සංයුක්ත වොෂර් සහිත හෙක්ස් හිස ස්වයං-විදුම් ඉස්කුරුප්පු

Hex head self-drilling screws fitted with a bonded EPDM composite washer. The sealing washer keeps water out of the fixing point, making these the standard choice for metal roofing and cladding sheets.