- Sharp T17 for self-drilling in timber
- Class 3 galvanised for corrosion protection
- Flexible EPDM rubber washer fits to contours of the polycarbonate sheet
- Hex head for easy installation with a 5/16” socket
The Otter Polydome Roofing screw is a pre-assembled screw and washer designed for fixing polycarbonate or fibreglass sheeting to timber.To use, first pre-dill a hole into the polycarbonate or fibreglass sheeting - 10mm for sheets up to 2.4m and a 12mm hole for 2.4m and above. Then using a 5/16” hex socket, install the screw slowly at 1,000RPM. Note: Not for use with metal roofing.