Vortex Stitch 6.5mm diameter-13 threads per inch x 20mm long screw class 4 coating
Vortex Stitch screws are for heavy duty stitching of roofing and walling profiles to steel with sealing washer.
Vortex Screws are a universal screw for fixing to steel up to 1.5mm thick.
The Class 4 corrosion protection system meets the requirements of ISO 9223 Category 4 (Outdoor application for moderate and severe environments).
AS 3566.2 (Self drilling screws for the building & construction industries) specifies the corrosion protection systems required on screw fasteners Classes 1, 2, 3 & 4 where Class 1 is intended for indoor application and Class 4 for environments up to and including ISO 9223 Category 4 (Severe industrial and severe marine environments).
