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Specifically designed for fastening of steel roof and wall composite panels, these screws have a specially designed high thread section under the head which provides an exceptional clamping force to the outer skin of the system, maintaining the all-important weather seal. Suitable for a build-up of 26 - 50mm, which includes insulation, inner and outer skins and the profile depth if crown fixing.
Designed for fastening to steel purlins and rails with a thickness of 4.0mm - 12.5mm.
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