Self-Drilling Screws
Sandwich Panel Self-Drilling Screw
Long hex washer head screws with a secondary thread to clamp insulated sandwich panels to steel purlins.
ST5.5C1022 steel
Steel warehouse with sandwich panel roof and walls
Long self-drilling screws for 100–150 mm insulated panels on hot-rolled purlins in a hot, dusty climate.
- Industrial buildingssector
- Middle East & Africaregion
- 4screw types
- Samplesfor site tests
The challenge
Thick insulated panels need screws up to 220 mm that drill 6 mm purlins without wandering, and clamp the outer skin without crushing the foam core. High daytime temperatures age washers fast.
Our fastening solution
- Sandwich panel screws with a support thread under the head to hold the outer sheet.
- #5 drill points for 4–6 mm hot-rolled purlins.
- UV-stabilised 19 mm EPDM washers and colour-matched painted heads.
- Mixed-size container loading with cartons labelled by panel thickness.
Specification summary
| Main fixing | Sandwich panel screw 5.5 × 150–220 mm |
|---|---|
| Point | #5 |
| Washer | EPDM 19 mm |
| Finish | Zinc + RAL painted head |
Products used
Screws in this specification
Self-Drilling Screws
Colour Painted Hex Head Roofing Screw
Self-drilling roofing screws with heads powder-painted to match RAL and Colorbond sheet colours.
DIN 7504 KST4.8
Self-Drilling Screws
Hex Washer Head Self-Drilling Screw with EPDM Washer
DIN 7504K indented hex washer head roofing screw with bonded EPDM washer, ST4.2–ST6.3, drill points #1–#5.
DIN 7504 KST4.2
Self-Drilling Screws
Hex Flange Head Self-Drilling Screw
Galvanised hex flange head Tek screw with integral serrated flange, for steel-to-steel framing and cladding.
ST3.5–ST6.3Carbon steel
More projects
Other applications
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Collated and loose screws for partitions and ceilings where speed and consistent countersinking drive the schedule.
Hardwood decking and timber structures
Corrosion-resistant timber screws that will not stain tannin-rich hardwood or split board ends.
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