Pan head hex socket screw with flange according to ISO 7380-2 standard, stainless acid-resistant steel A4. The flange provides a larger bearing surface and better load distribution. A4 stainless offers excellent corrosion resistance in humid, chemical, and marine environments. Commonly used in stainless assemblies, equipment, and outdoor installations where appearance and durability are important. Available in multiple sizes from SWEBOLT & BOTNIA BOLT.