Vít tự khoan đầu lục giác bằng thép không gỉ

Hex washer head self-drilling screws in stainless steel, for fastening metal sheets to steel framing where corrosion resistance is critical. The integrated washer face spreads the clamping load and the drill point taps its own hole, so no pre-drilling is needed. Typical for roofing, cladding and outdoor steelwork.