Roof screws DIN7504 are primary screws mainly used in metal sheets or roof panels. Tianjin Rio Tinto, as a professional screw manufacturer, we have our own production lines to produce general and customized products. We will control product quality at every step of production;

The main raw material is C1022A, and electro-galvanizing is widely used, which has good anti-corrosion ability and corrosion resistance. Dacromet, Rexiubao, stainless steel, etc. can also be produced according to customer needs;

EPDM rubber gaskets are suitable for outdoor applications requiring weather resistance and water resistance. Not easy to open or crack;

Hex washer head tapping screws are primarily used in metal and wood applications. The thicknesses we can provide include #10(4.8mm), #12(5.5mm), #14(6.3mm). Length from 16mm-150mm. All screws are heat treated and have good hardness.

In addition, we can also provide free samples, customized packaging services, etc.