom of the screw recess, the screw will be forced towards the opening as it is driven in.

ProfilGruppen works to the following screw recess standard, the design of which is based on past experience:

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