Roofing screws fix profiled metal sheets, sandwich panels and cladding to purlins and rails in one operation — drill, tap and seal. We stock 5.5 mm and 6.3 mm hex-head self-drilling roofing screws in Umm Al Quwain in galvanized carbon steel, bi-metal (stainless head) and A2 stainless, all with EPDM bonded washers, in lengths from 25 to 150 mm.
A roofing screw is a hex-washer-head self-drilling screw with a drill point that cuts its own hole through steel purlin or sheet, a thread that taps into it and an EPDM bonded washer that seals the penetration. Drill point number sets the steel thickness it can penetrate (#3 to 6 mm, #5 to 12 mm); thread pitch and length are chosen for the panel and purlin. Bi-metal screws combine a stainless body with a hardened carbon-steel point for corrosion resistance and drilling capacity.
Applications
- Metal roofing and wall cladding on steel purlins
- Sandwich panels and insulated roofs (long series)
- Sheet-to-sheet side laps (stitching screws)
- Skylights, ridge caps and flashings
- Container and porta-cabin construction
- Solar mounting rails on metal roofs
Standards, grades & finishes
Screws to DIN 7504 K / ISO 15480 (hex washer head), 5.5 mm (No. 12-14) and 6.3 mm (No. 14-13 / 12-24 double thread), drill points #3 / #4 / #5, lengths 19 to 150 mm, case-hardened carbon steel zinc plated (5–12 µm) or Ruspert / zinc flake (1,000 h SST), bi-metal (A2 body, C1022 point), stainless A2 / A4 with drill point. EPDM bonded washer 16 / 19 / 22 mm. Colour-painted heads to match sheet on request.
This item is imported from approved mills and held in stock in our Umm Al Quwain warehouse alongside the anchor bolts, studs and plate washers we manufacture ourselves, so complete bolt sets ship from one source. Tensile, hardness and chemical testing is carried out by independent UAE-accredited laboratories, and EN 10204 3.1 certificates are issued with every batch. We supply across the GCC, MENA and Africa.