Tensioning head for Hörmann garage door torsion springs

Replaces old articles 3042114, 3039536 and 3006026
including coil spring N8 x 18 zinc-plated

This tensioning head has been Built-in in all Hörmann sectional doors of the 20, 30 and 40 series with torsion springs since 1986. It is used to provide a torsion spring on the sectional door with the required preload.