Self-Threading T.E. 6.3x

Iridiscent CHROMITING galvanic treatment (less visual impact on the panel), with resistance to weathering corrosion (corrosion in Salt Spray >800h) and pollution far superior to all normal galvanizing or metal coatings; Ø 6.3 mm for fastenings on sheet metal, light and heavy sections, roofing and prefabricated metal walls with thicknesses from 1.5 to 8 mm., without prior tapping 50 mm.