What Are Stitching Screws Used For?
Their main purpose is stitching metal cladding panels together, particularly at sheet laps, flashings and other junctions where two light-gauge metal components need to be securely clamped. Washered stitching screws are widely used across roofing and wall-cladding installations because the bonded washer also helps resist water ingress around the fixing hole.
Longer halter fixing screws in this collection suit applications where additional fixing length is needed.
Evolution's current data lists a drilling capacity of 0.8mm to 2.5mm mild steel, so these are intended for light steel and cladding applications rather than heavy structural steel sections.
FAQs
Do stitching screws need pre-drilling?
These are self-drilling screws, so they are designed to drill and form their fixing as they are driven into suitable light-gauge steel. Always stay within the manufacturer's stated drilling capacity listed on the product pages.
What does the bonded washer do?
The 16mm bonded washer spreads the clamping load and uses an EPDM sealing element to help close the fixing point against moisture.
What is the difference between stitching and halter fixing screws
Both sit within the same light-section cladding range, but the halter fixing screws are longer, making them suitable where a greater fixing length is required.
