Self-tapping screws for wood are used to fasten sheets to wooden blocks. Self-tapping screws for metal - for fastening to metal structures. They are made of steel and coated with a zinc layer for additional protection against corrosion. The kit includes a protective aluminum washer and a gasket made of EPDM, the best insulating material that vulcanizes itself on the roof, creating an impervious joint. The assortment is represented by a wide range of colors in the Ral line.
|Type of screw||Length, mm||Diameter, mm|
Max. drilling thickness, mm
|Screws for wood||35||4,8||2,5|
|Screws for steel||19||4,8||3|