BI metal self-drilling screws are made of high corrosion-resistant stainless steel wire. The drill part is made of hard alloy steel or SS410, so it has high penetration, and the ruspert coating has high performance corrosion resistance, even in industrial environments or high temperature acid rain areas and seaside.
BI metal self-drilling screws features:
1. Non-magnetic austenitic stainless steel, cold forged.
2. acid and alkali resistance, corrosion resistance.
3. Direct construction without pre-drilling.
4. Strong locking tension, high ductility, and outstanding roof wind resistance.
5. It is used with excellent EPDM gaskets, and the drilling parts are not leaking.

Product Application
BI metal self drilling screw with ruspert is widely used in Solar photovoltaic system roof installation, profiled steel, aluminium sheets and sandwich panels.