Tek Self-Drilling Roofing Stitching Screws – Metal Sheet to Sheet – Zinc
£3.39£4.07 EX VATINC VAT
Self-drilling stitching screws for joining metal roofing sheets without pre-drilling. Zinc-plated with washered hex head. Fixes sheets up to 1.6mm combined thickness. Pack of 100.
These self-drilling stitching screws are designed for fixing metal roofing sheets together quickly and cleanly. The self-drilling point cuts through sheet metal up to 1.6mm thick without the need for a pilot hole, saving time on every fix. If you have ever spent half a morning drilling pilot holes across a roof, you will appreciate the difference.
The 6.3 x 22mm size is the standard choice for stitching laps on profiled metal roofing and cladding. The zinc plating provides solid corrosion resistance for external use, and the integral washer under the hex head creates a weather-tight seal at each fixing point. This matters on roofs. Water finds its way into everything eventually, but a proper washered head gives you the best chance of keeping it out.
How stitching screws work on metal roofs
Stitching screws sit in the raised ribs of profiled sheeting, pulling the overlapping sheets tightly together. Unlike through-fixings that go into purlins, these screws only join sheet to sheet. The tapered shank draws the two layers together as you drive the screw home, creating a secure mechanical connection without distorting the profile.
The hex head takes a standard 8mm socket or nut spinner, so you can run these in quickly with a drill or impact driver. On a decent-sized roof, that adds up to real time saved. The self-drilling point means one tool, one action, one fix no swapping between drill bits and drivers.
Where to use them
These screws suit agricultural buildings, industrial units, portal frame structures, and domestic outbuildings with profiled metal roofing or cladding. They work on galvanised steel, pre-painted steel, and aluminium sheets. Contractors fitting box profile, corrugated, or composite panel systems will find these a reliable everyday fixing.
The 100-pack is a practical quantity for smaller jobs or topping up stock. For larger roofing contracts, buying in bulk keeps the cost per screw down and means fewer trips to the supplier mid-job.
Pro Tip: Run the screw in until the washer just compresses against the sheet. Overtightening distorts the washer and breaks the seal.
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