ONS-55/63 Stainless steel self-drilling screws for composite panels max 12mm

Stainless steel self drilling screw made ??with BIMETAL  
Hardened surface of the thread (flexible core). Corrosion resistant zinc coating of thickness not less than 12 um.  
The shape of the thread and its height is designed for applications into sandwich panels and steel construction.  
Two types of threads: one designed for mounting into a steel structure, second under head thread, prevents external panel dents and helps to seal the connection.  
The drill bit is designed to provide quick and trouble-free installation in the steel. Sharp point of the drill prevents movement of the surface of the fixture.  
Self vulcanizing EPDM washer. Temperature and UV resistant. The special shape of the washer ensures proper seating of the sealing material on the outer cladding material fixture which guarantees a proper seal.