M6 Socket Button Screw This A2 stainless steel socket button screw has a pleasing appearance and has been designed for light duty applications such as securing guards, covers, ornamental fixtures and furniture. Features Stainless Steel Grade A2 ISO 7380 Excellent corrosion resistance Handles extremely low & high temperatures Chemical Composition Stainless Steel A2 (Grade 304) include Chromium (18%) Nickel (8%) - also known as '18/8' Notes These are not a replacement for HIGH TENSILE SCREWS What is ISO 7380? ISO is the 'International Organization for Standardization', a worldwide federation of national standards bodies. ISO 7380 consists of two parts, Part 1 is the hexagon socket button head screw and Part 2 being the hexagon socket button screws with collar.