Why do you need a free-spin on a stitching fastener?
- Read time: 1 minutes
- Date: 24 Jun 2021
- Sheeting & Cladding
- Rainscreen & Façades
What is a free-spin zone on a stitching fastener and why is it important?
The free-spin zone is a precision engineered feature on a stitching fastener creating an unthreaded section just below the head.
Stitching fasteners are designed to fix very thin sheets together. The free-spin zone prevents:
The fastener from being over-driven
The thread from stripping
The fastener from unwinding due to the cyclic nature of the wind
The waterproof seal from failing
How does the free-spin zone on a stitching fastener work?
The free-spin zone clamps two very thin sheets of metal together. It is designed to support the thin top sheet without engaging the thread, allowing the washer to create a waterproof seal. To work correctly it is essential that the thread stops abruptly rather than simply tapering out.
