Compared to conventional HV connection (one hexagon bolt, one hexagon nut, and two washers) the IHF Stretch-System reduces the connection to two core elements: IHF Stretchbolt und IHF Roundnut.

• IHF Stretchbolt: Stress-optimized bolt, the washer is integrated in the head of the bolt
• IHF Roundnut: Stress-optimized nut, large contact area
• IHF Stretch-System: IHF fasteners are applied with ITH bolt tensioning cylinders.

IHF fasteners are generally used in steel construction, especially on flanges.
Available standard dimensions are: M36 to M64 (1 3/8” to 2 1/2”)